Echocardiographic assessment of ventricular wall motion in patients with poor acoustic windows: the uneasy transition from art to science.
Lang
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RM
Mor-Avi
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D015150:Echocardiography, Doppler / Q000379:methods / Q000592:standards*; D006801:Humans; D009200:Myocardial Contraction; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging*