Coronary Circulation

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Related to Coronary arteries: coronary artery disease, Coronary circulation
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Out of 55 dissected hearts, 26 (47.3%) had one right coronary artery, 23 (41.8%) had two coronary arteries, and 6 (10.9%) had three coronary arteries.
We think that coronary artery dissection in our case was probably related to either mechanical injury during excision and reimplantation of the coronary buttons or from instrumentation at the time of administration of cardioplegics into the coronary arteries [9].
Percutaneous coronary angioplasty may be useful for the noninvasive revascularization of atherosclerotic lesions in abnormal coronary arteries.
Kronmal, "Anomalous coronary arteries: location, degree of atherosclerosis and effect on survival-a report from the coronary artery surgery study," Journal of the American College of Cardiology, vol.
In this method, the optimal catheter is selected on the basis of the internal anatomy of the patient's coronary arteries (Flehmann et al., 2011; Rahman et al., 2011a; Rahman et al., 2011b).
They supply blood to the heart muscle through a network of smaller coronary arteries. Blockage in any of your coronary arteries is called coronary artery disease (CAD), and it's a precursor to a heart attack.
Multislice computed tomography (MSCT) is a non-invasive imaging tool, and it has an excellent spatial resolution that allows excellent evaluation of small coronary arteries. The short examination time and minimal aftercare make MSCT more practical than conventional coronary angiography.
Naturally, clamping of coronary arteries (CA) triggers an ischemic reaction.
According to this hypothesis, the influence of estrogen and progesterone is responsible for changes in the medial layers of the wall of coronary arteries in terms of the proliferation of smooth muscle cells, collagen synthesis, and redistribution of proteins and mucopolysaccharides.
Echocardiography is commonly used as a screening exam, with excellent visualization of the proximal coronary arteries. (4) It can also give valuable data regarding cardiac function to evaluate for complications.
Pigs-in-a-blanket coronary arteries: a case of immunoglobulin G4-related coronary periarteritis assessed by computed tomography coronary angiography, intravascular ultrasound, and positron emission tomography.

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