Bibliografías temáticas / Resynchronization technique

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Literatura académica sobre el tema "Resynchronization technique"

Autor: Grafiati
Publicado: 10 de mayo de 2025

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Artículos de revistas sobre el tema "Resynchronization technique"

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Semeniuk, O. I., M. S. Sorokivskyy, U. P. Chernyaha-Royko, B. B. Kravchuk y O. J. Zharinov. "Методи ресинхронізаційної терапії в пацієнтів із серцевою недостатністю і порушеннями внутрішньошлуночкової провідності". Ukrainian Journal of Cardiology 32, n.º 2 (28 de abril de 2025): 54–66. https://doi.org/10.31928/2664-4479-2025.2.5466.

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Cardiac resynchronization therapy is an effective treatment method for patients with intraventricular conduction disturbances combined with heart failure and left ventricular systolic dysfunction. The mechanism of resynchronization therapy lies in restoring atrioventricular, intraventricular, and interventricular synchrony, which leads to coordinated ventricular function and improvement in ventricular systolic performance. There are two main methods of resynchronization therapy: biventricular pacing and conduction system pacing. Significant attention is being devoted to conduction system pacing, a relatively new technique that has shown promising results. By many criteria, conduction system pacing, particularly left bundle branch pacing, even surpasses biventricular pacing, which may significantly increase its importance in the near future. In some cases, to achieve better resynchronization effect, methods for resynchronization therapy optimization have been used. These methods involve simultaneous pacing in different loci, as well as the combination of biventricular pacing and conduction system pacing (LOT-CRT, HOT-CRT). This review analyzes the clinical aspects and features of both techniques, along with the advantages and disadvantages of each resynchronization approach.
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Schiavone, Marco, Roberto Arosio, Simone Valenza, Diego Ruggiero, Gianfranco Mitacchione, Leonida Lombardi, Maurizio Viecca y Giovanni Battista Forleo. "Cardiac resynchronization therapy: present and future". European Heart Journal Supplements 25, Supplement_C (26 de abril de 2023): C227—C233. http://dx.doi.org/10.1093/eurheartjsupp/suad046.

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Abstract Cardiac resynchronization therapy (CRT) via biventricular pacing (BVP) is a well-established therapy for patients with heart failure with reduced ejection fraction and left bundle branch block, who remain symptomatic despite optimal medical therapy. Despite the long-standing clinical evidence, as well as the familiarity of cardiac electrophysiologists with the implantation technique, CRT via BVP cannot be achieved or may result ineffective in up to one-third of the patients. Therefore, new alternative techniques, such as conduction system pacing and left ventricular pacing, are emerging as potential alternatives to this technique, not only in case of BVP failure, but also as a stand-alone first choice due to several potential advantages over traditional CRT. Specifically, due to its procedural characteristics, left bundle branch area pacing appears to be the most convincing technique, showing comparable efficacy outcomes when compared with traditional CRT, not increasing short-term device-related complications, as well as improving procedural times. However, transvenous leads remain a major limitation of all these pacing modalities. To overcome this limit, a leadless left ventricular endocardial pacing has been developed as an additional tool to achieve a left endocardial activation, although being still associated with non-negligible pitfalls, limiting its current use in clinical practice. This article focuses on the current state and latest progresses in cardiac resynchronization therapy.
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Pradip Kumar Ghoshal, Subhraprakash Pramanik, Tanmoy Kanti Goswami, Rajarshi Mondal, Arunava Biswas y Asish Biswas. "Dual versus conventional cardiac resynchronization: A pilot study". Asian Journal of Medical Sciences 15, n.º 7 (1 de julio de 2024): 68–73. https://doi.org/10.71152/ajms.v15i7.4086.

