Coronary Circulation

(redirected from Coronary vessels)
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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.


References in periodicals archive ?
Together, the capabilities allow physicians a physiological and anatomical view of the coronary vessels to help diagnose and treat coronary artery disease, according to the company.
At one year, coronary vessels treated with Elixir's DESolve maintained their mean minimum lumen diameter (MLD) at 2.
In a cross-sectional study design, we tried to explore a possible relationship between QTD and the number of affected coronary vessels in a series of patients admitted for elective coronary angiography.
CT coronary angiography is an evolving technology that allows evaluation of the coronary vessels without the complications of cardiac arrhythmias, myocardial infarctions, coronary dissections, and femoral artery injuries that can occur with traditional coronary angiography.
Kastrati and his associates enrolled 300 patients with in-stent restenosis in native coronary vessels.
In 2011, Abbott Vascular received CE mark approval for the use of its XIENCE PRIME DES, originally developed for coronary vessels, in infrapopliteal arteries as well.
The hypothesis the researchers developed is that the mechanism, which influences the dysfunction, resides in the spasm of the small coronary vessels, the so-called coronary microcirculation.
Significant damage can be caused to the heart and coronary vessels after an ischemic event (lack of oxygen to cardiovascular tissues), during the opening of a vessel to restore blood flow (restenosis), or through cardiovascular surgeries.
Thus, it appears HRT is insufficient to slow atherosclerotic progression in coronary vessels and elsewhere in women with preexisting coronary disease, said Dr.
Developing a new catheterisation system and using two different types of contrast to highlight the coronary vessels (air and standard coronary radio-opaque contrast media) sets us apart from other research groups," he said.
During the study period, a total of 5,157 individuals suffered a heart attack or unstable angina pectoris, both generally caused by calcification of the coronary vessels.