If a blood clot forms, it may eventually enter the left ventricle and then get pumped out into the body. If this happens, the clot may travel to the brain, block the flow of blood in a cerebral artery, and cause a stroke. Multiple disorganized wavelets of electrical activity bombard the AV node with electrical impulses. When a great many electrical impulses are conducted through the AV node down into the ventricles, the ventricles contract very rapidly, producing a very fast heart rate. When the ventricles contract too rapidly, less blood is pumped into the body and blood may back up into the lungs.
Rapid contraction increases the ventricles' demand for oxygen.
The demand may exceed the ability of the coronary arteries to supply the ventricles with oxygen-rich blood, causing angina. Find a cardiologist near you. Join a live chat or threaded forum. All Rights Reserved Contact the webmaster with any technical issues.