Diastolic and systolic functions of the left ventricle determined by M-echocardiography in idiopathic hypertrophic cardiomyopathy

The diastolic function and the correlation between pump and diastolic function of left ventricle were studied in 35 patients with idiopathic hypertrophic cardiomyopathy with subaortic stenosis via a M-echocardiographic investigation by Echoview 80 C in the routine method. The following indices were used: A. For the diastolic function: 1. Telediastolic dimension (TDD) and volume (TDV) of left ventricular cavity. 2. Dimension (DPhFF) and volume (VPhFF) of the left ventricular cavity at the end of the phase of fast filling; 3. Velocity of fast filling of the left ventricle (ml/sec) - (formula; see text) 4. Fraction of fast filling of left ventricle (%) - (formula; see text) 5. Velocity of backward motion of the anterior mitral cusp at the beginning of diastole (E - F segment); 6. Velocity of early diastolic motion of the posterior wall of left ventricle (PWLV); 7. Ratio between early diastolic (D) and systolic (S) interval of PWLV: D/S; 8. Telediastolic interval (A - C) of mitral valve; 9. Index of fast emptying of left ventricle; 10. Amplitude E - E' of mitral echogram; II. Area (cm2) between two mitral cusps in diastole. B. For the systolic (pump) function: 1. Stroke and minute volume (SV, MV) of left ventricle according to the cubic formula and Teicholz formula; 2. Telesystolic dimension (TSD) and volume (TSV) of left ventricular cavity; 3. Fraction of shortening (FS) of left ventricle (%); 4. Mean velocity of shortening of the circumferential fibres (mVcf) of left ventricle (circumf./S); 5. Ejection fraction (EF) of left ventricle (%). 6. Distance between left ventricular endocardium of interventricular septum and point E of mitral valve; 7. Fraction of systolic thickening of IVS and PWLV; 8. Velocity of systolic thickening of IVS and PWLV; 9. Amplitude of systolic motion of IVS and PWLV.(ABSTRACT TRUNCATED AT 250 WORDS)