Dissertations / Theses on the topic 'Ekokardiografi'
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Alishah-Ali, Honey. "VISUELL OCH SEMIAUTO-MATISK BEDÖMNING AV VÄNSTERKAMMARENS EJEKTIONSFRAKTION VID EKOKARDIOGRAFI." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26849.
Full textThe most commonly used method to examine the heart’s morphology, anatomy and function within clinical context is 2-dimensional echocardiography.When assessing the heart’s global systolic ventricular function and wall mobility the left ventricular ejection fraction (LVEF) is utilized. To aid with the visual assessment, semi-automatic measurements and calculations are often used. These computerized methods automatically measure the heart volume using the reference point’s outline at the endocardium. The aim of this study is to compare a semi-automatic LVEF-assessment method, automated 2D cardiac quantification (a2DQ), to visually assessed LVEF using transthoracic echocardiography. Recorded ultrasound sequences from 50 previously performed ultrasound studies were included in the study. Patients with arrhythmias such as atrial fibrillation were excluded. In the study, an estimated LVEF obtained with the semiautomatic method a2DQ was compared to a visually evaluated LVEF performed by experienced examiner. LVEF was initially compared to> 55% <55% for the two methods. In addition, further comparison was made according to the following criteria> 55%, 45-54%, 30-44% and <30%. Kappa analysis related to the initial assessment showed moderate consistency (k = 0.47). Corresponding analysis made on the categorized criteria obtained a kappa coefficient of 0.41. The visual assessment gives higher LVEF in this study.The study suggests that a2DQ is a less appropriate method as it underestimates LVEF and should not be recommended as support for inexperienced examiners.
Kochai, Fahrie. "Jämförelse av ejektionsfraktion vid myokardscintigrafi i vila (GSPECT) och 2D ekokardiografi." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26266.
Full textEjection fraction (EF) is a measure of the global systolic left chamber function. EF is a significant parameter for the systolic left ventricle function since therapeutic and prognostic conclusions are based on the left chamber ejection fraction. EF is normally ≥ 55% of the end-diastolic volume. Left ventricle ejection fraction can be determined non-invasively by 2D echocardiography (2D – ECHO) and gated single photon emission computed tomography. Based on 2D echocardiography (2D-ECHO), EF was obtained using the biplane Simpson method applied in four-chamber view and two- chamber views in both end diastole and end systole. With myocardial perfusion (GSPECT), EF values were obtained based on the QPS- and QGS- images after an automatic orientation of endocarditis contours were carried out by Hermes Medical solution. The purpose of this report was to see if there is a significant difference in (EF) between (GSPECT) and (2D-ECHO) at rest. The study included 30 participants. EF values were attained by licensed biomedical scientist. Participants' data were de-characterized and obtained from previously performed Echocardiography (2D-ECHO) and myocardial perfusion (GSPECT) at rest examination at intervals of no more than 6 months. The outcomes of the study showed (p=0.000) <0.1% and (r = 0.65) thus representing a strong and significant correlation, however there is a lack of consistency between the methods based on the scattering chart that gives (r^2 = 0.42). Bland Altman's illustration state that a good correlation between the methods exists and so does standard deviation for 2D-ECHO and Myocardial perfusion (GSPECT) as demonstrated (50.1±10.8) and (49.1±15.1) respectively. The study showed good overall correlations between EF derived from (2D ECHO) and Myocardial perfusion (GSPECT). In conclusion, the statistics demonstrated that the methods are comparable to each other when measuring EF.
Dahl, Julia, and Lisa Olander. "Bestämning av ejektionsfraktion i vila med ekokardiografi och myokardscintigrafi : En metodjämförelse." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36286.
Full textHassan, Hamda, and Magdalena Klos-Piontek. "JÄMFÖRELSE AV MANUELL- OCHAUTOMATISK MÄTNINGAV SLAGLÄNGDEN ÖVERVÄNSTRA KAMMARENS UTFLÖDESTRAKTI TVÅDIMENSIONELL EKOKARDIOGRAFI." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-30631.
Full textHugh, Henry. "ERFARENHETENS BETYDELSE VID BESTÄMNING AV VÄNSTERKAMMARVOLYMER OCH EJEKTIONSFRAKTION MED 2D- OCH 3D-EKOKARDIOGRAFI." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-24166.
