[Mathematical analysis of informative criteria for the differential diagnosis of renovascular hypertension and essential hypertension]. / Matematicheskoe vydelenie informativnykh kriteriev dlia differentsial'noi diagnostiki renovaskuliarnoi gipertonii i gipertonicheskoi bolezni.

Retrospective clinical and mathematical analysis of 168 parameters was performed in 188 patients with arterial hypertension, using standard programmed case history format designed specifically for the purpose. A number of differential criteria were identified and their diagnostic informative value was assessed for each form of arterial hypertension. The isolated criteria were grouped into anamnestic, clinical-laboratory, radioroentgenographic and roentgenoangiographic ones. Anamnestic and clinical-laboratory groups of diagnostic criteria were shown to be acceptable for health services. Their use in prehospital screening of patients is expected to contribute to the diagnosis of basic disease provoking arterial hypertension.

[Evaluation of the echocardiographic parameters in definite electrocardiographic types of left ventricular hypertrophy]. / Otsenka nekotorykh parametrov ekhokardiogrammy pri opredelennykh elektrokardiograficheskikh tipakh gipertrofii levogo zheludochka.

Echocardiography parameters (thickness of the myocardium during the diastole, the mass of the left ventricular myocardium and its diastolic size) were compared with ECG types reflecting different combinations of signs of hypertrophy of the left ventricle (isolated increase in left ventricular voltage--type B, isolated change in the end part of the ventricular complex in the corresponding leads--type C, and combination of both signs on ECG "typical" of left ventricular hypertrophy--type D). The study was conducted on groups of patients with hypertensive disease and aorto-mitral valvular disease. Calculation of the statistically significant difference revealed an increase in the thickness of the myocardium during the diastole and in the mass of the myocardium of the left ventricle in type B and particularly in type D ECG, and a noticeable increase in the diastolic size of the left ventricle in ECG of type C and of type D in particular. This regularity confirms the conception that in increase in left ventricular voltage hypertrophy proper of the heart muscle develops in conjunction with an increase in the mass of the left ventricular myocardium mainly due to an increase in its thickness, while with changes in the end part of the ventricular complex an increase in the diastolic size of the left ventricle is revealed. The regularity is clearly detected both in hypertensive disease and in aorto-mitral valvular disease.