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Background: Systolic heart failure treatment now includes cardiac resynchronization therapy (CRT) as a necessary element. CRT has been shown to have advantageous impacts on mortality, hospitalization rates, and quality of life. Approximately 30% of patients fail to respond to traditional CRT implantation. Aims and Objectives: This study aimed to compare the outcome of dual resynchronization by placing the right ventricular pacing lead at His bundle or left bundle branch area against conventional CRT. Materials and Methods: This longitudinal follow-up study of a total of 35 patients undergoing CRT device placement for assessment of safety, efficacy, and feasibility of the procedure and post-procedural complications and correlation with parameters obtained from electrocardiogram and echocardiography parameters in a tertiary care set up in India. Results: Among this matched population (mean age 64 years) there was a higher responder rate with the newer technique of dual resynchronization compared to conventional CRT (83% vs. 70%). Conclusion: Dual resynchronization therapy is feasible and safe and provides better electrical resynchronization compared to conventional CRT and could be a better alternative, especially when suboptimal electrical resynchronization is obtained.
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Pradip Kumar Ghoshal, Subhraprakash Pramanik, Tanmoy Kanti Goswami, Rajarshi Mondal, Arunava Biswas y Asish Biswas. "Dual versus conventional cardiac resynchronization: A pilot study". Asian Journal of Medical Sciences 15, n.º 7 (1 de julio de 2024): 68–73. http://dx.doi.org/10.3126/ajms.v15i7.65304.

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Background: Systolic heart failure treatment now includes cardiac resynchronization therapy (CRT) as a necessary element. CRT has been shown to have advantageous impacts on mortality, hospitalization rates, and quality of life. Approximately 30% of patients fail to respond to traditional CRT implantation. Aims and Objectives: This study aimed to compare the outcome of dual resynchronization by placing the right ventricular pacing lead at His bundle or left bundle branch area against conventional CRT. Materials and Methods: This longitudinal follow-up study of a total of 35 patients undergoing CRT device placement for assessment of safety, efficacy, and feasibility of the procedure and post-procedural complications and correlation with parameters obtained from electrocardiogram and echocardiography parameters in a tertiary care set up in India. Results: Among this matched population (mean age 64 years) there was a higher responder rate with the newer technique of dual resynchronization compared to conventional CRT (83% vs. 70%). Conclusion: Dual resynchronization therapy is feasible and safe and provides better electrical resynchronization compared to conventional CRT and could be a better alternative, especially when suboptimal electrical resynchronization is obtained.
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Droghetti, A., M. C. Bottoli, M. Ragusa, P. Pepi, M. Giovanardi, A. Reggiani, D. Pozzetti, M. Malacrida, A. Colombo y G. Muriana. "Minimally invasive thoracoscopic technique for cardiac resynchronization therapy". Multimedia Manual of Cardio-Thoracic Surgery 2015 (17 de junio de 2015): mmv008. http://dx.doi.org/10.1093/mmcts/mmv008.

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Maass, Alexander H., Fenna Daniëls, Eva Roseboom, Kevin Vernooy y Michiel Rienstra. "Special Issue: Latest Advances in Delivery and Outcomes of Cardiac Resynchronization Therapy and Conduction System Pacing". Journal of Clinical Medicine 12, n.º 10 (14 de mayo de 2023): 3453. http://dx.doi.org/10.3390/jcm12103453.

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Imnadze, Guram, Khaled Awad, Wolfgang Kranig y Irakli Giorgberidze. "Modified Pull-Through Technique for Cardiac Resynchronization Therapy Upgrades in Patients with Occluded Access Veins". Texas Heart Institute Journal 47, n.º 1 (1 de febrero de 2020): 23–26. http://dx.doi.org/10.14503/thij-18-6713.

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The number of procedures for upgrading implantable devices for cardiac resynchronization therapy has increased considerably during the last decade. A major challenge that operators face in these circumstances is occlusion of the access vein. We have modified a pull-through method to overcome this obstacle. Six consecutive patients with occluded access veins and well-developed collateral networks underwent a procedure in which the occluded vein was recanalized by snaring the existing atrial lead via transfemoral access. Upgrading the device was successful in all patients; none had intraprocedural complications. Our experience shows that our modified pull-through technique may be a feasible alternative for upgrading cardiac resynchronization therapy in patients with venous occlusion.
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Chan, Ngai Yin y Ying Keung Lo. "Impacted left ventricular lead technique in cardiac resynchronization therapy". EP Europace 9, n.º 7 (23 de mayo de 2007): 531–32. http://dx.doi.org/10.1093/europace/eum084.

