Stress and Heart Disease: What You Can Do to Improve Your Heart Health

The Hidden Dangers of Stress: How It Affects Your Heart

Work deadlines, money worries, caring for a loved one, a health scare: stress is part of life. But when it doesn’t let up, it does more than make you feel tense. Understanding how stress affects your heart can help you protect it. Chronic stress raises blood pressure, inflames arteries and can even trigger a heart attack.

The American Heart Association recognizes that psychological health is closely tied to heart health. Here’s what happens inside your body when you’re stressed, the hidden ways it harms your heart, and what you can do about it.

What Stress Does Inside Your Body

When you face a threat, your brain triggers the “fight or flight” response. Your body releases stress hormones, including adrenaline and cortisol. Your heart beats faster, blood pressure rises, breathing quickens, and blood sugar increases to give you energy.

That response is designed to be short-lived. The problem is that modern stress often doesn’t go away. When the stress response stays switched on for weeks, months or years, it begins to wear down the heart and blood vessels.

7 Hidden Ways Stress Affects Your Heart

1. It Raises Your Blood Pressure

Stress hormones tighten blood vessels and make the heart pump harder. Repeated spikes, along with long-term stress, can contribute to sustained high blood pressure, a leading cause of heart attack and stroke. Learn how high blood pressure damages your body.

2. It Inflames Your Arteries

Research has traced a direct path from the brain to the arteries. In a 2017 study published in The Lancet, people with more activity in the amygdala, the brain’s fear and stress center, had a higher risk of heart attack and stroke. Their brain activity was linked to increased activity in the bone marrow, which produces inflammatory cells, and to more inflammation in their arteries. Inflammation helps plaque grow and become unstable.

3. It Can Trigger a Heart Attack

In people who already have plaque in their arteries, an intense emotional moment, such as an outburst of anger, extreme fear or devastating news, can trigger a heart attack. A sudden surge in heart rate, blood pressure and clotting can cause vulnerable plaque to rupture. Large international studies have found that people under persistent psychological stress have a significantly higher risk of heart attack.

4. It Can Cause “Broken Heart Syndrome”

Takotsubo cardiomyopathy, often called broken heart syndrome, is a sudden weakening of the heart muscle triggered by severe emotional or physical stress, such as the death of a loved one. It causes chest pain and shortness of breath that look exactly like a heart attack. About 90% of cases occur in women, most often after menopause. Most people recover, but it requires emergency care. Learn more in our post on lesser-known heart conditions.

5. It Can Disrupt Your Heart’s Rhythm

Stress hormones make the heart’s electrical system more excitable. This can cause palpitations, skipped beats or a racing heart, and may trigger episodes of atrial fibrillation in people who are prone to it.

6. It Can Reduce Blood Flow to the Heart

In some people with heart disease, mental stress can temporarily reduce blood flow to the heart muscle, even when a standard exercise stress test looks normal. Researchers call this mental stress-induced ischemia. It often causes no symptoms but has been linked to a higher risk of future heart events.

7. It Drives Unhealthy Habits

Stress makes it harder to do the things that protect your heart. People under stress are more likely to sleep poorly, smoke, drink more alcohol, overeat, skip exercise and miss doses of their medications. The AHA notes that depression, in particular, is linked to poor adherence to heart medications.

Warning Signs That Stress Is Affecting Your Heart

Chronic stress often shows up in your body before you recognize it in your mind. Watch for:

  • A racing or pounding heartbeat, or palpitations
  • Chest tightness or pressure during stressful moments
  • Blood pressure readings that are creeping up
  • Trouble sleeping or waking up unrested
  • Headaches, muscle tension, or stomach upset
  • Irritability, anxiety, low mood, or feeling constantly on edge
  • Relying more on alcohol, food, or cigarettes to cope

Stress or a heart attack? Anxiety and panic attacks can cause chest discomfort, a racing heart and shortness of breath that feel a lot like a heart attack. Don’t try to tell them apart on your own. Call 911 for new or severe chest pain, chest pain that lasts more than a few minutes, or chest pain with sweating, nausea, fainting or pain spreading to your arm, jaw or back.

Who Is Most at Risk?

