A heart attack occurs when an artery that sends blood and oxygen to the heart is blocked. Fatty, cholesterol-containing deposits build up over time, forming plaques in the heart's arteries. If a plaque ruptures, a blood clot can form. The clot can block arteries, causing a heart attack.
Drug misuse
Using stimulants such as cocaine, amphetamines (speed) and methamphetamines (crystal meth) can cause coronary arteries to narrow, restricting blood supply and triggering a heart attack. Heart attack from the use of cocaine is one of the most common causes of sudden death in young people.
Coronary artery disease (CAD) is the main cause of heart attack. A less common cause is a severe spasm, or sudden contraction, of a coronary artery that can stop blood flow to the heart muscle.
A heart attack may strike suddenly, but most people have warning signs and symptoms hours, days or weeks beforehand. One of the earliest warning signs of an impending heart attack is chest pain, or angina, that occurs repeatedly because of exertion and is then eased by rest.
Both panic attacks and heart attacks can wake you from sleep.
Most heart attacks involve discomfort in the center of the chest that lasts more than a few minutes, or that goes away and comes back. It can feel like uncomfortable pressure, squeezing, fullness or pain. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach.
Pre-Heart Attack Symptoms – Female
Men may feel pain and numbness in the left arm or the side of the chest. In women, these symptoms may appear on the right side. Women may experience unexplained exhaustion, or feel drained, dizzy or nauseous. Women may feel upper back pain that travels up into their jaw.
It can feel like uncomfortable pressure, squeezing, fullness or pain. Discomfort in other areas of the upper body. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach. Shortness of breath.
Stress may lead to high blood pressure, which can pose a risk for heart attack and stroke. Stress also may contribute to such cardiovascular disease risks as smoking, overeating and lack of physical activity.
Others -- women more so than men -- will experience some atypical symptoms as well, which may include fatigue, a general sense of unease, vague discomfort, back or abdominal pain and declining stamina. Both types of symptoms can be experienced months before an actual heart attack occurs.
There is nothing anyone can do to stop a heart attack when it is happening. However, there are things people can do to help avoid having a heart attack in the first place. These include eating healthy, being physically active, not smoking, and getting plenty of sleep.
Signs of a heart attack include:
- Pain or discomfort in one or both arms, the back, neck, jaw or stomach. - Shortness of breath with or without chest discomfort. - Other signs such as breaking out in a cold sweat, nausea or lightheadedness. (If you're experiencing any of these symptoms, call 9-1-1 immediately.)
Age. The majority of heart attack deaths occur in patients ages 65 and older, but a man's risk begins to increase at 45 (for women, it starts at 55).
“I understand that heart attacks have beginnings and on occasion, signs of an impending heart attack may include chest discomfort, shortness of breath, shoulder and/or arm pain and weakness. These may occur hours or weeks before the actual heart attack.
The symptoms of an NSTEMI heart attack may resemble a regular heart attack. They include : pressure-like pain in the chest that lasts more than 10 minutes. pain that radiates to either arm, neck, or jaw.
What time of day is a heart attack most likely to happen? “Most heart attacks hit during the early morning hours from 4 – 10 am when blood platelets are stickier, and there is increased adrenaline released from the adrenal glands that can trigger rupture of plaques in coronary arteries,” said Dr. Goodroe.
A heart attack or pulmonary embolism usually will cause enough pain to lead the person to wake and go to an emergency room. But death during sleep with no symptoms at all is likely due to the heartbeat going haywire.
How long can a heart attack last? Heart attack symptoms typically persist for longer than a few minutes. They may go away and come back again, or they may occur intermittently over several hours .
Electrocardiogram. An electrocardiogram (ECG) is an important test in suspected heart attacks. It should be done within 10 minutes of being admitted to hospital. An ECG measures the electrical activity of your heart.