Can long exposure to heatwaves raise the risk of a deadly heart attack?

Long exposure to heat waves can lead to increased sweating to keep the body cool and that is made possible by increased blood supply to skin. Here loss of fluid in the body may lead to dehydration. Thus extreme heat may push your body to work harder to maintain a stable internal temperature, resulting in increased heart rate and blood flow.

So in summer the heart has to work harder to keep the body temperature in normal range. This places excessive stress on the heart and can even lead to deadly heart attacks. In addition exposure to extremely hot weather in mid day along with strenuous physical activity can also lead to heatstroke. People with underlying health conditions (such as diabetes, heart disease, hypertension or high blood pressure, lung disease, obesity, cancer and kidney disease) and elderly people are more prone to having a heart attack in extreme temperatures.

Besides, exposure to high temperatures may intensify dehydration, a condition that may weaken blood circulation and thickens the blood, making it harder for the heart to pump effectively. If left unattended, it may aggravate the risk of cardiovascular events (heart attacks, strokes, and heart failure) particularly among older people and those with compromised health.

According to Dr. Gajinder Kumar Goyal, Director-Cardiology, Marengo Asia Hospitals, Faridabad, "Heart patients should be extra cautious in summer because many patients are on diuretics and antihypertensive drugs. These drugs can lead to dehydration and risk of fainting. So adequate hydration is important and you also need to adjust the doses of medications with the consultation of your doctor."

Tips to keep your heart healthy during heat waves:

In order to keep you hydrated and maintain optimal blood circulation, you should drink plenty of water throughout the day. Refrain from excessive consumption of sugary or caffeinated beverages, as they can lead to dehydration.

To lower exposure to extreme heat, stay indoors during peak heat hours. You can take cool showers to reduce body temperature and alleviate stress on the heart.

Don't do strenuous exercise in hot conditions, and opt for workouts at home instead.

Stay in air conditioning to mitigate the effects of heatwaves.

Put on lightweight, loose-fitting clothing in breathable fabrics to ease heat dissipation and keep overheating in check.

While venturing out of the home, wear a wide-brimmed hat and apply sunscreen to protect from sun rays.

Eat a balanced diet including fresh fruits, vegetables, and whole grains as these provide essential nutrients and support heart health. Refrain from eating heavy, greasy meals that may worsen heat-related discomfort.

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