Full textThe left ventricular ejection fraction (EF) is a measurement of how much of the end-diastolic ventricular volume is ejected during systole. EF, specified in percent, is mainly used to evaluate the left ventricular global systolic function and is calculated with the end-diastolic volume (EDV) and the end-systolic volume (ESV). Two-dimensional echocardiography (2DE) is currently the most commonly used imaging method for the assessment of the left ventricular volumes and EF, along with Simpson’s biplane. The combination of 2DE requiring good level of experience to achieve optimal image acquisition and Simpson’s geometric assumptions of the left ventricular shape could prove to be problematic, especially in patients with abnormal left ventricular shape. The introduction of three-dimensional echocardiography (3DE) has made it possible to avoid the geometric assumptions due to the pyramidal data acquisition. At the same time the method is also considered to be much more user-friendly. The aim of this study is to investigate if the sonographer’s experience is of importance when assessing EDV, ESV and EF of the left ventricle using both imaging methods. The study included 20 participants with normal and abnormal left ventricular systolic function but did not include atrial fibrillation and flutter, arrhythmia, pacemakers and patients with the inability to hold their breath. The participants underwent a modified echocardiographic examination and the image acquisitions were performed by an experienced sonographer. The measurements were performed by the same experienced sonographer and by an inexperienced one. The results of this study showed a significant difference only for EF with 2DE between the sonographers (p = 0,03) as well as a non-significant correlation (r = 0,267, p = 0,255). The Bland-Altman analyses, however, showed good level of agreement for all measurements. Consequently, this study has shown that experience is of importance when assessing EF with 2DE, but not with 3DE.
Göransson, Lizette, and Filippa Fredlund. "En jämförelse mellan mättekniker för högerkammarbedömning vid ekokardiografi : Överensstämmelse mellan s´ och TAPSE." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-35877.
Full textThe assessment of right ventricular systolic function is done by echocardiography, with techniques as twodimensional echocardiography, motion-mode (M-mode) and Tissue Doppler Imaging (TDI). Measurements obtained from these techniques are Tricuspid Annular Plane Systolic Excursion (TAPSE) and s`. TAPSE describes the longitudinal movement of annulus tricuspidalis. s´ describes annulus tricuspidalis maximal systolic velocity. The purpose of this essay was to explore the relationship between TAPSE and s´. The study consists of 99 participants between the ages of 18 and 90. The population was consisted of individuals with or without cardiovascular disease, but not individuals with atrial fibrillation. Participants were investigated with transthorakal echocardiography (TTE) at Länssjukhuset Ryhov in Jönköping. At the examination both TAPSE and s´ was measured. McNemar's test was performed and a Kappa value was calculated. The result showed a significant difference and the Kappa value was low which indicates a low relationship between the variables. The outcome of the study shows that several participants are classified with normal right ventricular function measured with TAPSE, but the same individuals are classified with right ventricular dysfunction measured by s'. The reason for the poor relationship between the parameters is unknown and should be studied further in future studies.
Baker, Sinan, and Odai Alcharif. "Ekokardiografi: jämförelse av erfarenhetens betydelse vid mätningar av strain och strain rate i vänster kammare." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44342.
Full textBackground: Echocardiography has a major role for assessment of the left ventricle. By using segmental and global longitudinal strain and strain rate both regional and global kinetics can be assessed. Segmental strain measures deformation of the myocardium as strain rate measures the velocity of the deformation. By summing the average from all segments, global longitudinal strain is obtained. Purpose: To compare heart ultrasound-based segmental and global strain and strain rate in the left ventricle. Comparisons have been made between experienced biomedical laboratory scientist and less experienced biomedical laboratory scientist’s students. Method: Quantitative study were 10 test subjects have been examined echocardiographically. Imaging and measurements were collected with Siemens Acuson SC2000. Compilation of collected measurements were made on Microsoft Excel and Microsoft Word in charts and tables. For comparison of segmental and global strain and strain rate the analysis method Related-Samples Wilcoxon Signed Rank Test were used. Result: The result shows only one statistically significant difference (p <0.05) of segmental strain in the basal segments of apical projections between experienced biomedical laboratory scientist and student 1. Conclusion: The data material is not enough to generalize the result to a larger population. Further studies are needed to draw a more secure conclusion.
