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The coronary arteries can constrict as a response to various stimuli, mostly chemical. This is known as a coronary reflex. There is also a rare condition known as spontaneous coronary artery dissection, in which the wall of one of the coronary arteries tears, causing severe pain. [10]
An intravascular ultrasound image of the ostium of the left main coronary artery. Intravascular ultrasound, also known as a percutaneous echocardiogram is an imaging methodology using specially designed, long, thin, complex manufactured catheters attached to computerized ultrasound equipment to visualize the lumen and the interior wall of blood ...
The catheter is threaded into an artery in the forearm, and the tip is advanced through the arterial system into the major coronary artery. X-ray images of the transient radiocontrast distribution within the blood flowing inside the coronary arteries allows visualization of the size of the artery openings.
The relatively narrow coronary arteries are commonly affected by atherosclerosis and can become blocked, causing angina or a heart attack. The coronary arteries are classified as "terminal circulation", since they represent the only source of blood supply to the myocardium; there is very little redundant blood supply, that is why blockage of ...
The consultant cardiologist is responsible for gaining arterial access, inserting a sheath into either the radial or femoral artery, passing a wire and catheter into the coronary artery and selectively injecting contrast media into the coronary arteries. They then interpret the images taken to ascertain where the narrowed or blocked artery has ...
This image is a derivative work of the following images: Coronary.pdf licensed with Cc-by-sa-3.0,2.5,2.0,1.0, GFDL 2007-10-05T21:05:19Z Toony 1727x2011 (129568 Bytes) {{Information |Description=Coronary |Source=[[Image:Heart left anterior oblique diagrams.svg|100px]] |Date=2007 |Author=Patrick J. Lynch, medical illustrator |Permission= |other ...
The right coronary artery supplies oxygenated blood to the right atrium, the right ventricle, and the posterior third and inferior end of the interventricular septum. [2] [5] It may also supply 25% to 35% of the left ventricle (LV). [10] There is significant overlap of supply of the coronary arteries. [2]
The right coronary artery supplies the right atrium, right ventricle, and lower posterior sections of the left ventricle. The right coronary artery also supplies blood to the atrioventricular node (in about 90% of people) and the sinoatrial node (in about 60% of people). The right coronary artery runs in a groove at the back of the heart and ...