An approximation of stenotic aortic valve area by phonomechanocardiographic method: the comparative study of noninvasive methods.

Phonomechanocardiographic and ultrasonocardiographic parameters were compared in the multiplex manner in order to assess a degree of narrowing of the stenotic aortic valve areas. Adult patients with aortic valve stenosis were included in the study. The main condition for admission in the research sample was that the mean rate of circumferential fibre shortening be greater than 1 s-1 i.

Electrocardiographic and clinical anticipation of the left ventricular systolic function, systemic vascular resistance, and myocardial hypertrophy--normal values and validation of method in patients with arterial hypertension.

In order to study the hemodynamic effects of the antihypertensive drugs in patients with essential hypertension, systolic time intervals from ECG data were extrapolated. The study was performed in 36 healthy individuals and 38 patients with essential hypertension without a drug therapy and/or in the wash out period more than three weeks and after a treatment. The stroke volume (SV) was determined as a product of the ejection time (ET), the pulse pressure (PP) and the flow coefficient (Kf).

The left ventricular ejection time/filling period ratio as derived and simplified new index for noninvasive approximation of primary lusitropy disturbances in chronic hypertensive heart disease: a comparative Doppler-cardiographic and digital-echocardiographic study.

A theoretical new Doppler-cardiographic index was developed for a noninvasive approximation of primary lusitropy disturbances from the peak filling/peak ejection rate ratio. This simplified index, the left ventricular ejection time/filling period ratio was directly extrapolated from the outflow and inflow sample volumes. An index was significantly lower in a group of hypertensive patients with global relaxation disturbance than in the group with "partial" lusitropy disturbance.