Unexpected heart attack triggers
  • Jan 16, 2017

Sudden or Intense Exertion

Getting in shape will protect your heart in the long run, but doing too much could be dangerous. About 6% of heart attacks are triggered by extreme physical effort. And while you’ve probably heard that exercise is a good way to relieve stress, it’s especially important not to overdo it when you’re angry or upset.

Strong Emotions, Negative or Positive

Anger, grief, and stress are known triggers of heart problems, but joyful events can sometimes lead to a heart attack as well. It can be triggered by the kind of emotions that go along with events like a surprise birthday party, a wedding, or birth of a grandchild.

Lack of Sleep

You’ll feel grumpy and tired if you don’t get enough sleep on a regular basis, but it can raise your risk of a heart attack, too. In one study, researchers found that people who usually slept fewer than 6 hours a night were twice as likely to have a heart attack as those who slept 6 to 8. Doctors aren’t sure exactly why this is, but they do know that losing sleep can raise your blood pressure and lead to inflammation. Neither of those is good for your heart.

Getting Out of Bed in the Morning

Heart attacks are more common in the morning. Your brain floods your body with hormones to help you wake up, and that puts some extra stress on your heart. You may also be dehydrated after a long sleep, which can make your heart work harder.

Cold Weather

It’s a shock to the system. Being outside in the winter months can cause your arteries to narrow, making it harder for blood to reach your heart. On top of that, your heart has to work harder to keep your body warm. If you're concerned about it, limit heavy physical activity in cold temperatures.

Air Pollution and Car Exhaust

Heart attacks are more common when air pollution levels are high. People who breathe dirty air on a regular basis are more likely to have clogged arteries and heart disease. Sitting in traffic may be especially dangerous, because it can combine car fumes with anger or frustration.

Migraine Headaches

People who get these are more likely to have a heart attack later in life than those who don’t. And ones that include auras -- strange sights, sounds, or feelings that start before the headache hits -- seem to have a stronger link to heart problems. 

Cold or Flu

When your immune system fights off a bug, it can cause inflammation that can damage your heart and arteries. In one study, people with respiratory infections were twice as likely to have a heart attack. But their risk level went back to normal after they’d been clear of the infection a few weeks. Heart attack rates are also higher during flu outbreaks -- another good reason to get your flu shot.


Your chances of having a heart attack go up about 70% if you have this lung disease. Even if you use an inhaler to keep it under control, your risk is still higher than normal. Because of your asthma, you also may tend to ignore chest tightness, which can be an early sign of a heart attack. Doctors don’t know if breathing problems trigger heart attacks or if they simply have a common cause: inflammation.

Disasters, Natural or Manmade

Studies have shown that heart attack rates go up after major disasters like earthquakes or manmade disasters like a terrorist attacks. It may be triggered not just immediately following them, but even up to a few years later. You may not be able to avoid these kinds of situations, but you can do things to manage your stress afterward, like make sure you get enough rest and exercise


Like many forms of exercise, sexual activity has been linked to an increase in heart attack risk. But it’s a very small one, especially if you’re physically fit and in good health. For most people, sex can and should be an important -- and healthy -- part of life. But talk to your doctor if you have concerns.

Spectator Sports

Playing sports can possibly trigger a heart attack -- and watching them can, too. Excitement associated with the game can act as a major trigger.

Big, Heavy Meal

When you eat large amounts of food in one sitting, it leads to higher levels of the stress hormone norepinephrine in your body. That can raise your blood pressure and heart rate, and it may trigger heart attacks in some people. Very fatty meals can also cause a sudden jump in a kind of fat in your blood, and that may temporarily damage some blood vessels as well. 


A drink a day seems to help protect your heart against disease, but heavy drinking may do just the opposite. Over time, that can raise your blood pressure, increase certain kinds of cholesterol, and lead to weight gain -- all of which can hurt your heart. There also can be short-term consequences: A single night of binge drinking can raise your risk of heart attack over the next week,.


Just like alcohol, coffee has its pluses and minuses. Caffeine makes your blood pressure go up for a short time, and that can trigger an attack, especially if you don’t drink it regularly or are at risk for other reasons. Overall, though, coffee seems to be good for your heart. People who have 3 to 5 cups a day tend to have less plaque in their arteries -- and that’s a good thing.

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