Coronary Circulation


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.
Related to Coronary Circulation: Coronary arteries

Coronary Circulation

 

the blood supply to the cardiac muscle, carried by the intercommunicating arteries and veins that run throughout the myocardium.

In man, arterial blood is supplied mainly by the right and left coronary arteries, which begin at the base of the aorta. There are three types of blood supply—right coronary, left coronary, and general—which in some measure determine the nature of the pathology of the coronary circulation in the event of disease of the heart vessels. The coronary veins are both larger and greater in number than the arteries. The veins empty into the right atrium. The principal arterial and venous trunks are connected by a well-developed network of anastomoses, which facilitates collateral (shunt) circulation in cases of impairment of blood supply to the heart.

The great intensity of the blood supply to the myocardium is provided by a dense network of capillaries (approximately twice the number per unit volume than in the skeletal muscles). The level of the coronary circulation in a healthy body corresponds exactly to the force and frequency of the heartbeat. It is regulated both by physical factors (for example, blood pressure in the aorta) and by neural and humoral mechanisms. Coronary circulation is influenced by physical and mental condition and by the degree and character of stress or load. It is sharply impaired by nicotine and certain factors that lead to atherosclerosis, hyper-tension, and cardiac ischemia, such as overstrain of the nervous system, negative emotions, improper nutrition, and the absence of constant physical excercise. Coronary insufficiency and disturbances of coronary circulation are among the most frequent causes of death in economically developed countries, and there-fore their prevention and treatment (mainly of infarction) are the most pressing problems of modern medicine.

I. M. D’IAKONOVA and S. V. SAMOILOVA

References in periodicals archive ?
Nitric oxide activity in the human coronary circulation.
Right myocardial infarction tends to occur in conjunction with inferior myocardial infarction (8, 9) with proximal occlusion of the right coronary artery (RCA) which can be explained on the anatomical basis of the RCA supplying both the right ventricle and inferior left ventricle in right dominant coronary circulations (1) (Fig.
Moreover; in comparison with the diagnostic tests related with coronary circulation, the tests related with peripheral circulation are safer, less invasive and less expensive.
Coronary circulation is therefore not critically affected because of its larger size, which might explain why CAD is not evident in early-stage ED.
Among the topics are an overview of the circulation and blood, regulation of the heartbeat, the microcirculation and lymphatics, coronary circulation, and the interplay of central and peripheral factors that control the circulation.
Human coronary circulation is a series of cul-de-sacs supplying a series of cells.
2) Narrowing and eventual blockage of coronary circulation by atherosclerotic plaque rupture greatly reduces oxygen supply, leading to ischaemia and diminished cardiac function.
Based on data indicating that Generx appears to safe and has the potential to substantially increase coronary blood flow in the context of heart disease, together with an independent 10-year study that underscored the significance of coronary circulation for long-term cardiac health, we believe that our Generx product candidate could be developed as a front-line therapy for coronary artery disease from a more global perspective.
Intended as a guide for nurses, the book covers topics such as the mechanics of the cardiovascular system, cardiac electrophysiology, coronary circulation, risk factors for cardiovascular disease, reperfusion strategies, cardiac monitoring, at risk populations, evidence-based practice, and cardiovascular assessment.
Vein Lite Increases Pulmonary and Coronary Circulation