During the sweltering summer months, high temperatures can pose a significant risk to cardiovascular health. Dr. Pham Thu Thuy from the Department of Cardiology and Interventional Cardiology at Hanoi French Hospital explained that heat can cause a sudden drop in blood pressure, dysfunction of the autonomic nervous system, fatigue, and excessive sweating. These symptoms can lead to fainting, especially when engaging in sports or immediately after using the restroom.
Individuals who work long hours in the sun or engage in high-intensity exercise are more likely to experience fainting due to increased sweating and decreased water volume in their blood vessels, resulting in low blood pressure and reduced blood flow to the brain when standing up. Fainting caused by high temperatures can also be accompanied by symptoms such as dizziness, vertigo, headache, nausea, vomiting, diarrhea, decreased urination, and concentrated urine.
Those with underlying cardiovascular diseases are at a higher risk of fainting and other cardiovascular symptoms during the hot season. Dr. Thuy emphasized that it can be challenging to detect the cause of fainting in individuals without underlying health conditions. Dr. Alain Patrice Lebon further explained that conditions like arrhythmia, coronary artery disease, heart valve abnormalities, and pulmonary issues can be associated with fainting and may lead to life-threatening complications if not treated promptly.
It is essential to recognize early signs of fainting such as feeling unwell, tired, dizzy or lightheaded. If someone faints suddenly, it is crucial not to move them but instead lay them down with raised feet and call for emergency medical assistance. Preventative measures include staying hydrated by drinking plenty of water throughout the day; avoiding prolonged exposure to high outdoor temperatures; using cooling methods like air conditioning or fans; maintaining stable blood pressure through diet and hydration; and taking breaks frequently if engaging in strenuous activities outdoors.
While fainting is often not a severe concern on its own
