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Heart Disease

Caution! Summer Heat Harmful for Heart Patients

The scorching summer heat and the discomfort that comes with it affects everyone, but for people with heart conditions, it could be a matter of life and death.

Experts urge people with cardiovascular disease to take extra precautions during the summer months to avoid major health problems.

It doesn't take a lot of exertion for those with heart conditions to become ill during hot weather spells. Strenuous activities in this weather can cause heat exhaustion or heat stroke in healthy individuals. Those who have heart problems have a two-fold chance of being affected by heat and can even die from extreme heat stress.

Heat and Our Bodies

Our bodies typically maintain a temperature of about 98.6 degrees, and the body instantly tries to cool itself down by sweating and dilating blood vessels if its temperature even rises slightly.

The evaporating sweat cools the body, and as a result of the larger blood vessel size, the heart beats faster and blood pressure decreases.

Increased heart rate and lower blood pressure can cause problems for those with heart disease.

It can be very stressful on the cardiovascular system. People with weaker hearts may not be able to pump blood efficiently enough to keep the body cool and the blood pressure at a high enough level. As a result, body temperatures may rise to dangerous levels.

Some medications taken by heart patients could also cause problems in extreme heat.

Beta-blockers, which are commonly prescribed to people with heart conditions, can prevent the heart from beating as rapidly as it needs to during hot weather, thereby limiting the body's ability to cool down.

Staying Healthy

In order to stay healthy in hot weather, people with heart disease should:

It is a good idea to check on friends, coworkers and loved ones regularly if the heart condition is really serious.

Taking the proper precautions can significantly reduce chances of suffering from heat-related illness. It's important to know your risks and to pay attention to your body's warning signs while still enjoying your summer.

This article originally appeared in UC Health Line (7/24/08), a service of the NetWellness.org Academic Health Center Public Relations Department and was adapted for use on NetWellness with permission, 2006.

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Last Reviewed: Jul 28, 2008

College of Medicine
University of Cincinnati