5 ways to protect your heart in extreme heat

“Some heart medications like angiotensin receptor blockers (ARBs), angiotensin-converting enzyme (ACE) inhibitors, beta blockers, calcium channel blockers and diuretics, which affect blood pressure responses or deplete the body of sodium, can exaggerate the body’s response to heat and cause you to feel ill in extreme heat,” added Lloyd-Jones, whose term as president began July 1. “But don’t stop taking your prescriptions. Learn how to keep cool and talk to your doctor about any concerns.”

Even if you aren’t taking medications for a heart condition, it is important to take precautions in the heat. While infants and the elderly are more vulnerable to problems from heat, extreme temperatures can cause health issues for anyone.

“Staying hydrated is key. It is easy to get dehydrated even if you don’t think you’re thirsty,” Lloyd-Jones said. “Drink water before, during and after going outside in hot weather. Don’t wait until you feel thirsty. And the best way to know if you are getting enough fluid is to monitor your urine output and make sure the urine color is pale, not dark or concentrated.” 

Dehydration causes the heart to work harder, putting it at risk. Hydration helps the heart more easily pump blood through the blood vessels to the muscles. And it helps the muscles work efficiently.

The American Heart Association suggests that everyone follows these top 5 hot weather precautions:

  • Watch the clock: It’s best to avoid the outdoors in the early afternoon (about noon to 3 p.m.) because the sun is usually at its strongest, putting you at higher risk for heat-related illnesses.
  • Dress for the heat: Wear lightweight, light-colored clothing in breathable fabrics such as cotton, or a newer fabric that repels sweat. Add a hat and sunglasses. Before you get started, apply a water-resistant sunscreen with at least SPF 15, and reapply it every two hours.
  • Drink up: Stay hydrated by drinking a few cups of water before, during and after going outside or exercising. Avoid caffeinated or alcoholic beverages.
  • Take regular breaks: Find some shade or a cool place, stop for a few minutes, hydrate and start again
  • Follow the doctor’s orders: Continue to take all medications as prescribed.

It’s important to know the signs and symptoms when you may be experiencing too much heat.

Symptoms of heat exhaustion:

  • headaches
  • heavy sweating
  • cold, moist skin, chills
  • dizziness or fainting (syncope)
  • a weak and rapid pulse
  • muscle cramps
  • fast, shallow breathing
  • nausea, vomiting or both

If you experience these symptoms, move to a cooler place, stop exercising and cool down immediately by dousing yourself with cold water and re-hydrating. You may need to seek medical attention.

Symptoms of heat stroke:

  • warm, dry skin with no sweating
  • strong and rapid pulse
  • confusion and/or unconsciousness
  • high fever
  • throbbing headaches
  • nausea, vomiting or both

If you experience these symptoms, seek medical attention right away. Heat stroke is not the same as a stroke. Stroke happens when a blood vessel to the brain either bursts or is blocked by a clot, causing a decrease in oxygen flow to the brain.

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