Heart Diseases - 4 Answers
Random Answers, Critics, Comments, Opinions :
1 :
If main coronary arteries are blocked, it is essential that the blood gets to the cardiac tissue via a different way, even if this is via newly created but inferior in quality vessels. Better something than nothing as nothing in this case means cardiac death and this is seldom compatible with human life.
2 :
Absolutely, it provides circulation to the heart when the coronary arteries become blocked. However, collateral circulation can only occur over a period of time. If the blockage occurs quicker than the collateral circulation can occur then you will still have some cardiac problems.
3 :
Exactly as the others said. Collateral circulation can develop as a new large artery in response to a specific blockage, going around it. A co-worker's husband has one. They were very confused when told he had a total blockage of a main artery, but they would not operate on him. Over many years of long hard physical work or exercise, additional more minute collaterals may develop to give additional blood flow to the whole heart with a lot of demand. I have this, and it saved me from multiple major heart attacks while on vacation. My collaterals that normally only open for exercise, took over completely for my three main arteries that were 99%, 99%, and 80% blocked. I had been like that for months, and did not even know it until I was out hiking and had terrible pain. But at low elevations, I could exercise without a problem. When I got back, doctors did an emergency triple bypass. Without my collaterals, odds are I'd have been pushing daisies.
4 :
Collaterals open up to provide alternate pathway for blood flow to the region supplied by blocked coronary arteries. So if good collaterals develop, it limits damage and promotes recovery of partially damaged heart muscle. This improves the functioning of the heart
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