Stress affects everyone, but some people face a higher risk of heart effects:

  • People who already have heart disease, including those recovering from a heart attack or heart procedure
  • Women, who are more likely to experience broken heart syndrome and stress-related reductions in heart blood flow. Read about women’s heart attack symptoms.
  • Veterans and others with PTSD, which keeps the stress response persistently activated. See heart disease in veterans.
  • Caregivers and people facing financial strain, job insecurity, discrimination or social isolation
  • People with depression or anxiety

8 Proven Ways to Lower Stress and Protect Your Heart

You can’t eliminate stress, but you can change how your body responds to it.

  • Move every day. Regular physical activity is one of the most effective ways to relieve stress and directly lowers blood pressure. Even a 10-minute walk helps. See our guide to heart-healthy exercises. 
  • Prioritize sleep. Aim for 7 to 8 hours a night. Keep your bedroom cool, dark and quiet, and avoid alcohol and heavy meals close to bedtime.
  • Practice slow breathing. Breathing slowly and deeply, about six breaths a minute, calms the stress response within minutes. Try inhaling for 4 seconds and exhaling for 6.
  • Try mindfulness, meditation or yoga. Even 10 to 15 minutes a day can lower perceived stress and may help lower blood pressure.
  • Stay connected. Strong relationships buffer the effects of stress. Make time for friends, family and community.
  • Limit alcohol and caffeine. Both can worsen anxiety, disrupt sleep and raise blood pressure.
  • Set boundaries. Say no when you need to, delegate where you can, and build breaks into your day.
  • Get professional help. Counseling, cognitive behavioral therapy and, when needed, medication can effectively treat chronic stress, anxiety and depression. Treating your mind is part of treating your heart.

If you’ve had a heart attack or heart procedure, cardiac rehabilitation combines exercise, education and stress management, and is one of the best ways to recover.

When to See a Doctor

Talk with your doctor or a cardiologist if you have:

  • Palpitations, chest discomfort or shortness of breath during stress
  • Blood pressure that stays above 130/80
  • Stress that’s affecting your sleep, work or relationships
  • Heart disease along with depression or anxiety

For a full list of symptoms that deserve a heart evaluation, see the 10 warning signs you should see a cardiologist.

If you’re in crisis or having thoughts of harming yourself, call or text 988 to reach the 988 Suicide & Crisis Lifeline, available 24 hours a day.

Frequently Asked Questions

Can stress cause a heart attack? Yes, in people who already have plaque in their arteries. A sudden intense emotion can trigger a heart attack by raising heart rate, blood pressure and clotting. Over the long term, chronic stress also contributes to the high blood pressure and artery inflammation that lead to heart disease.

Can stress cause chest pain without a heart problem? Yes. Stress and anxiety can cause chest tightness from tense chest muscles, rapid breathing or panic attacks. However, chest pain should never be assumed to be “just stress” without a medical evaluation, especially if you have heart risk factors.

Can stress cause high blood pressure? Stress causes temporary spikes in blood pressure. Over time, chronic stress and the habits that come with it, such as poor sleep, alcohol use and inactivity, can contribute to lasting high blood pressure.

Can stress cause heart palpitations? Yes. Stress hormones can cause a racing heart, a pounding sensation or skipped beats. Most stress-related palpitations are harmless, but see a doctor if they’re frequent or come with dizziness, fainting, chest pain or shortness of breath.

Does reducing stress actually help my heart? Yes. Lower stress supports healthier blood pressure, better sleep and healthier habits. Exercise, in particular, reduces stress and lowers heart risk at the same time.

Protect Your Heart From the Effects of Stress

If stress is taking a toll on your health, or if you have palpitations, chest discomfort or rising blood pressure, a heart evaluation can give you answers and peace of mind. Our board-certified cardiologist takes a whole-person approach, addressing blood pressure, cholesterol and lifestyle along with the stress that affects them.

Request an appointment or call (813) 540-4322.

602 S Audubon Ave, Suite A, Tampa, FL 33609

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The content provided on the Ascent Cardiology website is intended for general educational and informational purposes only. The information, articles, and media presented on this website do not constitute medical advice, diagnosis, or treatment recommendations. Content published on this website is not intended to replace consultation, evaluation, or treatment by qualified healthcare professionals, including the providers at Ascent Cardiology or other licensed medical professionals.

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