Physiology of the Normal Pulmonary Circulation The distribution of pulmonary perfusion is mainly determined by gravity, but corrected to some extent by hypoxia-induced vasoconstriction to preserve matching of flow to regional decrease in ventilation. Strenuous exercise and/or hypoxia may ... R Naeije,...
The circulation pathway is as follows: The pulmonary arteries and their branches send blood from the heart to the lungs. Oxygen from the air is loaded onto hemoglobin in the red blood cells and then travels back to the heart through the pulmonary veins. The heart then pumps that oxygen-rich...
- 《Circulation》 被引量: 206发表: 2004年 Intrapulmonary shunting and pulmonary gas exchange during normoxic and hypoxic exercise in healthy humans Exercise-induced intrapulmonary arteriovenous shunting, as detected by saline contrast echocardiography, has been demonstrated in healthy humans. We have p.....
The subject matter encompasses the major diseases of the lung including asthma, cystic fibrosis, pulmonary circulation, ARDS, carcinoma, bronchitis, emphysema and drug delivery. Laboratory and clinical research on man and animals will be considered including studies related to chemotherapy of cancer, ...
pulmonary circulation time of the testee; (2) injecting a contrast agent with a certain concentration into the vein of the testee by a high-pressure injector, and making CT perfusion scan on the scanning position determined by the step 1; (3) after the scan is finished, selecting two ...
- 《Circulation》 被引量: 222发表: 1991年 Chapter 6 – Pulmonary ventilation: mechanisms and the work of breathing BACKGROUND: has been shown to impair pulmonary of CO2 during resuscitation. This phenomenon was investigated in a rodent model of and conventional resuscit... J. Nunn - 《Nun...
PVR is about a factor 1059−61 lower than the systemic vascular resistance (see sections “Differences between the systemic and pulmonary circulation” and “Normal values in the pulmonary circulation” of this chapter). View chapterExplore book Monitoring Mechanical Ventilation Salvatore Grasso, Vito...
Imaging the Right Heart-Pulmonary Circulation Unit: The Role of Ultrasound. Echocardiography is the first step in imaging the right heart pulmonary circulation unit (RH-PCU), and the only one to allow its complete morphologic, functional, and hemodynamic analysis in all clinical scenarios. Right ...
Background— Outcome of patients with hypoplastic left heart (HLH) is mainly influenced by the successful first-step palliation according to the Norwood procedure. An alternative approach is heart transplantation (HTX). The feasibility of ductal stenting in newborns with duct-dependent systemic blood...
Accordingly, the pulmonary vasculature is thin walled and highly compliant, thus, as pulmonary blood flow increases during exercise vessel caliber is largely “passively” controlled and subject to the pressures imposed by the systemic circulation on the left heart.2–4 Fig. 1A, B shows the ...