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Lu, Wei-Da y Ju-Yi Chen. "Proposed treatment algorithm for cardiac device-related subclavian vein stenosis: a case series". European Heart Journal - Case Reports 4, n.º 1 (20 de enero de 2020): 1–6. http://dx.doi.org/10.1093/ehjcr/ytz245.

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Abstract Background Subclavian vein obstruction may occur in patients with pacemaker leads, which may make the implantation of new pacemaker leads difficult. Case summary We report two cases in which upgrading to cardiac resynchronization therapy pacemaker was challenging due to total central vein occlusion. In the first case, a 78-year-old woman with permanent pacemaker implantation, 5 years ago, was successfully treated by balloon venoplasty. In the second case, balloon venoplasty was unsuccessful in a 46-year-old woman who has received twice single-chamber implantable cardioverter-defibrillator, 12 years and 5 years ago, due to vessel crowding, so a contralateral side puncture, along with a tunnel technique, was performed to solve this problem. Discussion Cardiac implantable electronic device-related subclavian vein stenosis can present a challenge to common cardiac resynchronization therapy device upgrades in the absence of appropriate techniques.
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Karki, Saurab, Pallavi Lakra, Kaushik Kumar y Shiavax J. Rao. "Conduction System Pacing for Cardiac Resynchronization Therapy in Heart Failure with Reduced Ejection Fraction". Journal of Clinical Medicine 14, n.º 3 (30 de enero de 2025): 917. https://doi.org/10.3390/jcm14030917.

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Most patients with heart failure exhibit ventricular dyssynchrony, which is addressed by cardiac resynchronization therapy, traditionally through the use of biventricular pacing (BVP) devices. Despite this, around 30% of patients do not achieve the desired clinical outcome, and echocardiographic findings show that some patients deteriorate even further. Conduction system pacing (CSP) is a more physiologic pacing technique and includes his-bundle pacing (HBP) and left bundle branch area pacing (LBBAP). In this review, we further discuss and compare various CSP techniques for cardiac resynchronization therapy in patients with heart failure with reduced ejection fraction. After analyzing the current state of the literature on this topic until 2023, eight studies were included in this review and consisted of two trials and five observational studies with a total of 2841 patients. Both BVP and CSP resulted in improved outcomes in terms of NYHA class, QRS duration, and left ventricular ejection fraction over time. These effects were more pronounced in patients undergoing CSP, as the technique is more physiological and results in the synchronized activation of the ventricles. LBBAP yielded better outcomes compared to BVP and resulted in fewer heart failure hospitalizations and a lower all-cause mortality rate.
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Tesis sobre el tema "Resynchronization technique"

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Bouchakour, Omar. "Contrôle-santé structurel passif à ondes guidées, basé sur des réseaux de capteurs ultrasonores désynchronisés". Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2025. http://www.theses.fr/2025UPHF0004.

