Partition of Coronary Flow and Cardiac Oxygen Extraction Between Coronary Sinus and Other Coronary Drainage Channels

Partition of coronary flow and cardiac oxygen extraction between coronary sinus and other coronary drainage channels.

• Coronary flow measurements in the intact animal and in man have been based principally on the amount of the coronary sinus drainage. Two assumptions are involved in the use of the coronary sinus drainage as an index of total and of left ventricular coronary flow: (1) The coronary sinus flow is a fixed percentage of total coronary flow, and (2) it represents all or a constant portion of the ve...

Effects of selective coronary embolization on coronary blood flow and coronary sinus venous blood oxygen saturation in dogs.

• Reflex mechanisms affecting the coronary circulation have been postulated and described as participating in the profound fall in blood pressure frequently attending cardiogenic shock following acute coxxmary occlusion. The reflex mechanisms suggested as being responsible for potentiating the cause of sudden death in coronary artery disease are: (1) an intercoronary reflex, which is believed t...

Influence of Coronary Flow upon Oxygen Consumption and Cardiac Performance.

• Work of our department and of others has shown that the magnitude of coronary flow (CF) is determined primarily by the oxygen consumption of the heart (OoC)" in such a manner that oxygen availability alters in a parallel fashion with O2C while oxygen extraction (O2E), within limits, remains constant." Two kinds of factors cause deviation of this relationship : (A) Factors which independently ...

Counterpulsation effects of coronary blood flow and cardiac oxygen utilization.

Relationship between coronary risk factors and the number of involved vessels in coronary angiography

Introduction: Diabetes mellitus, hypertension, hyperlipidemia and cigarette smoking are major coronary artery disease risk factors. This study was performed to detect the correlation between major coronary risk factors and the number of diseased vessels in coronary angiography. Methods: This descriptive study was performed on 196 patients with coronary artery disease who underwent coronary ang...