ABSTRACT
Blood pressure was reduced in the hind part of rats by narrowing the aorta in regions distal to renal artery ostium. Resetting of microcirculatory bed (m. extensor hallicis propius) was revealed in arterial hypotension, characterized by resistance vessel dilatation ensuring the decrease in hydravlic resistance, thus facilitating blood supply and tissue metabolism normalization, irrespective of marked reduction in perfusion pressure.
Subject(s)
Hypotension/physiopathology , Muscles/blood supply , Animals , Aorta, Abdominal/physiology , Arteries , Blood Gas Analysis , Blood Pressure , Chronic Disease , Constriction , Male , Microcirculation/physiopathology , Rats , Time Factors , Vascular ResistanceABSTRACT
The ECG data are analyzed in the adolescents, aged 15-16, with arterial hypertension, revealed during the prospective examination. Th main group consisted of 238 adolescents with arterial hypertension, and the control group of 172 healthy adolescents. ECG recording was done in 12 conventional leads. ECG was assessed according to the Minnesota code. The data were compared with the criteria of the clinical electrocardiography. 1/3 of the adolescents had normal ECG. The duration of RQ interval, P wave, QRS complex and internal deviation time were within normal, as in the adults. The signs of the left ventricular hypertrophy were revealed in 11.3% of the adolescents of the main group. The sign RV5,6 + SV1 greater than 35 mm was the most typical one. The left ventricular electric prevalence by the position of the transitional zone was observed in 44.1% of the adolescents of the main group. Sinus tachycardia was detected in 14.7% of the cases.
