1. The palpitation with enhanced myocardial contractility caused by heart beat can be physiological or pathological. Physiologically, they can be shown as follows: ① Healthy people are under strenuous exercise or excessive mental stress; 2 after drinking, strong tea or coffee; ③ Use some drugs, such as adrenaline, ephedrine, caffeine, atropine and thyroid tablets. Pathological cases appear in the following situations:

(1) Ventricular hypertrophy: hypertensive heart disease, aortic regurgitation, mitral regurgitation, etc. Leading to left ventricular hypertrophy and increased myocardial contractility. Patent ductus arteriosus and ventricular septal defect regurgitation increase the load on the heart, leading to ventricular hypertrophy and palpitation.

(2) Other diseases that cause increased heartbeat: ① Hyperthyroidism, which is due to the increase of basal metabolism and sympathetic nerve excitability, leads to an accelerated heart rate. ② Anemia, especially palpitation during acute blood loss. When anemia occurs, the oxygen carrying capacity of blood decreases. Hypoxia in organs and tissues. In order to ensure the supply of oxygen, the body compensates by raising the heart rate and increasing the output. Increased heart rate can lead to palpitations. 3 fever, at this time, the basal metabolic rate increases, the heart rate increases, and the cardiac output increases, which can also cause palpitations. ④ Hypoglycemia and pheochromocytoma lead to increased adrenaline release, increased heart rate and palpitation. throb with terror

Palpitation is a feeling of discomfort or palpitation caused by conscious heart beating. I feel uncomfortable when my heart rate increases, and I feel strong when my heart rate is slow. When flustered, the heart rate can be fast or slow, and there can be arrhythmia. People with normal heart rate and rhythm may also be flustered.