Inquiry
Hello Doctor,
I often experience shortness of breath during extremely hot weather, accompanied by symptoms of tachycardia and an unstable heart rate. Could you please clarify whether experiencing shortness of breath and rapid heart rate in hot weather is concerning? I have undergone examinations, and everything appears to be normal. Thank you.
Anonymous Patient
Response
Addressed by Dr. Phan Dinh Thuy Tien - Department of General Medicine & Internal Medicine, Vinmec International General Hospital Nha Trang.
Hello,
In response to your query regarding "shortness of breath and tachycardia in hot weather ?" I would like to explain as follows:
In conditions of elevated temperatures, all activities and metabolic processes in the body are affected. To adapt to hot weather, the body compensates by increasing sweat production and dilating peripheral blood vessels. When excessive sweating occurs, the body loses water and blood volume decreases, while the heart must continue to contract sufficiently to circulate blood throughout the body. As blood volume diminishes, the heart is required to work harder, increasing both contractility and heart rate. Furthermore, during physical exertion, excessive sweating and fluid loss necessitate increased blood supply to the working muscles.
When excessive fluid loss occurs, body temperature may rise, leading to potential organ damage, particularly to the nervous system and cardiovascular system. Patients may experience fatigue, disorientation, lack of concentration, rapid heartbeat, and elevated blood pressure. It is advisable to seek early consultation with a cardiologist to screen for any underlying cardiovascular disease, if present, thus allowing for appropriate treatment and prevention strategies to manage conditions that may worsen due to heat exposure.
You should stay indoors during the hottest periods, especially between 10 AM and 3 PM. If possible, remain in a location with air conditioning, and wear loose, comfortable clothing. If it is necessary to go outside, ensure you wear light, breathable clothing and a hat. If travel is not imperative, try to schedule outings during early morning or late evening hours. Avoid overeating; opt for easily digestible, liquid foods while limiting salt intake. It is advisable to consume ample fresh fruits such as oranges, lemons, bananas, and grapes to adequately replenish electrolytes. Additionally, refrain from consuming alcohol, caffeinated beverages, and ensure to adhere strictly to your prescribed medication regimen. Sufficient hydration is recommended, roughly 2 liters of fluid per day (including fluids ingested during meals).
However, it is important to note that individuals with heart failure should avoid excessive fluid intake, as this could increase the burden on the cardiovascular system. Cardiac patients should monitor their weight daily to appropriately balance fluid intake; for instance, a weight loss of 1 kg corresponds to the loss of approximately 1 liter of fluid, necessitating equal fluid replacement. Physical exertion outdoors in hot weather should be limited to prevent fluid loss and reduce cardiovascular strain.
Should you have further inquiries regarding shortness of breath and tachycardia in hot weather, you may visit a hospital within the Vinmec Healthcare System for further evaluation and consultation. Thank you for trusting us and for your inquiry to Vinmec. Wishing you good health.
Sincerely!
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