Does having one tablet of aspirin everyday after the age of 40 help avoiding a heart attack?

Not in everyone. Only those with sufficient risk factors will benefit from the daily aspirin. Talk to your primary care doctor to determine if you need it, since taking it without an indication can lead to gastric bleeding.
Decrease Risk. An Aspirin daily can decrease the risk of heart attack by up to 50%.

Related Questions

Does 325 mg of aspirin have same protective benefits for heart attack as 81 mg? Is one better than other?

81 usually enough. For most people, 81mg is enough protection without the increased bleeding risk of 325mg. Normally you only need 325mg if you have a heart attack or stroke while on 81mg or if you have bypass. But many cardiologists still use 325mg no matter what the studies say.

How does aspirin help you during a heart attack?

Aspirin. Aspirin blocks platelet clumping that contributes to the blockage of the coronary artery that is the cause of a heart attack.
Anti platelet action. Seems to reduce thrombus, and limit damage due to its anti platelet effect.

What dosage of aspirin for suspected heart attack?

Call 911 then 325 mg. For someone with new-onset of symptoms suggesting a heart attack, call 911 then chew and swallow a 325 mg Aspirin tablet. For someone who has had a heart attack in the past, daily Aspirin 81-162mg is recommended. This is termed secondary prevention.

How do you give aspirin to someone who is having a heart attack?

Chew. Chew, chew it up. That's the fastest way to get it in their bloodstream. If they are unresponsive you cannot give it to them as it could end up in their airway. Good question.
Oral. Pill and sip, of water. Under tongue can get some absorption if not swallowing. Rectal suppository if available, and if not able to swallow a pill.

How can aspirin help during a heart attack? Are there any diseases/conditions where aspirin should not be taken?

Aspirin. A heart attack is causes by blockage of a coronary artery, usually by a clot. Aspirin prevents platelets (type of blood cell) from forming a clot and thereby help during heart attacks. Most notably, Aspirin should not be taken by people (adults) who have a history of bleeding problems, stomach ulcers, or reaction to the medication.
Proven benefit. There is good data - old but good - showing that people having a heart attack have increased survival when given an aspirin. It is a mild blood thinner, which is how we believe it helps. During a heart attack, the only contraindication would be active bleeding. If you are taking it to prevent a heart attack, however, that is different. I'd see your doctor in that case to discuss the risks.

How does baby aspirin decrease the risk of a heart attack?

Prevents clots. Baby Aspirin helps prevent platelets from clumping and forming clots that might block blood flow in any narrowed coronary arteries that feed the heart muscle. If blood flow is blocked in those coronary arteries, the heart muscle would not get enough oxygen that it needs cause the heart to stop beating or to beat uncontrollably, or fibrillate, both of which would result in a heart attack.
Decrease clumping. Asporin is a platelet inhibitor a d prevents clumping of them on an unstable air any plaque in the coronary arteries.