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L'évolution de la surveillance de l'état des structures (SHM) au cours des dernières années a vu émerger des réseaux de capteurs indépendants à faibles ressources matérielles. Cependant, les signaux enregistrés par ces capteurs pour faire de l'imagerie passive peuvent présenter des désynchronisations qui rendent difficile la localisation des endommagements dans la structure inspectée. Bien que la technique de pic de corrélation (PCT), reposant sur la symétrie des fonctions de corrélation de bruit, puisse être appliquée pour corriger ces décalages, une synchronisation parfaite est difficile à atteindre en présence de bruit électronique et/ou de reconstruction de la fonction de Green. Dans ce manuscrit, une étude du comportement des erreurs résiduelles liées à une resynchronisation imparfaite, en fonction des paramètres statistiques du bruit, est menée. Puis, la dégradation du contraste des images de localisation des défauts est quantifiée en fonction de l'écart type de ces erreurs de resynchronisation. Par la suite, un processus basé sur la pseudo-inversion de Moore-Penrose est développé pour minimiser ces erreurs et améliorer la qualité des images de localisation. Cette étude est ensuite étendue au cas de la localisation de défauts à diffusion anisotrope. Enfin, une étude de faisabilité est effectuée sur un réseau de capteurs communicants sans fil
The evolution of structural health monitoring (SHM) in recent years has witnessed the emergence of independent sensor networks with limited material resources. However, the signals recorded by these sensors for passive imaging can exhibit desynchronizations that make it difficult to locate damage in the inspected structure. Although the peak correlation technique (PCT), based on the symmetry of noise correlation functions, can be applied to correct these offsets, achieving perfect synchronization is challenging in the presence of electronic noise and/or reconstruction of the Green's function. In this manuscript, a study of the behavior of residual errors associated with imperfect resynchronization, as a function of the statistical parameters of noise, is conducted. Then, the degradation of the contrast of defect localization images is quantified as a function of the standard deviation of these resynchronization errors. Subsequently, a process based on the Moore-Penrose pseudo-inversion is developed to minimize these errors and improve the quality of the localization images. This study is then extended to the case of defect localization with anisotropic scattering. Finally, a feasibility study is carried out on a network of wireless communicating sensors
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Albezzawy, Muhammad Nabil Mustafa. "Advanced signal processing methods for source identification using references". Electronic Thesis or Diss., Lyon, INSA, 2024. http://www.theses.fr/2024ISAL0074.

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Les techniques de référence à rang réduit sont couramment employées pour résoudre les problèmes d’extraction de source et de resynchronisation de champs physiques, lorsque le nombre de références dépasse celui des sources incohérentes. Dans ce cas, la matrice croisée-spectrale devient mal conditionnée, rendant la solution des moindres carrés invalide. Bien que la décomposition en valeurs singulières tronquée (DVST) soit utilisée pour résoudre ce problème, elle n'est valable que pour un bruit scalaire sur les références. De plus, il est difficile de définir un seuil de troncature lorsque les valeurs singulières diminuent progressivement. Cette thèse propose une solution nommée technique de référence maximale-coherent (RMC), basée sur la recherche d’un ensemble de références virtuelles maximales correlées avec les mesures de champ. Cette technique est optimale, surtout en présence d’un bruit corrélé sur la référence. Cependant, elle nécessite également une troncature des valeurs propres, exigeant la connaissance ou l’estimation préalable du nombre de sources incohérentes, un problème inverse mal posé et peu étudié. La thèse présente trois méthodes d’énumération de sources applicables à toutes les techniques de référence : un test du rapport de vraisemblance contre le modèle saturé, une technique de bootstrap paramétrique et une approche de validation croisée. Une étude comparative basée sur des données numériques et expérimentales montre deux résultats importants. D'abord, le nombre de fenêtres spectrales utilisées affecte grandement la performance des trois méthodes, qui se comportent différemment selon ce nombre. Ensuite, le bootstrap paramétrique s’avère être la meilleure méthode en termes de précision et de robustesse par rapport au nombre de fenêtres utilisées. Enfin, la technique RMC accompagnée de bootstrap a été utilisée pour l’extraction de source et la resynchronisation de données réelles provenant d’expériences en laboratoire et d’un moteur électrique, fournissant de meilleurs résultats que la solution des moindres carrés et la DVST dans les mêmes conditions
Rank-reduced reference/coherence techniques based on the use of references, i.e. fixed sensors, are widely used to solve the two equivalent problems of source extraction and resynchronization encountered during remote sensing of physical fields, when the number of references surpasses the number of incoherent sources. In such case, the cross-spectral matrix (CSM) becomes ill-conditioned, resulting in the invalidity of the least squares LS solution. Although the truncated singular value decomposition (TSVD) was successfully applied in the literature to solve this problem, its validity is limited only to the case of scalar noise on the references. It is also very difficult to define a threshold, for truncation, when the singular values are gradually decreasing. This thesis proposes a solution based on finding a set of virtual references that is maximally correlated with the field measurements, named the maximally-coherent reference (MCR) Technique. This solution is optimal, especially, in the case of correlated noise on the reference, where TSVD fails. However the technique also includes an eigenvalue truncation step, similar to the one required for the TSVD, which necessitates a priori knowledge or the estimation of the number of incoherent sources, i.e. source enumeration, which is an ill-posed inverse problem, insufficiently investigated in the literature within the framework of reference techniques. In this thesis, after providing a unified formalism for all the reference techniques in the literature, three alternative source enumeration methods, applicable to all the reference techniques, were presented namely; a direct likelihood ratio test (LRT) against the saturated model, a parametric bootstrap technique and a cross-validation approach. A comparative study is performed among the three methods, based on simulated numerical data, real sound experimental data, and real electrical motor data. The results showed two important outcomes. The first is that the number of snapshots (spectral windows), used in the spectral analysis, greatly affects the performance of the three methods, and that, they behave differently for the same number of used snapshots. The second is that parametric bootstrapping turned out to be the best method in terms of both estimation accuracy and robustness with regard to the used number of snapshots. Finally, the MCR technique accompanied with bootstrapping was employed for source extraction and resynchronization of real data from laboratory experiments, and an e-motor, and it returned better results than the LS solution and the TSVD when employed for the same purpose
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Hawkins, Rodney J. "EPICARDIAL WIRELESS PACEMAKER FOR IMPROVED LEFT VENTRICULAR RESYNCHRONIZATION (CONCEPTUAL DESIGN)". DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/431.

