You're welcome.
"approx 60-70% blockage on average in each...."
Doctors typically consider/perform angioplasty, with or without coronary stents, or coronary artery bypass graft (CABG) surgery on blockages of 70%75% or greater in the right coronary artery (RCA), left anterior descending (LAD), left circumflex (LCX) and some of their respective branches, also taking in consideration present symptoms.
"......as bypass surgery may not have any effect on valve...or does it have???"
Technically, it shouldn't, as reported in various medical literature, though sometimes, as applicable to the patient, mainly dependent on the severity of the blockages, if/when causing cardiac or myocardial ischemia (an insufficient amount of blood flow and oxygen to the heart muscle) at rest, hypokinesis, that is, low or reduced wall motion or contractility may/can occur in one (regional) or more areas of the heart. Even the entire heart (global) may/can become affected. This, if/when coupled with a bad heart valve, be it stenotic or regurgitive, is obviously not a good thing.
CardioStar*
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_ . _The coronary arteries are classified as so-called 'end circulation' since they represent the
only source of blood supply to the heart muscle (myocardium). There is very little redundant (auxillary) blood supply (unless sufficient coronary artery collateral circulation has developed), which is why a blockage or blockages in these can be extremely critical.
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WebMD
Living With Heart Disease
Coronary Artery Disease (CAD)CAD is chronic disease with no cure. When you have coronary artery disease, it is important to take care of your....
This is especially true if you have had an interventional procedure or surgery to improve blood flow to the heart.../It is up to you to take steps....
Recognize the symptoms......
Reduce your risk factors......
Take your medications......
See your doctor for regular check-ups......http://www.webmd.com/heart-disease/guide/living-with-heart-disease Coronary artery anatomy
Starting with the left anterior descending (LAD), the most critical, next to the
ultra-critical left main (LM).
http://www.heartsite.com/html/lad.html -
Heart-Healthy Foods
Nothing complicated, just plain and simple
AVOID foods high in saturated fat and cholesterol.
CHOOSE skim or low-fat milk, low-fat yogurt and reduced-fat cheeses. Eat more fish and poultry.
LIMIT servings to five to seven ounces a day.
TRIM visible fat. Limit egg yolks.
SUBSTITUTE two egg whites for one whole egg or use an egg-substitute. Eat more fruits and vegetables, whole grains, breads and cereals.
USE LESS salt and fat.
SEASON WITH herbs and spices rather than with sauces, gravies and butter
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Good to know, for the primary and secondary prevention of heart attack and brain attack/strokeEpidemiologic studies (EDS) have revealed risk factors (encompasses some new, novel or emerging) for atherosclerosis, typically affecting the carotid, coronary and peripheral arteries, which includes age, gender, genetics (gene deletion, malfunction or mutation) , diabetes (considered as being the highest risk factor), smoking (includes second and thirdhand), inactivity, obesity (a global epidemic, "globesity"), high blood pressure (hypertension), Low HDL (now questionable, according to recent studies) high LDL, small, dense LDL, RLP (remnant lipoprotein), high Lp(a), high ApoB, high Lp-PLA2, high triglycerides, HDL2b, high homocysteine (now questionable), and high C-reactive protein (CRP/hs-CRP).