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  • Title: The superiority of mitral E point-ventricular septum separation to other echocardiographic indicators of left ventricular performance.
    Author: D'Cruz IA, Lalmalani GG, Sambasivan V, Cohen HC, Glick G.
    Journal: Clin Cardiol; 1979 Apr; 2(2):140-5. PubMed ID: 262569.
    Abstract:
    M-mode echocardiography, angiocardiography, and coronary arteriography were done in 40 patients with coronary heart disease, 12 with congestive cardiomyopathy, and 14 with no detectable cardiac or coronary abnormality. We measured mitral E point-ventricular septum separation (EPSS) at the moment of the E peak; the previously described method measures EPSS as the vertical distance between the nadir of systolic septal motion and the subsequent mitral E peak. Angiocardiographic ejection fractions correlated better with EPSS (r = 0.83) than with left ventricular (LV) end-diastolic internal diameter (r = 0.62), LV internal diameter systolic shortening fraction (r = 0.64), LV echocardiographic ejection fraction (r = 0.70), and LV posterior wall systolic thickening (r = 0.58). Patients with angiocardiographic ejection fractions below 55% usually had EPSS values over 10 mm by our method. Six false negatives and one false positive occurred. Our observations in patients with impaired LV performance suggest that LV dilatation, and especially dilatation of the LV outflow tract, is relatively more important than reduction in the amplitude of diastolic anterior mitral excursion in the production of high EPSS values. Although the usual method for measuring EPSS and ours are equally satisfactory, ours has certain theoretical advantages.
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