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The human body is a well tuned mechanism where systems work in synergy to provide a healthy quality of life. The human circulatory system transports oxygenated blood from the heart to the rest of the body delivering the proper nutrients for cells to function. When the heart malfunctions, serious complications can arise leading to sudden cardiac arrest. Congestive heart failure (CHF) is one heart disease that affects the synchrony of the heart’s ventricles. Cardiac resynchronization therapy (CRT) has been widely accepted as a treatment for CHF. Similar to traditional dual chamber pacing techniques, CRT adds a pacing lead to stimulate the left ventricle. Left ventricular leads are implanted via the coronary sinus which provides the easiest surgical access to the left ventricle. Another option for LV pacing is by using an epicardial lead. This option has proven to be safe and effective but requires major surgery. An epicardial lead is usually implanted by performing a thoracotomy. Many studies have been done to show the benefits of bi-ventricular pacing, therefore developing new methods to gain LV access safely and reliable are highly desirable. The epicardial satellite pacemaker, or EPI pacemaker, is a component of a larger CRT system. This implantable cardiac system is composed of a master pacing unit with leads and a remote satellite pacing unit. The master unit is a traditional CRT device electrically coupled to the right side of the heart. It controls the right atrium and ventricle via transvenous leads anchored to the endocardium of the heart. The master device generates the pacing pulses to stimulate the right atrium and right ventricle and a communications module to transmit pacing commands to the epicardial satellite device. The epicardial satellite pacemaker is a leadless device mounted directly on the epicardium of the left ventricle. The epicardial pacemaker can be implanted using a thoracoscopic procedure during implant of the master unit. In special events, it can be implanted using prophylactic techniques during heart bypass surgery of other surgical procedures where access to the heart is available. Much work needs to be done to prove the technology. But current RF communication capabilities in today’s devices offer the groundbreaking path to develop a satellite LV pacing design.
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4

Courtial, Nicolas. "Fusion d’images multimodales pour l’assistance de procédures d’électrophysiologie cardiaque". Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S015.

