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Academic literature on the topic 'Tvådimensionell ekokardiografi'
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Dissertations / Theses on the topic "Tvådimensionell ekokardiografi"
Hassan, 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 textJohansson, 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.
Hugh, 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.
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.
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.
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.