Lindelöf, Linnea. "Bedömning av etiologi till mitralisinsufficiens med 2DTEE vs. 3DTEE : En jämförande studie mellan oerfaren och erfaren ekokardiograför." Thesis, Umeå universitet, Biomedicinsk laboratorievetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-103672.
Full textErlandsson, Gabrielle, and Karin Johansson. "En jämförelse mellan transthorakal och transesofageal ekokardiografi : Metod att föredra vid undersökning av Staphylococcus aureus-endokardit." Thesis, Högskolan i Jönköping, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40083.
Full textThe purpose was to compare how transthoracic (TTE) and transesophageal echocardiography (TEE) complement each other in the diagnosis of Staphylococcus Aureus (S. aureus)-Endocarditis (SAE). S. aureus is one of the leading bacteria in health-related infections. SAE becomes more common, which researchers associate with more invasive interventions. TTE is a first step to confirm or rule out endocarditis and often followed by TEE-examination. At Skaraborg Hospital in Skövde (SkaS), the TEE-survey is considered unnecessary many times when not finding enough endocarditis. The study was a comparative study with quantitative approach, where the material was collected at clinical physiological laboratory at SkaS, Skövde, which resulted in eleven participants. Both sexes were included, patients below 18 years were excluded. Results showed that four endocarditis was diagnosed. Streptococcus Sanguinus was the bacterium that caused most endocarditis while S. aureus did not cause endocarditis. Five of eleven patients had some form of risk factor for endocarditis. Five of eleven patients were positive for S. aureus. Hygiene at the examinations, especially TEE is important because 80 % of healthcare professionals could be carriers of S. aureus. The TTE and TEE survey complement each other. Carrying out the surveys together is what makes the diagnosis safe.
Lam, Cecilia. "Jämförelse av global longitudinell strain mellan två ekokardiografiska mjukvaruprogram." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-25721.
Full textEchocardiography is today the dominant examination method for studying the heart. Echocardiography can with help of ultrasound provide an image of the heart from various projections that can either be saved as still images or moving sequences. Ultrasound of the heart is a non-invasive technique that can be performed quickly and thus causes no discomfort to the patient. Global longitudinal strain (GLS) is a common measure in echocardiography. GLS is increasingly used in clinical practice to monitor treatment outcome and to detect early changes in the myocardium. The purpose of this study was to determine if there were any significant difference in the measurement values of GLS between two different software programs, EchoPac and TomTec. The study included 30 patients with sinus rhythm and good image quality. The Mann-Whitney U test showed a significant difference of P 0.042. The Bland-Altman diagram showed that all values, 30 in total, except of three, are within a 95% confidence interval. The conclusion is that there is a difference of GLS between the two software programs, based on this study. Analysis of GLS in the same patient should be performed with the same software program to minimize measurement errors as much as possible.
Zilic, Haris. "LONGITUDINELL VÄGGRÖRLIGHET I VÄNSTER KAMMARE SOM ETT MÅTT PÅ SYSTOLISK VÄNSTERKAMMARFUNKTION." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26351.
Full textLeft ventricular ejection fraction (LVEF) is one of the most com-mon and most significant parameters in today’s echocardiographic exams. LVEF is a measurement of the amount of end-diastolic ventricular volume which is ejected out during systole. Although, two-dimensional echocardiography (2DE) is the most common method to examine LVEF, other methods can be implemented with 2DE such as mitral annular plane systolic excursion (MAPSE) and speckle tracking. The study examines the relationship between the methods MAPSE, speckle tracking, and three-dimensional echocardiography (3DE) regarding the assessment of longitudinal wall movement in left ventricular and LVEF. Longitudinal wall movement in the left ventricular and LVEF was measured with the methods, 2D- speckle tracking, MAPSE and 3DE on 25 patients with different issues, which were referred for an echocardiographic exam. Results: Pearson’s rank correlations test indicates a significant correlation between the methods MAPSE and speckle tracking regarding the assessment longitudinal wall movement (r=0.415). Significant results were also obtained for the methods 3DE and 2DST regarding the assessment of LVEF with a Bland-Altman analysis (r=0.498). A significant correlation exists between MAPSE and 2DST regarding the assessment of longitudinal wall movement of the left ventricle. Regarding the assessment of LVEF, obtained results, indicate a significant difference.
