I lie down with my heart pounding and I can't sleep

A normal person's heart rate should be within a normal range, but some people sometimes feel their heart pounding. There are many reasons that cause your heart to pound, which may be physiological or pathological. Different people's hearts start beating at different times. Some people's hearts start beating as soon as they lie down, making it difficult for them to fall asleep. So what is the cause of this situation?

An adult's heart rate exceeding 100 beats per minute is called tachycardia (generally referring to sinus rhythm). There are many causes of tachycardia. In addition to physiological factors, common pathological factors are:

(1) Cardiovascular factors: such as active myocarditis, heart failure, etc., can compensate and cause an increase in heart rate. Rapid arrhythmias caused by various heart diseases, such as paroxysmal tachycardia, atrial fibrillation, etc.;

(2) Mental factors: such as cardiovascular dysfunction and sympathetic nerve overexcitation, such as patients with β-receptor hypersensitivity, often show tachycardia, accompanied by symptoms such as inattention, shortness of breath after exercise, and cold palms. Tachycardia in menopausal syndrome is also the result of autonomic nervous system dysfunction;

(3) Hyperthyroidism: Due to the increase in basal metabolic rate and hyperfunction of the sympathetic nervous system, the heart rate increases, and sometimes premature beats or atrial fibrillation may occur. The patient may also sweat a lot and feel cold or hot;

(2) Anemia: Anemia due to various reasons can cause accelerated circulation and compensatory heart rate.

(3) Fever, infection, increased metabolism, which can increase the heart rate; wasting diseases such as tuberculosis and tumors can also increase the heart rate;

(4) Hypoglycemia: 70% of cases are functional and often recur. Hypoglycemia can reflexively cause excessive secretion of adrenaline, resulting in tachycardia, palpitations, sweating, weakness, anxiety, etc.

(5) Pheochromocytoma: It is a tumor of the adrenal cortex that secretes excessive adrenaline, causing paroxysmal palpitations, sweating, cold limbs, tachycardia, and high blood pressure.

(8) Drug factors: such as after treatment with drugs such as atropine, epinephrine, and isoproterenol.

When the human body is stimulated by cold, it can reflexively cause blood vessels to constrict and the heart rate to accelerate. Supraventricular tachycardia can also be induced by cold factors.