7 Signs You Might be Headed for a Heart Attack

Your mood, sleep schedule, and even your neighbourhood could be putting your ticker in trouble.

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01-headed-for-heart-attack-angry

You get angry over the littlest things

Tend to morph into Hulk when you're upset? Those fiery emotions can drastically increase your risk for a heart attack. Researchers at the University of Australia questioned 313 patients who had suffered suspected heart attacks about their anger levels before the onset of symptoms. They found that patients were 8.5 times more likely to have a heart attack in the two hours following an intense outburst of anger, defined as "very angry, body tense, clenching fists or teeth." The more often you're angry, the higher your chances for a heart attack.

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You spend most of your time in front of a screen

Yes, that includes working on your computer. A study from the University College London reports that people who watch TV or work on a computer for four or more hours a day increase their risk of an event associated with cardiovascular disease, like a heart attack, by 125 percent. Long periods of sitting deplete the body's supply of lipoprotein lipase, an enzyme that breaks down fat and prevents clogged arteries. If you spend most of your day plopped behind a desk, take a brief walk after every 20 minutes or try a standing desk. You can burn 30 percent more calories when you stand than when you sit. Stay active with these exercises for heart health.

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You log less than six hours of sleep each night

Many adults struggle to get the recommended seven to nine hours of sleep each night, but consistently missing that mark could be deadly. A study published in the Scandinavian Journal of Work, Environment & Health found that Japanese men who got less than six hours of sleep were five times more likely to have a heart attack than men who slept seven or eight hours a night. Another study from Jichi Medical School in Tochigi, Japan, found the same risk applied to Japanese women who got less than six hours of sleep.

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You live in a smoggy area

Smog is just as bad for your heart health as it is for your lungs. Researchers used hourly air pollution measurements in South Boston to determine how exposure to particulate matter (small combustion particles that come from fuel burning and vehicle emissions) affected patients in this area who had heart attacks. They found that exposure to high concentrations of air pollution increased the likelihood of a heart attack by 48 percent in the two hours before patients first experienced heart attack symptoms. The risk went up to 69 percent when people were exposed to high levels of air pollution for 24 hours before the onset of symptoms.

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You're divorced

Divorce can cause literal heartache. Researchers at the Duke University School of Medicine conducted an 18-year-study of nearly 16,000 men and women between the ages of 45 and 80 who had been married at least once. Every two years, researchers assessed the participants' marital status and overall health. Divorced women were 25 percent more likely to have a heart attack than those who stayed married. Women who had two or more divorces were 77 percent more likely to have a heart attack. As for the men, the risk of heart attack stayed the same regardless of whether they were married or divorced-at first. But if they divorced at least twice, their heart attack risk increased by 30 percent.

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It's Daylight Saving Time

When researchers examined three years of Michigan hospital records to track the number of heart attacks that required stent insertions, they found that the frequency of these procedures fluctuated when Daylight Saving Time started and ended. On the Monday after "springing ahead" an hour, there was an 24 percent increase in heart attacks. (However, on the Tuesday after "falling back," there were 21 percent fewer daily heart attacks). Since the total heart attack counts for those weeks were not drastically different from other weeks, researchers determined that the time changes didn't necessarily make the heart attacks happen, but rather made them likely to occur sooner than they otherwise would have. This is probably due to disrupted sleep-wake cycles and increased stress at the start of a new week of work.

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07-headed-for-heart-attack-extreme-temperature

You live in an area with extreme temperatures

Studies show that both extreme cold and extreme heat can put people at risk for heart attacks. Using data from cardiac patients in the Worcester Heart Attack Study, scientists found that exposure to temperatures lower than 17º F in the two days prior to a heart attack increased patients' risk by 36 percent. Here's how to trick your body into feeling warmer on frigid days. On the other end of the spectrum, British researchers found that once the temperature reaches 68º F, each increase of 1.8º F increased the risk of heart attack by 2 percent over the next one to six hours. On the first day of a hot spell, that risk jumps up to 6.5 percent per 1.8º F increase.

This article originally appeared on RD.com.

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