Results 281 to 290 of about 440,279 (349)
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Pulmonary Vascular Resistance in Emphysema
Chest, 1994To assess the hemodynamic effects of pulmonary microvasculature disruption in emphysema, we examined resting pulmonary hemodynamics and lung function in 12 carefully identified patients with type A chronic obstructive pulmonary disease. Individuals with respiratory muscle weakness and intercurrent infection were excluded.
L L, Schulman +3 more
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Pulmonary vascular resistance and vascular transmural gradient
Journal of Applied Physiology, 1960Perfusion studies were made on vascular beds of isolated dog lungs. Submerged, gas-free, fluid-distended lobes served for studies of resistance versus transmural pressure in a technique that abolished gravitational effects. Air-distended lobes with varying degrees of pulmonary edema were used to display the transmural gradient differences produced by ...
T C, LLOYD, G W, WRIGHT
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Pulmonary Vascular Resistance and Cavopulmonary Anastomosis
The Annals of Thoracic Surgery, 1967n many cases of tricuspid atresia characterized by decreased pulmonary blood flow, correction has been achieved by anastomosis of the I side of the superior vena cava to the distal divided end of the right pulmonary artery [l] (the Glenn procedure). This technique has been less successful with newborn infants, however, and it has been assumed that the ...
D R, Kahn +4 more
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Stressing the right ventricular-pulmonary vascular unit: beyond pulmonary vascular resistance
Heart, 2016Although knowledge about the pulmonary circulation has advanced substantially, it often remains unclear why one patient behaves differently from another with what appears to be the same degree of pulmonary hypertension. Already in 1628 William Harvey understood the importance of the right ventricle (RV) and its interaction with the pulmonary ...
Guido, Claessen, Andre, La Gerche
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American Journal of Respiratory and Critical Care Medicine, 2018
Although often clinically unrecognized, the pulmonary circulation is frequently affected in patients with chronic obstructive pulmonary disease (COPD), and the presence of pulmonary vascular disease is associated with poor prognosis and frequent ...
G. Kovacs +8 more
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Although often clinically unrecognized, the pulmonary circulation is frequently affected in patients with chronic obstructive pulmonary disease (COPD), and the presence of pulmonary vascular disease is associated with poor prognosis and frequent ...
G. Kovacs +8 more
semanticscholar +1 more source
Noninvasive Estimation of Pulmonary Vascular Resistance in Pulmonary Hypertension
Echocardiography, 2009Background: Determination of pulmonary vascular resistance (PVR) in patients with suspected or known pulmonary hypertension (PH) requires right heart catheterization. Our purpose was to use Doppler echocardiography to estimate PVR in patients with PH.
Navin, Rajagopalan +6 more
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Segmental vascular resistance in postobstructive pulmonary vasculopathy
Journal of Applied Physiology, 1990Chronic unilateral pulmonary arterial ligation has been touted as a model of arteriopathy resulting in a tremendous increase in anastomotic bronchial flow (Qbr) via collaterals. To investigate its effects on the pulmonary vasculature, we ligated the left main pulmonary artery of seven dogs and 120 days later pump perfused their left lower lobes (LLL ...
R P, Michel, T S, Hakim, D, Petsikas
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Ventilatory air pressure and pulmonary vascular resistance
American Heart Journal, 1960Abstract The effects of various inspiratory air pressures on the pulmonary vascular resistance of 15 dogs which had undergone thoracotomy were examined in 116 experiments by simultaneous measurement of pulmonary arterial flows and pressures. Inspiration was produced by positive-pressure insufflation; expiration was produced by the passive fall of air
M, HARASAWA, S, RODBARD
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Pulmonary Vascular Resistance Following Thoracotomy
Archives of Surgery, 1965Introduction STUDY of pulmonary vascular resistance following thoracotomy in the human has largely been confined to the late postoperative period. 1 We have measured pulmonary vascular resistance (PVR) preoperatively and in the early postoperative period. A marked elevation at this time is the reason for this presentation. Our interest in the changes
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