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Les procédures d’électrophysiologie cardiaque ont démontré leur efficacité pour la suppression de symptômes d’arythmie et d’insuffisance cardiaque. Leur taux de succès dépend de la bonne connaissance de l’état du cœur du patient, en termes de conductivité électrique, de qualité tissulaire, et de propriétés mécaniques. Cette intégration d’informations est un enjeu clinique majeur pour ces thérapies. Cette thèse porte sur le développement et l’exploitation de modèles multimodaux spécifiques au patient, pour la planification et l’assistance de l’ablation par radiofréquences (ARF) et de la thérapie de resynchronisation cardiaque (CRT). Des méthodes de segmentation, de recalage et de fusion d’informations multimodales ont dans un premier temps été établies pour la création de ces modèles, permettant de planifier ces procédures. Puis, des approches spécifiques à chacune ont été mises en œuvre pour intégrer ces modèles dans le bloc opératoire, pour assister le geste clinique. Enfin, une analyse postopératoire a permis la synthèse d’un nouveau descripteur multimodal, visant à prédire la réponse de la CRT suivant le site choisi de stimulation du ventricule gauche. Ces études ont été appliquées et validées pour des patients candidats à la CRT et à l’ARF. Elles ont montré la faisabilité et l’intérêt d’intégrer ces modèles multimodaux dans le workflow clinique pour l’assistance à ces gestes interventionnels
Cardiac electrophysiology procedures have been proved to be efficient to suppress arrythmia and heart failure symptoms. Their success rate depends on patient’s heart condition’s knowledge, including electrical and mechanical functions and tissular quality. It is a major clinical concern for these therapies. This work focuses on the development of specific patient multimodal model to plan and assist radio-frequency ablation (RFA) and cardiac resynchronization therapy (CRT). First, segmentation, registration and fusion methods have been developped to create these models, allowing to plan these interventional procedures. For each therapy, specific means of integration within surgical room have been established, for assistance purposes. Finally, a new multimodal descriptor has been synthesized during a post-procedure analysis, aiming to predict the CRT’s response depending on the left ventricular stimulation site. These studies have been applied and validated on patients candidate to CRT and ARF. They showed the feasibility and interest of integrating such multimodal models in the clinical workflow to assist these procedures
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Libros sobre el tema "Resynchronization technique"

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Timperley, Jonathan, Paul Leeson, Andrew RJ Mitchell y Timothy Betts, eds. Oxford Specialist Handbook of Pacemakers and ICDs 2e. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199687831.001.0001.

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The Oxford Specialist Handbook of Pacemakers and ICDs is a comprehensive but concise training guide on how to implant, follow-up, and troubleshoot pacemakers and ICDs. This title has been updated from the previous edition to include new technologies such as subcutaneous ICDs and MRI compatible devices. Guidelines and management strategies are described. The title covers the principles, programming, potential complications, and troubleshooting techniques for pacemakers, ICDs, and cardiac resynchronization therapy. It includes over 120 figures, including X-rays and annotated ECGs to demonstrate pacing techniques. Patient education and follow-up management techniques are covered, including frequently asked questions and driving regulations for different classes of licence.
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Soman, Prem. Radionuclide Imaging in Heart Failure. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199392094.003.0027.

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Heart Failure is a clinical syndrome characterized by symptoms and signs of systemic or pulmonary congestion, associated with elevated intracardiac filling pressures. The structural and functional abnormalities of the myocardium which characterize the heart failure state can be explored by various imaging approaches. Hence cardiac imaging plays an integral part in the evaluation the heart failure patient. Radionuclide imaging techniques may be uniquely suited to address several important clinical questions in heart failure related to etiology, the quantification and serial evaluation of LV function, and the selection of patients for therapies including coronary revascularization, implantable cardioverter-defibrillators (ICD) and cardiac resynchronization therapy (CRT).
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Chen, Ji. Phase Analysis for Dyssynchrony by MPI and MUGA. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199392094.003.0022.

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Fourier phase analysis can be used to assess dyssynchrony from nuclear images, such as multi-gated acquisition (MUGA) radionuclide angiography, gated blood-pool SPECT, and gated SPECT myocardial perfusion imaging. This chapter reviews the technical background of Fourier phase analysis with these imaging modalities and demonstrates how it measures ventricular dyssynchrony. The major clinical application of ventricular dyssynchrony assessment is to improve response to cardiac resynchronization (CRT) in patients with heart failure. This chapter introduces the current practice of CRT and the potential factors related to CRT response, and then reviews the clinical studies of the above phase analysis techniques for increasing CRT response.
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Voigt, Jens Uwe, Peter Søgaard y Emer Joyce. Heart failure: left ventricular dyssynchrony. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198726012.003.0026.

