Our body needs oxygen to work. Blocked arteries mean less blood can pass through. To offset that, the heart has to pump harder. However, this causes the heart to overwork, eventually causing heart attacks.
By definition a stroke affects the brain by blocking small arteries that carry blood to the cells and deliver nutrients and oxygen. These become blocked and the cells that the artery is leading to, die. A similar thing happens when arteries to the heart muscle cells that are blocked causing a heart attack.
Collaterals.
coronary bypass
A heart attack
A heart attack occurs when the heart is starved of oxygen for a period of time, this maybe due to blocked arteries.
The blood vessel gets blocked. In the heart, if one of the coronary arteries get blocked by smoking, it can cause a myocardial infarction (Heart Attack).
When blood supply to the heart is blocked what happens is a myocardial infarction which can result in death.
It is possible that because you have blocked arteries in the heart that you may also have blocked arteries in your legs, restricting blood flow and causing pain in your legs. Vascular disease is often present throughout the body. Mention this pain to your doctor and have them check the pulses in your feet. You may also need an angiogram or ultrasound of your legs.
The heart receives its own supply of glucose and oxygen via the coronary arteries. If these arteries are blocked, the heart tissue could die. This condition is known as a heart attack.
The heart, of couse, but the cause is due to blocked or narrow arteries with blood clots.
The heart, brain, and the arteries
Arteries carry blood, oxygenated by the lungs, to the cells of the body. Since the heart is a large muscle, its cells need oxygen too. When one of the arteries supplying the heart with oxygenated blood is blocked ("occluded") the oxygen cannot reach the cells supplied by that artery.