Johansson, Robin, and Carl Werbelow. "Skillnad i mätsäkerhet av vänster förmaksvolym mellan tvådimensionell och tredimensionell ekokardiografi jämfört med magnetresonans tomografi : En litteraturstudie." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för naturvetenskap och biomedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-48935.
Full textEchocardiological examinations offer an easy, quick, and non-invasive method for diagnosing the left atrium volume (LAV). Cardiac magnetic resonance imaging (CMR) is currently the golden-standard method. However, CMR is time-consuming and costly. Instead two-dimensional echocardiography (2DE) modality is used. The relatively new three-dimensional echocardiography (3DE) method offers an interesting choice when assessing LAV. It’s the purpose of this study to plot 2DE against 3DE regarding LAV correlation and with CMR as reference. The study will examine the relationship between modalities intra- and interobserver variation. Pubmed and Medline databases were used, and systematic literature searches were carried out during April 2020. Inclusion and exclusion criterias have been adopted; the study has only used articles published from 2010 onwards. 3DE shows a higher correlation with CMR in assessment of LAV. The result also showed that 3DE has a lower variation between both intra- and interobserver. 3DE has a stronger correlation to CMR and a lower variation than 2DE, however, 3DE suffers from limitations. These limitations are time, staff experience, lack of reference values and cost to clinics. The authors recommend 3DE for more accurate LAV assessment. Further research for more adequate reference-values and software systems is needed.
Fatic, Amajla. "RIGHT VENTRICULAR STROKE WORK INDEX MED EKOKARDIOGRAFI HOS PATIENTER MED PULMONELL ARTERIELL HYPERTENSION, EN JÄMFÖRELSE MED HÖGERSIDIG HJÄRTKATETERISERING." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-43272.
Full textPulmonary hypertension (PH) is a disease with many different etiologies contributing to an increased pressure in the pulmonary circulation. PH is defined as a mean arterial pressure in the pulmonary artery ≥ 25mm Hg at rest measured by right heart catheterization (RHC). The different causes of PH are divided into five groups. This study focuses on group I, which consists of pulmonary arterial hypertension (PAH). PAH contributes to a pressure overload of the right ventricle. The right ventricle must work at a higher pressure, which leads to a reduced right ventricular function. Currently, right ventricular stroke work index (RVSWI) by right heart catheterization (RHC) is a measure of right ventricular workload. The purpose of the study was to compare RVSWI calculated with echocardiography to RVSWI by RHC. And to find an additional measure for assessing right ventricular function by echocardiography in patients with PAH. RVSWI was evaluated with two echocardiographic methods (RVSWIEKO1= 90 - (0,62 x pulmonary acceleration time (PAT) x stroke volume index (SVIEKO)), RVSWIEKO2= ((0,61 x tricuspid regurgitant maximum pressure gradient (TRmaxPG)) + mean right atrial pressure (mRAP) + 2) x SVIEKO). Both the echocardiographic methods showed a statistically significant difference (p <0.001) in absolute values compared to RVSWI by RHC. One of the echocardiographic methods (RVSWI EKO2) showed a moderate correlation with RHC, while RVSWIEKO1 showed a negligible with RHC. The study has shown that RVSWI evaluated with echocardiography can be used as an additional measure, when assessing right ventricular function. However, more studies are needed until the parameter can be used clinically.
Wedenfelt, Johan. "Jämförelse av slagvolymer över mitralis- och aortaklaffarna med 3D-färgdoppler, tredimensionell transthorakal ekokardiografi och 2D doppler hos friska frivilliga." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-83400.
Full textTörnqvist, Frida. "Hur väl korrelerar olika principer att med 2-D ekokardiografi mäta vänster förmaksstorlek? : En jämförelse mellan två metoder av olika komplexitetsgrad." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-75011.
Full textJesperson, Mora Anna. "Hur påverkar åldern på ultraljudsmaskinen bestämningen av vänster kammares ejektionsfraktion? : En jämförelsestudie mellan två ultraljudsmaskiner med en åldersskillnad på 10 år." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-75031.
Full textPetersson, Ida. "En jämförelsestudie mellan manuell, semiautomatisk och automatisk utlinjering av endokardiet vid bedömning av ejektionsfraktionen." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-84609.
