Aspirin and Heart Attacks

Taking an low-dose aspirin every day to prevent a heart attack or stroke is no longer recommended for most older adults, according to guidelines released a few weeks ago. Doctors said for decades that a daily 75 to 100 milligrams of aspirin could prevent cardiovascular problems, the American College of Cardiology and the American Heart Association just reversed that idea.

This change comes after a large clinical trial found a daily low-dose aspirin had no effect on prolonging life in healthy, elderly people, and actually suggested the pills could be linked to major hemorrhages. The recommendations say low-dose aspirin should not be given to prevent atherosclerotic cardiovascular disease on a routine basis to adults older than 70 or any adult with an increased risk of bleeding.

“Clinicians should be very selective in prescribing aspirin for people without known cardiovascular disease,” Roger Blumenthal, co-chair of the new guidelines said in a statement. "It’s much more important to optimize lifestyle habits and control blood pressure and cholesterol as opposed to recommending aspirin."


Only select people with a high risk of cardiovascular disease and low risk of bleeding might continue using the pain killer as a preventative, as told by their doctor, Blumenthal said. I you are taking one, consult your doctor before quitting.

Aspirin and Heart Attack

Your chest feels heavy, as if you are in a vise and the pain is spreading to your jaw and shoulder. What to do, call 911, then chew a single uncoated full-size 325-mg aspirin.

The reason you need aspirin is the same reason you should call 911. A heart attack is a dynamic event, and early intervention can limit damage. Paramedics can give you oxygen and medication, and they will monitor your blood pressure and heart rhythm to forestall complications. In the hospital, doctors take EKGs and blood tests to see if you are having a heart attack; if so, they will usually try to open the blocked artery with an angioplasty and stent or a clot-busting drug.

Most heart attacks develop when a cholesterol-laden plaque in a coronary artery ruptures. Relatively small plaques, which produce partial blockages, are the ones most likely to rupture. When they do, they attract platelets to their surface. Platelets are the tiny blood cells that trigger blood clotting. A clot builds up on the ruptured plaque. As the clot grows, it blocks the artery. If the blockage is complete, it deprives a portion of the heart muscle of oxygen. As a result, muscle cells die, a heart attack.

Aspirin helps by inhibiting platelets and just a tiny amount is needed to inhibit all the platelets in the bloodstream. Since the clot grows minute by minute, time is of the essence.
Studies show that a chewed aspirin needs only five minutes to reduce TxB2 concentrations by 50% and 14 minutes for the chewed tablet to produce maximal platelet inhibition, versus 26 minutes for an unchewed aspirin swallowed with water.

Aspirin can also help prevent heart attacks in patients with coronary artery disease and in healthy men over 50 years of age. Low doses, between 81 and 325 mg a day, are needed.

Daylight Savings and Heart Attacks

A team of Swedish researchers conducted a study in 2008 that showed the rate of heart attacks during the first three weekdays following springtime daylight saving time increased by about 5 percent from the average rate during other times of the year. The effect did not arise at the end of daylight saving time in the fall.

The researchers attributed the small surge in heart attacks in the springtime to changes in people's sleep patterns. Lack of sleep can release stress hormones that increase inflammation, which can cause more severe complications in people already at risk of having a heart attack.

The 2009 Journal of Applied Psychology study found that mine workers arrived at work with 40 minutes less sleep and experienced 5.7 percent more workplace injuries in the week directly following the springtime daylight saving transition than during any other days of the year. The researchers attribute the injuries to lack of sleep.

A 2012 Journal of Applied Psychology study found that the incidence of cyberloafing significantly increased in more than 200 metropolitan US regions during the first Monday after daylight saving time in the spring, compared with the Mondays directly before and one week after the transition. The team attributed the shift to a lack of sleep and thus lack of workday motivation and focus.

Heart Attack and Cardiac Arrest

The terms “heart attack” and “cardiac arrest” are often used interchangeably. However, they are not equivalent. “Cardiac arrest” simply implies the heart has stopped pumping blood.  A heart attack is a lack of blood flow to a specific area of the heart caused by some blockage, spasm, or rupture.

People who have a heart attack are significantly more likely to survive than those who suffer cardiac arrest. While both are bad, cardiac arrest is worse.