[Improvement of coronary flow by artificial decending the intrathoracic pressure].
In simulating the changes of intrathoracic pressure during deep inhalation, the intrathoracic pressure was descended by repeated aspiration from thoracic cavity in 8 dogs. The volume of coronary flow was observed simultaneously. It was found that when intrathoracic pressure was dropping the coronary flow volume 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.
Zhang
T
T
Department of Arterioslerosis, Beijing Heart Lung Blood Vessel Research Center.
Fu
C Y
CY
Huang
Z F
ZF
Niu
X
X
D000818:Animals; D001011:Aorta; D001794:Blood Pressure; D003326:Coronary Circulation / Q000502:physiology*; D004285:Dogs; D005260:Female; D008297:Male; D011312:Pressure; D012119:Respiration; D013318:Stroke Volume; D013909:Thorax; D014655:Vascular Resistance