Full textIntroduction: Ultrasound are soundwaves with frequencies above 20 000Hz. Piezoelectric crystals are used to generate sound waves that can be transmitted into the tissue and reflected back to the crystals to obtain an ultrasound image. The ejection fraction expresses how much blood the left ventricle pumps out with each contraction and is an important parameter for assessment of the hearts global systolic function. The recommended method Simpson´s biplane to assess ejection fraction is compared with Philips automatic function a2Dq, which is based on the principle of speckle tracking. Material and method: The study population included 32 tests subjects with age between 20-43 years old. The test subjects had no records of earlier heart pathologies. Apical 4- and 2-chamber images were collected for the purpose to measure the ejection fraction. The manual method Simpson´s biplane is based on the sonographers manual tracking of the endocardial border. The automatic function a2Dq is based on 53 heart models with different anatomy and physiology and applies a region of interest automatically along the endocardial border. The semi-automatic function allows the sonographer to adjust the region of interest but not the length of the chamber. Result: The result showed that there was no significant difference in the measured values of ejection fraction between the three different techniques. The semi-automatic and Simpson´s biplane method showed equivalent results. The automatic function showed a wide variance of measurements which resulted with a total of 6 measurement ended up below the normal values for ejection fraction. Discussion: Automatic functions for assessing the ejection fraction rapidly develops and requires validations. Automatic functions have shown to be advantageous as the are not as time-consuming as the manual Simpson´s biplane method. In most studies, however, the time aspect is emphasized at the expense of correct measurements results. The observations in this study show that the automatically function a2Dq from Philips are not providing correct measurements. Conclusion: According to observations in this study, it´s recommended that the automatic function from Philips shouldn’t be used.
Bohlin, Jessica. "Jämförelse av vänster förmaks storlek vid olika ekokardiografiska metoder." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-24269.
Full textAssessment of left atrial size is important in diagnosis and disease prognosis, but also in risk assessment of serious cardiovascular diseases. The most common method for assessing the size of the left atrium is echocardiography. The left atrium can be estimated from different measurement methods where the volume measurement in the apical four-chamber view and the two-chamber view is the most common measurement that gives the most realistic result. The size can also be measured by measuring the anteroposterior diameter in the parasternal long-axis view. The aim of the study was to investigate whether the size differs significantly between the methods and to see if the measurement in the long-axis view underestimates the size compared with the volume measurements. In the study, 30 patients’ echocardiographic images were analyzed with volume measurement as well as measurement of the anteroposterior diameter. The correlation analysis showed a significant positive correlation with a coefficient of determination of 0,667 (P <0,001). The Bland-Altman plot showed that all values in addition to one, remain within a 95% confidence interval. When comparing size classification between the methods, 60% similarity was shown. The anteroposterior diameter is difficult for the inexperienced to perform correctly as there are many artifacts and the volume measurement is easier to learn. The volume measurement has a greater variation than the anteroposterior diameter, which may be due to the diameter being limited by the thoracic cavity. The conclusion is that the methods are statistically significant different and that the anteroposterior diameter underestimate the size of the left atrium compared with the volume measurements.
Flamarz, Diana. "UTFÖRANDE AV EJEKTIONFRAKTIONSMÄTNING MED HJÄLP AV SIMPSON METOD AV EN STUDENT OCH EN ERFAREN BIOMEDICINSK ANALYTIKER." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-84617.
Full textEkokardiografiundersökning är en viktig och vanlig metod vid undersökning av hjärtat. Ekokardiografi används för att bedöma hjärtats funktion vid utredning av hjärtsjukdomar. Vid en ekokardiografiundersökning kan hjärtats flödeshastigheter, kontraktilitet (pumpförmåga), väggtjocklek, och innerdiameter undersökas. Alla dessa undersökningar görs med hjälp av tolkning av ultraljudsvågorna som ultraljudsgivaren skickar ut och tar emot. Givaren består av piezoelektriska kristaller som kan både sända och tar emot ultraljudsvågor med frekvens på över 20 kHz. Syftet med denna studie är att jämföra mätningen av den vänstra ventrikulära ejektionsfraktion (LVEF) mellan en erfaren biomedicinsk analytiker (BMA) och en student samt att se hur bildkvalitén påverkar resultatet. Mätningen utfördes med Simpsons- metoden. Resultatet analyserades med hjälp av en statistisk metod. Resultatet analyserades med hjälp av parat t-test för att se om det finns någon signifikant skillnad mellan utförandet av en BMA och en student. Mätningen utfördes på apikala 4-kammarbilder och apikala 2-kammarblider. Studien inkluderade 30 patienter, både hjärtfriska och hjärtsjuka patienter av både könen. Resultatet visade att det finns en signifikant skillnad i utförande av LVEF- mätningar mellan BMA och student, med lägre uppmätta värden av studenten.
