Heat waves are not just making you feel tired; they could be silently damaging your heart, according to doctors. As summer temperatures in India rise to unprecedented levels, health experts are raising alarms about the hidden cardiovascular risks associated with extreme heat.
The Heart Under Pressure
According to the India Meteorological Department (IMD), heat waves have become more frequent and intense over the past decade. A government-backed study published by the National Institutes of Health (NIH) found that exposure to extreme heat increases cardiovascular stress and raises the risk of heart-related complications, especially among older adults and those with pre-existing conditions.
How Heat Strains the Heart
When temperatures soar, blood vessels expand to release heat, and the heart pumps faster to maintain blood flow and regulate body temperature. Dr. Manish Bansal, Senior Director of Clinical & Preventive Cardiology at Medanta in Gurugram, explains: "When the body is subjected to extreme heat, it tries to cool itself by expanding blood vessels and increasing perspiration. The heart has to work harder to maintain circulation, which can lead to chest pain, irregular heartbeats, or worsening of pre-existing heart conditions."
Dehydration and Electrolyte Imbalance
Heavy sweating reduces blood volume and depletes essential electrolytes like sodium and potassium. This can cause blood pressure fluctuations, dizziness, and even dangerous heart rhythms. Dr. Bansal notes: "Prolonged heat exposure leads to loss of fluids and electrolytes, making the heart work harder and increasing the risk of palpitations or cardiac rhythm disturbances."
Heat Stroke: A Medical Emergency
Heat stroke occurs when the body loses its ability to cool down, leading to organ damage. Symptoms include rapid heartbeat, confusion, nausea, and chest discomfort. Research from the National Library of Medicine indicates that heat stroke can trigger inflammation and cardiac stress, potentially causing permanent damage if not treated promptly.
Vulnerable Groups at Higher Risk
People with existing heart conditions such as hypertension, heart failure, or coronary artery disease face greater dangers during heat waves. Even healthy individuals can experience pounding heartbeats, fatigue, or breathlessness. Dr. Bansal advises: "Those with heart diseases should not skip medications and should consult a doctor if they notice symptoms like chest pain, palpitations, or unusual fatigue."
Protective Measures
- Avoid direct sun exposure between noon and 4 p.m.
- Wear loose, cotton clothing to facilitate sweat evaporation.
- Eat lighter meals to reduce metabolic heat production.
- Stay hydrated, but consult a doctor for personalized plans if you have heart conditions.
- Check on elderly relatives living alone.
Recognizing early warning signs is crucial. As Dr. Bansal emphasizes: "The body whispers before it screams. Heat-related heart stress often begins with subtle symptoms that are easy to dismiss."
