title: [Characteristics of the phase of blood expulsion from the left ventricle in arterial hypertension and aortic valve stenosis].
abstract: A study of 96 patients (23 controls, 57 patients with arterial hypertension and 16 with aortal stenosis) has shown the ascending aortal pressure curve to conform to the ascending exponent with different time constants in all cases. The expulsion time constant for middle age (44 +/- 4 years) was 0.063 +/- 0.002 s, with the expulsion time/time constant ratio of 4.01, in normal controls; 0.095 +/- 0.03 s and 2.6, respectively, in hypertensive patients; and 0.170 s and 1.72, respectively, in patients with aortal stenosis. The difference between ventriculographic and estimated left ventricular stroke volumes was not significant (p less than 0.001). Hemodynamic resistance to expulsion was 132 +/- 6 din X s X cm-5 in the controls, and 299 +/- 14 and 305 +/- 28 din X s X cm-5, respectively, in patients with arterial hypertension and aortal stenosis.
mesh_terms: D000328:Adult; D001011:Aorta / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000503:physiopathology*; D002302:Cardiac Output; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D013318:Stroke Volume; D014655:Vascular Resistance
vernacular_title: Kharakteristiki fazy izgnaniia krovi iz levogo zheludochka pri arterial'noĭ gipertenzii i aortal'nom stenoze.