How do boys listen to girls' heartbeats?

Heartbeat, as the name implies, is the beating of the heart. The right atrium receives venous blood from the whole body and pumps it out of the pulmonary artery through the right ventricle. At this time, venous blood flows in the pulmonary artery, becomes arterial blood rich in oxygen through gas exchange in the lung, is sent to the left atrium from the pulmonary vein, and is pumped to various tissues and organs of the whole body through the aortic pump of the left ventricle to meet the needs of normal physiological activities.

An adult's heartbeat is about seventy or eighty beats per minute, which is normal between 60- 100. In normal times, if an adult's heartbeat exceeds 100 times per minute when he is quiet, it is medically considered as "tachycardia"; Less than 60 times is "bradycardia". Jump faster at work than at rest, women jump faster than men, children jump faster than adults, and newborns can jump 150 times per minute.

Causes of abnormal heartbeat

Physiology: Physiological sinus tachycardia is very common, and there are many factors that affect the heart rate, such as body position change, physical activity, food digestion, emotional anxiety, pregnancy, excitement, fear, excitement, drinking, smoking and drinking tea, which can increase the heart rate. In addition, age is also a factor, and children's heart rate tends to be faster.

The above content comes from Baidu Encyclopedia-Heartbeat