it is an index of the adaptation of the left ventricle to cardiac disease , and , when elevated , it indicates cardiac decompensation . sigma max was calculated by coupled m mode echo-lv pressure recordings in 51 cases : 11 patients without lv disease , 14 patients with aortic stenosis ( as ) , 14 patients with aortic incompetence ( ai ) , 7 patients with severe mitral incompetence ( mi ) and 5 patients with cardiomyopathy with dilatation ( cmp ) .
C0018799
cardiac disease
C0878544
cardiomyopathy