Patients often feel tightness in the chest accompanied by an accelerated heartbeat. 1. Cardiogenic factors should be considered, such as coronary heart disease, unstable angina, myocarditis, heart valve disease, hypertrophic obstructive cardiomyopathy, hypertensive heart disease, rheumatic heart disease myocarditis, pericarditis, etc. 2. Endocrine metabolic diseases should also be considered, such as hyperthyroidism and hyperadrenocorticism. 3. The patient may also experience chest tightness accompanied by an accelerated heartbeat. 4. If the patient has cardiac neurosis when there is a disorder of the vegetative nerves, he may also experience the above symptoms. 5.