Heart attack occurs when blood flow to an area of heart muscle is blocked. If the blood flow is not restoring quickly, that area of heart muscle may damage due to lack of oxygen and start to die.
Heart attack is a major killer of both men and women in the Universe. However, the today treatments for heart attack not only save lives and prevent disabilities. Treatment gives excellent results if started within one hour of the beginning of symptoms.
Heart attacks can occur mostly due to the condition called coronary heart disease, a fatty substance called plaque start builds up for years on the inside walls of the coronary arteries that supply blood and oxygen to the heart. Over time, an area of plaque can crack, causing a blood clot to attach on the surface of the plaque. If the clot is large enough, it can block mostly or completely the flow of oxygen-rich blood.
At the time of a heart attack, if the blockage in the coronary artery not clears quickly, then the heart muscle will start to die and replace with a scar tissue. This damage to the heart may not be obvious, or it may cause other severe heart problems.
Other severe heart problems linked to heart attack are heart failure and arrhythmias or irregular heartbeats. Heart failure is the inability of the heart to pump enough blood throughout the body. Ventricular fibrillation is a serious arrhythmia that can cause even death if not treated properly and quickly.
Heart attack can also call as Coronary thrombosis, Coronary occlusion, acute coronary syndrome, Myocardial infarction, or MI, Acute myocardial infarction, or AMI.