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  • Title: [Echocardiographic orientation evaluation of the function of the left heart ventricle].
    Author: Dvorák I, Spác J, Blaha M, Nĕmcová H, Lupínek P, Bednarík O.
    Journal: Vnitr Lek; 1989 Aug; 35(8):752-7. PubMed ID: 2800382.
    Abstract:
    The authors discuss the possibility to make use of a simple echocardiographic indicator of left ventricular function--the angle formed by the anterior cusp of the mitral valve and the line of the interventricular septum, assessed from a four-chamber tracing (angle M). Based on echocardiographic examination of 87 subjects they established their own standards. They consider values above 30 degrees as pathological, suggesting impaired left ventricular function. The M angle correlates significantly with invasive (final diastolic pressure in the left ventricle, ejection fraction) and with non-invasive (top speed of shortening of the circumferential fibre) indicators of left ventricular function. The authors assume that this simple, quick screening of left ventricular function will prove helpful, in particular in subjects where visualization by one-dimensional echocardiography from a parasternal approach is difficult. In practice it can be also applied for evaluation of left ventricular function during loads, in particular in dynamic echocardiography.
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