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Echocardiography plays a pivotal role in the management of patients with dilative cardiomyopathy and conduction disease, particularly in the setting of cardiac resynchronization therapy (CRT). Current CRT guidelines recommend the echocardiographic assessment of left ventricular size and function. Furthermore, echocardiography has the potential of analysing regional myocardial mechanics with high temporal resolution and without radiation burden or danger for the patient. Assessment of left ventricular dyssynchrony has therefore become the next challenge. Besides the visual approaches, newer methods of functional imaging such as tissue Doppler and speckle tracking allow the exact quantification of regional myocardial function. This chapter reviews the current status of left ventricular dyssynchrony assessment by echocardiography and introduces emerging techniques which can better link conduction abnormalities and mechanical events and, thus, potentially improve clinical decision-making in this field.
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Daoud, Emile G. y Steven J. Kalbfleisch. Color Atlas and Synopsis of Electrophysiology. McGraw-Hill Education / Medical, 2015.

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Capítulos de libros sobre el tema "Resynchronization technique"

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Madhavan, Malini, Samuel J. Asirvatham, Matthew J. Swale, David L. Hayes y Paul A. Friedman. "Implanting and Extracting Cardiac Devices: Technique and Avoiding Complications". En Cardiac Pacing, Defibrillation and Resynchronization, 157–217. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118483923.ch5.

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Lewandowska, Magdalena, J. Wtorek y L. Mierzejewski. "An applicability of Impedance Technique in evaluation of cardiac resynchronization therapy". En IFMBE Proceedings, 2571–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89208-3_617.

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Darciuc, Radu. "Cardiac Resynchronization Therapy Devices Implantation Technique". En From Supraventricular Tachycardias to Cardiac Resynchronization Therapy [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1005119.

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This chapter describes the most important technical aspects of the cardiac resynchronization therapy device implantation. It includes the technique of anesthesia, venous access, pocket creation, coronary sinus cannulation, left ventricular lead placement, etc. The description of the necessary tools is made to help implanting physicians become familiar with and overcome possible challenges during the procedure. We compare several techniques for every step, underlining their advantages and disadvantages. We mention a list of tip and tricks that will help physicians perform implantations and become more proficient. Numerous figures and images are used to make the explanation of the technique more comprehensive.
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Gimelli, Alessia y Riccardo Liga. "Imaging Dyssynchrony". En Nuclear Cardiac Imaging, editado por Ami E. Iskandrian y Fadi G. Hage, 425–44. 6a ed. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/med/9780190095659.003.0020.

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Abstract In recent decades, the evaluation of cardiac mechanical dyssynchrony has gained increasing relevance, with solid evidence demonstrating the highly negative impact of asynchronous mechanical activation on cardiac dynamics and, ultimately, patient prognosis. In this context, cardiac resynchronization therapy has been demonstrated as a lifesaving therapy in patients with heart failure and cardiac dyssynchrony. Phase analysis on nuclear cardiac imaging offers the chance to assess the presence and quantify the extent of mechanical dyssynchrony, allowing the selection of patients who would likely benefit from cardiac resynchronization therapy by identifying the region of latest mechanical activation where the pacing lead should be positioned. The present chapter will describe the possible use of nuclear cardiac imaging for the evaluation of cardiac mechanical dyssynchrony, outlining the methodologic background as well as the advantages and limitations of each technique.
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Gimelli, Alessia y Riccardo Liga. "Imaging Dyssynchrony". En Nuclear Cardiac Imaging Companion Atlas, 96–103. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/med/9780197521434.003.0020.

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Abstract In recent decades, the evaluation of cardiac mechanical dyssynchrony has gained increasing relevance, with solid evidence demonstrating the highly negative impact of asynchronous mechanical activation on cardiac dynamics and, ultimately, patient prognosis. In this context, cardiac resynchronization therapy has been demonstrated as a lifesaving therapy in patients with heart failure and cardiac dyssynchrony. Phase analysis on nuclear cardiac imaging offers the chance to assess the presence and quantify the extent of mechanical dyssynchrony, allowing the selection of patients who would likely benefit from cardiac resynchronization therapy by identifying the region of latest mechanical activation where the pacing lead should be positioned. The present chapter will describe the possible use of nuclear cardiac imaging for the evaluation of cardiac mechanical dyssynchrony, outlining the methodologic background as well as the advantages and limitations of each technique.
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Furon, Teddy, François Cayre y Caroline Fontaine. "Watermarking Security". En Digital Audio Watermarking Techniques and Technologies, 278–99. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-513-9.ch014.

