Usually, the normal range of heart rate is 60 to 100 beats/min.

If the heart rate is greater than 100 beats/min, it is abnormal and is sinus tachycardia. The frequency is generally between 100 and 150 beats/min, sometimes reaching 200 beats/min. If the heart rate is less than 60 beats/minute, it is sinus bradycardia. Sinus tachycardia is not necessarily caused by disease. Temporary sinus tachycardia will occur if you drink coffee, strong tea, exercise, or drink a lot of alcohol. Sinus bradycardia is not necessarily caused by disease. For example, some athletes will have slower heartbeats. However, if abnormal heartbeat occurs frequently, it is best to go to the hospital for a clear diagnosis.

Standard heart rate

1. The resting heart rate of normal adults has significant individual differences, with an average of about 75 beats/min (between 60-100 beats/min). Heart rate can vary based on age, gender, and other physiological conditions. Newborn babies have a very fast heart rate, which can reach more than 130 beats/minute. In adults, women generally have a slightly faster heart rate than men. The same person's heart rate slows down when quiet or sleeping, and increases during exercise or emotional excitement. Under the influence of certain drugs or neurohumoral factors, the heart rate will speed up or slow down. People who regularly engage in physical labor and physical exercise usually have a slower heart rate. In recent years, a large-scale domestic healthy population survey found that the normal range of resting heart rate for Chinese men is 50-95 beats/min, and for women is 55-95 beats/min. Therefore, heart rate changes with age, gender and health status.

2. The heart rate of healthy adults is 60 to 100 beats/min, most of which are 60 to 80 beats/min, and women are slightly faster; children under 3 years old often have a heart rate of more than 100 beats/min; the elderly On the slow side. A heart rate exceeding 100 beats per minute in adults (generally no more than 160 beats/min) or a heart rate exceeding 150 beats/min in infants and young children is called sinus tachycardia. It is common in normal people after exercising, being excited, agitated, smoking, drinking alcohol and drinking strong tea. It can also be seen in fever, shock, anemia, hyperthyroidism, heart failure and the application of atropine, epinephrine, ephedrine, etc. If the heart rate is between 160 and 220 beats/min, it is often called paroxysmal tachycardia. A heart rate lower than 60 beats/min (usually above 40 beats/min) is called sinus bradycardia. It can be seen in athletes who have been engaged in heavy physical labor for a long time; pathologically, it can be seen in hypothyroidism, increased intracranial pressure, obstructive jaundice, and overdose or poisoning of digitalis, quinidine or propranolol drugs. If the heart rate is lower than 40 beats/min, atrioventricular block should be considered. A heart rate exceeding 160 beats/min or less than 40 beats/min is mostly seen in patients with heart disease. Patients often have palpitations, chest tightness, and precordial discomfort. They should undergo detailed examination as soon as possible to treat the cause. 3) The amount of blood output from the ventricles to the arteries each time the heart contracts is called stroke volume. The amount of blood output by the heart per minute is called output per minute. The stroke volume of a normal person at rest is 70 ml. If the heart rate Calculated based on 75 times per minute, the output volume per minute is approximately 5250 ml. Cardiac output is an indicator of the heart's working ability.