The cascade concept for Doppler-cardiographic quantification.

On the basis of the presented original "cascade concept" from extrapolated formulas one could perform exactly the individual approximation for the left ventricular performance and for the diastolic cardiac function, respectively, according to the degree of absolute and procentual deviation from the given normal values excluding the influence of the body surface area (m2), the heart rate (min-1) and the life age (years). The Doppler-cardiographic indications for the left ventricular performance are the mitral filling index in the L/min/m2 and flow distance index in the cm/min/m2, the stroke volume in ml and flow volume in the L/min, the stroke distance in cm and the flow distance in the cm/min, the filling volume in ml/m2 and the distance index in the cm/m2, respectively.

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).

[Significance of two-dimensional echocardiography in the diagnosis of mitral valve calcification--sensitivity and specificity].

The effect of two-dimensional echocardiography in assessment mitral valve calcifications was compared to computed tomography (CT) in 50 patients with pure rheumatic mitral stenosis (MS). Echocardiography revealed no mitral calcifications in 23 patients, respectively 46 per cent (grade 0). Twelve patients (24 per cent) had calcifications smaller than 2.

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.