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Digital watermarking studies have always been driven by the improvement of robustness. Most of articles of this field deal with this criterion, presenting more and more impressive experimental assessments. Some key events in this quest are the use of spread spectrum, the invention of resynchronization schemes, the discovery of side information channel, and the formulation of the embedding and attacking strategies as a game. On the contrary, security received little attention in the watermarking community. This chapter presents a comprehensive overview of this recent concept. We list the typical applications which require a secure watermarking technique. For each context, a threat analysis is purposed. This presentation allows us to illustrate all the certainties the community has on the subject, browsing all key papers. The end of the paper is devoted to what remains not clear, intuitions and future trends.
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Jackson, Kevin P., Robert K. Lewis, Kenneth A. Ellenbogen y Seth J. Worley. "Interventional Techniques for Device Implantation". En Clinical Cardiac Pacing, Defibrillation and Resynchronization Therapy, 841–901. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-323-37804-8.00032-8.

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Worley, Seth J. y Kenneth A. Ellenbogen. "Interventional Techniques for Device Implantation". En Clinical Cardiac Pacing, Defibrillation and Resynchronization Therapy, 618–718. Elsevier, 2011. http://dx.doi.org/10.1016/b978-1-4377-1616-0.00023-0.

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Wazni, Oussama y Bruce L. Wilkoff. "Techniques and Devices for Lead Extraction". En Clinical Cardiac Pacing, Defibrillation and Resynchronization Therapy, 747–70. Elsevier, 2011. http://dx.doi.org/10.1016/b978-1-4377-1616-0.00026-6.

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GILLIS, ANNE M. "Pacing for Sinus Node Disease: Indications, Techniques, and Clinical Trials". En Clinical Cardiac Pacing, Defibrillation, and Resynchronization Therapy, 407–27. Elsevier, 2007. http://dx.doi.org/10.1016/b978-1-4160-2536-8.50018-2.

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Actas de conferencias sobre el tema "Resynchronization technique"

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Kijshevavithaya, Nuttakit y Surapong Suwankawin. "An Enabling Resynchronization Technique for Grid-Connected Voltage-Source Converters". En 2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON). IEEE, 2021. http://dx.doi.org/10.1109/ecti-con51831.2021.9454681.

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Heuring, Vincent P. y Valentin N. Morozov. "Synchronizing and Controlling Fast Digital Optical Processors". En Optical Computing. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/optcomp.1993.owe.15.

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This paper discusses techniques for synchronizing and controlling fast digital optical and optoelectronic processors. When optical processors require significant amounts of control for proper operation, designers have traditionally resorted to electronic host computers. Such approaches are often inadequate because of high host computer cost, or the need for speed that an electronic host computer cannot deliver. We discuss how to design controllers in the optical or optoelectronic domain. Since data and control pulses must arrive in synchronization at all interaction points, system timing and resynchronization are discussed as the major problems to be solved in designing such systems. We present solutions to the problems of timing and resynchronizing high speed optical processors in the context of two system timing paradigms: the gate and strobe paradigm and the more recent time-of-flight paradigm. Gate and strobe designs are synchronized by gating the data pulses from storage element to storage element. Time of flight systems can be synchronized by pulse reshaping: resynchronization of the weakening pulse by retiming its leading and trailing edges and by clock gating: gating a fresh copy of the master clock signal to replace a weakening signal pulse.
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Fernandez, Carlos L., Andrea Basso y Jean-Pierre Hubaux. "Error concealment and early resynchronization techniques for MPEG-2 video streams damaged by transmission over ATM networks". En Electronic Imaging: Science & Technology, editado por Vasudev Bhaskaran, Frans Sijstermans y Sethuraman Panchanathan. SPIE, 1996. http://dx.doi.org/10.1117/12.235432.

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