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IMPROVEMENT OF CORONARY FLOW BY ARTIFICIAL DECENDING THE INTRATHORACIC PRESSURE

ZHANG TAO, FU LONG-YUAN, HUANG ZUO-FU , NIU XIN

(Department of Arterioslerom, Beijing Heart Lung Blood!'essel Reaserch Center, Bei如ag 100029；Department of Physiology, Beijing Chinese Medicine and Pharmacology University, Beijing(Department of Physiology, Beijing Chinese Medicine and Pharmacology University, Beijing 100029)

Abstract

In simulating the changes of intrathoracic pressure during deep inhalation，the irrtrathoracic pressure was descended by repeated aspiration from thoracic cavity in 8dogs. The volume of coronary flow was observed simultaneously. It was found that when intrathoracic pressure was dropping the coronary flow volun?e showed an increase as a result of decrease of right atrium pressure and increase of aorta pressure，thus creating an increased pressure difference between inflow and outflow of coronary circulation.

Key words: intrathoracic pressure;right atrium pressure; coronary vascular resistance ;;;

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Citing This Article：

ZHANG TAO, FU LONG-YUAN, HUANG ZUO-FU , NIU XIN. IMPROVEMENT OF CORONARY FLOW BY ARTIFICIAL DECENDING THE INTRATHORACIC PRESSURE. Acta Physiol Sin 1996; 48 (3): (in Chinese with English abstract).