07/14/2025
Heat, Haze, and Heart Risk
Extreme heat and poor air quality can put extra stress on the heart, says Dr. Brad Dibble, a cardiologist with PACE Cardiology. “Together, they pose a serious risk — especially for people with heart conditions.”
🫁 Why Poor Air Quality Is Hard on the Heart
“Just like with smoking, pollutants in the air can enter the bloodstream, causing inflammation and damage to blood vessels,” explains Dr. Dibble. “Reduced oxygen in polluted air also forces the heart to work harder — especially dangerous for those with heart failure or coronary artery disease.”
Pollution can also trigger arrhythmias, angina, or even heart attacks in vulnerable individuals.
🔥 Why Extreme Heat Is Hard on the Heart
“Heat causes blood vessels to widen, lowering blood pressure and increasing heart rate to compensate,” says Dr. Dibble.
Dehydration can thicken the blood, making the heart work harder to pump it. Excessive sweating can also deplete electrolytes, potentially triggering heart rhythm abnormalities.
“Heart medications like beta-blockers and diuretics can reduce the body’s ability to cool down or retain fluids,” he adds.
How to Protect Your Heart in Poor Air Quality and Extreme Heat
🫁 Poor Air Quality Tips
Stay indoors: Avoid outdoor activities, especially strenuous ones.
Use an air purifier: Especially if you have heart or lung disease.
Check the AQI (Air Quality Index): Monitor daily air quality using apps or websites.
Keep medications handy: Always take your heart medications as prescribed.
Watch for symptoms: Shortness of breath, chest pain, or unusual fatigue may signal a heart issue.
🔥 Extreme Heat Tips
Avoid peak heat: Stay indoors between 11 a.m. and 4 p.m.
Hydrate well: Drink plenty of water, even if you’re not thirsty.
Stay cool: Use fans, air conditioning, or cool showers.
Dress appropriately: Wear breathable, loose-fitting clothing.
Limit alcohol and caffeine: These can increase dehydration and can promote rhythm abnormalities for those at risk.