Coronary Circulation

(redirected from Coronary vessels)
Also found in: Medical.
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 It might be outdated or ideologically biased.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 ?
Shigero Saito, of Shonan Kamakura General Hospital, Kamakura City, Japan and National Principal Investigator of CSI's COAST trial, who treated the first patient with both of the newly approved products, said, Using the new ViperWire Advance FlexTip combined with the GlideAssist feature on Classic Crown allowed me to easily track the OAS device through tortuous coronary vessels and effectively modify a calcified lesion facilitating stent deployment.
We used the skeletonized technique to harvest the BIMA, as the skeletonized IMA is longer (5-7 cm) and its spontaneous blood flow is greater (approximately 20%), which enables the use of both IMAs as grafts to all necessary coronary vessels. The risk of sternal wound infection in BIMA grafting remains unclear.
5 hours.Since his visit to the UK, Dar had undergone various medical tests, from which it was established that he had issues with one of the coronary vessels, which for the time being is being treated with strong medication to avoid surgical intervention.
As the heart beats faster and harder, the coronary vessels open up and supply the additional blood flow that is required to feed the heart's increased demand.
The coronary angiogram performed two weeks after discharge revealed normal epicardial coronary vessels.
However, visualization of coronary arteries and their blood flow remains difficult because of the small size of the coronary vessels and the movement of the fetus.
'I have issues with one of the coronary vessels [and have also been ] experiencing progressive neck pain,' he said.
Use of Drug Eluting Stents via radial or femoral routes in all patients from both genders of any age, stent size, stent diameter and stented coronary vessels was documented on a specified proforma.
Coronary territories of the occluded coronary vessels are usually supplied by collateral circulation.
With integration of centreline extraction and segmentation the coronary vessels are extracted in each slice based on the provided centreline coordinates.
The effect of Ang-(1-7) on coronary vessels has been described in several studies (4,8).
The effect of crude extract and butanol fraction decreased the coronary effluent showing the vasoconstrictor effect on the coronary vessels. Comparatively, the crude extract was found more potent vasoconstrictor.