منابع مشابه
Problems of Pulmonary Circulation
This small book consists of a series of papers dealing with various aspects of hemodynamics in the macro-circulation of the lungs. The papers have little to say about the micro-circulation or the structure of the vessels themselves. Each paper is followed by a spirited discussion which proves to be a salubrious force against bias. The study group includes some of the most able and experienced i...
متن کاملPulmonary circulation at exercise.
The pulmonary circulation is a high-flow and low-pressure circuit, with an average resistance of 1 mmHg/min/L in young adults, increasing to 2.5 mmHg/min/L over four to six decades of life. Pulmonary vascular mechanics at exercise are best described by distensible models. Exercise does not appear to affect the time constant of the pulmonary circulation or the longitudinal distribution of resist...
متن کاملPulmonary circulation and ventilation.
The pulmonary circuit receives the whole of the cardiac output, and the flow through it is governed by events in the systemic circulation. Its function is gaseous exchange, and the low resistance and high capacitance of the circuit is subservient to this function. Local flow is affected by intra-alveolar oxygen tensions and regional flow by passive hydrostatic effects due to gravity. The distri...
متن کاملFetal and neonatal pulmonary circulation.
During fetal life, gas exchange is carried out in the placenta. The lung does not have a physiological role, apart from possible metabolic functions which include secretion of hormones, enzymatic conversion of inactive substances to functional hormones, and degradation of active materials to inactive metabolites. Blood flow through the lungs is quite low during fetal life; most of the systemic ...
متن کاملDiabetes and the pulmonary circulation.
DIABETES IS AN EPIDEMIC in the United States, affecting 8% of the population. The hallmark of diabetes is hyperglycemia due to either insulin deficiency or insulin resistance. Systemic vascular dysfunction is a central part of the pathophysiology of both type I insulin-dependent and type II non-insulin-dependent diabetes and involves both the microand macrocirculation (11). Coronary heart disea...
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ژورنال
عنوان ژورنال: Postgraduate Medical Journal
سال: 1987
ISSN: 0032-5473
DOI: 10.1136/pgmj.63.740.512-a