Kassem, Sara. "Simpsons biplan metod jämfört med Philips Heart Model vid bestämning av vänsterkammares ejektionsfraktion." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-92907.
Full textIntroduction: Simpson’s biplane method is the most used method for determining the left ventricular ejection fraction (LVEF) in echocardiographic examinations. Ejection fraction is a central measurement of the heart's global systolic function. The probe with piezoelectric crystals emits ultrasound waves with a frequency above 20,000 Hz. The sound waves that are sent out into the body are reflected and then return to the probe to create an image. This study compares the two-dimensional (2D) ultrasound Simpson's biplane method with the Philips Heart Model method, which is an automated three-dimensional (3D) function for assessment of LVEF. Material and method: 31 subjects with no recorded heart pathologies between the ages of 21-64 were included in the study. Apical 4- and 2-chamber images were collected from the test subjects, where the Simpson's biplane method was applied to calculate the ejection fraction. 2D apical 4-chamber images were collected to convert to 3D and used to calculate the ejection fraction with the Philips Heart Model. Results: The results of this study showed that there is no significant difference between the Simpson’s biplane method and the Philips Heart Model method for determining ejection fraction. Discussion: The Philips Heart Model method is a relatively new feature that uses artificial intelligence to analyze 3D images. The Philips Heart Model method is a reliable feature to use as most studies have proven similar and reliable measurements when comparing it with other methods for determining LVEF. Conclusion: According to this study, the Philips Heart Model feature provides equivalent measurements in comparison with the manual method Simpson's biplane.
Latifpour, Nasrin. "JÄMFÖRELSE AV VÄNSTER FÖRMAKSVOLYM I APIKAL TVÅKAMMARPROJEKTION, INSPELADE MED TVÅ OLIKA ULTRALJUDS GIVARE (S5-1 OCH X5-1)." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-25120.
Full textAbstract: Left atrial size has a prognostic significance in cardiology.There is ecumenical agreement that measurement of left atrial volume (LAV) is the best way to evaluate the left atrial size. Currently, S5-1, a phased array transducer, is used as the first choice to depict the 2-dimensional (2D) two- and four apical chamber views. X5-1, a matrix array transducer, is a practical clinical option for collecting the same 2D projections, but it has not been adequately assessed against the S5-1 transducer with LAV in consideration. The purpose of the present study was to investigate whether there is any statistically significant difference in the determination of LAV in apical two chamber views depending on the choice of transducer. The study included 50 patients who were referred for an echocardiographic examination at the Department of Clinical Physiology and Nuclear Medicine at Skåne University Hospital in Malmö. Echocardiographic images collected with both transducers, from patients with both normal and abnormal left atrial sizes and with sinus rhythm. LAV was measured using Simpson's biplane method according to the current American Society of Echocardiography (ASE) and European Association of Cardiovascular Imaging (EACVI) guidelines. There was a significant correlation between the mean of LAV, measured in images obtained by the two different transducers (r = 0.98, P 0.0001). The Bland-Altman analysis showed a statistically significant agreement in LAV measurement between the two methods. The X5-1 transducer is possibly a practical alternative to obtain 2D apical two-chamber projection in a more time efficient manner compared to the S5-1 transducer.
Nyström, Issal Rebecca, and Susanne Svensson. "Jämförelse mellan automatisk och korrigerad automatisk beräkning av ejektionsfraktionen vid ekokardiografi." Thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-30498.
Full textAlcharif, Odai, and Sinan Baker. "Ekokardiografi: jämförelse av erfarenhetens betydelse vid mätningar av strain och strain rate i vänster kammare." Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44302.
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