What's with the tightness in the heart?

Heart contractions may be caused by factors such as cardiac neurosis, myocarditis, angina pectoris, etc. The specific analysis is as follows:

1. Cardiac neurosis

After the occurrence of cardiac neurosis, nervous function will be out of balance, leading to accelerated myocardial contraction, there will be a sense of contractions in the heart.

2. Myocarditis

Myocarditis will cause myocardial congestion, edema, exudation, resulting in increased myocardial friction, myocardial contraction and relaxation, there will be a sense of contractions.

3. Angina pectoris

After the occurrence of angina pectoris, coronary ischemia, local myocardial necrosis, necrotic metabolites stimulate the myocardium, causing myocardial spasm, resulting in a sense of contractions.