A fast heart rate in hot weather may be normal, but it is not absolute, and some patients may have tachycardia caused by pathology.
Hot weather will lead to the body’s metabolic rate increases, the body will sweat a lot, resulting in vasodilatation and accelerated blood circulation, in order to meet the needs of the body, the heart rate will be compensatory increase, but the heart rate increase will not be too much, usually in about 10 times / min, this situation is normal.
Hot weather heart rate significantly faster may be abnormal, for example, the body happens to suffer from hyperthyroidism, myocardial ischemia, fever, anemia and other diseases in the summer, will cause a pathological increase in heart rate.
Heart rate in hot weather is accompanied by other discomforts and timely medical treatment to avoid the occurrence of adverse sequelae.