الكشف المبكر للخلل الوظيفي لعمل البطين الايسر الانقباضي في المرضى المصابين بارتجاع الصمام الابهر المزمن غير ذوي الاعراض باستخدام صدى القلب ثنائي الابعاد ذي التتبع النقطي == Early Detection of Left Ventricular Systolic Dysfunction In Asymptomatic Patients with Chronic Aortic Regurgitation by Two Dimensional Speckle Tracking Echocardiography
Author name:
ثامر عماد احمد
Supervisor name:
امال نوري المراياتي
General topic:
Medicine
Specific topic:
Echocardiography
Degree:
Higher Diploma
University:
University of Baghdad - Faculty Of Medicine
Language:
English
University location:
Baghdad
First pages:
19T1539 - p.pdf
Abstract:
Chronic aortic regurgitation (AR) is a left ventricular (LV) volume overload lesion with a long latency period prior to symptom development. Prior to symptoms, patients may exhibit normal exercise tolerance associated with LV remodeling and a preserved ejection fraction (EF).Conventional echocardiography has many limitations in prediction of early LV systolic dysfunction. Therefore; early detection of subclinical LV systolic dysfunction is crucial and could influence patients' prognosis by aiding the clinician to candidate patients for better management.Recently, 2 - D speckle tracking echocardiography have been shown to be useful noninvasive tools for detecting subtle LV contractile changes in the prior to reduced LVEF in patients with chronic AR .Aim of the Study : To detect early LV systolic dysfunction in asymptomatic patient with chronic aortic regurgitation by two dimensional speckle tracking echocardiography comparing that to conventional echocardiographic systolic parameters (EF by Simpson’s method and MAPSE ) and tissue Doppler echocardiographic systolic parameter ( s) .Patients and Methods : Sixty one asymptomatic patients with chronic aortic regurgitation, with no ischemic heart diseases ( by Angiography ) or conductive heart diseases, no diabetes mellitus, no hypertension, and no other valvular heart diseases (group 1) and fifty age and sex - matched healthy subjects (group 2) were enrolled into the study. Group (1) was further classified into 3 sub - groups according to 4 chosen parameters from the published guidelines of ASE into : Mild AR, Moderate AR, and Severe AR.All patients and controls underwent echocardiographic examination including conventional echocardiography, tissue Doppler study and 2 - D Speckle Tracking Echocardiography.Results : As compared to other systolic parameters ,global longitudinal strain measured by 2 - D speckle tracking echocardiography was the most useful tool to detect subtle LV systolic dysfunction with sensitivity and specificity of 75.4% and 99% respectively and AUC of 0.928 for a cut off value of > ( - 19.62).Moreover, GLS has highest sensitivity and specificity in detection of subtle LV systolic dysfunction in moderate AR .In moderate AR ,a cut off value of > ( - 19.62) has sensitivity and specificity of 91.3% and 95.5% respectively, with PPV and NPV of 87.5% and 96.9% respectively, AUC of 0.981 and a P value of <0.0001. In all types of AR, GLS had higher NPV than PPV which makes it a powerful screening tool for early detection of subtle LV systolic dysfunction.Conclusion : Global Longitudinal strain measured by 2 - D speckle tracking echocardiography is an excellent tool for early detection of subtle LV systolic dysfunction in asymptomatic patients with chronic AR.
