What causes a fast heartbeat?

Generally, a fast heartbeat may be caused by intense exercise, dietary factors, hyperthyroidism, arrhythmia, myocarditis, etc. If you experience any discomfort, seek medical attention promptly and receive symptomatic treatment under the guidance of a qualified physician. Specific causes are analyzed as follows:

1. Intense Exercise

Long periods of high-intensity exercise increase the oxygen demand of muscles. To meet the body's needs for oxygen and nutrients, the heart rate increases. During exercise, it is important to monitor training intensity and allow adequate rest afterward; heart rate will gradually return to normal.

2. Dietary Factors

Consumption of stimulants such as caffeine and alcohol can affect the heart's electrical activity and stimulate the heart, leading to an increased heart rate. It is recommended to adjust your diet accordingly and reduce intake of coffee and alcohol.

3. Hyperthyroidism

Abnormal iodine intake may lead to hyperthyroidism, resulting in excessive thyroid hormone production, which increases cardiac excitability and causes tachycardia. Symptoms such as insomnia and anxiety may also occur. Follow your doctor’s instructions to use medications such as methimazole tablets, propylthiouracil tablets, or carbimazole for treatment.

4. Arrhythmia

Poor lifestyle habits such as chronic sleep deprivation and excessive alcohol consumption may lead to arrhythmia, causing abnormal conduction of electrical signals in the heart and resulting in a rapid heartbeat. Symptoms such as palpitations and anxiety may also accompany this condition. Medications such as verapamil hydrochloride tablets, diltiazem hydrochloride, or amiodarone hydrochloride tablets may be used under a doctor's advice.

5. Myocarditis

Viruses or bacteria may enter the myocardial cells via the bloodstream, causing inflammation of the heart muscle, affecting the heart's electrical activity and contractile function, and leading to tachycardia. Symptoms such as fever and shock may also occur. Under medical supervision, medications such as acyclovir dispersible tablets, tenofovir alafenamide fumarate tablets, or trimetazidine hydrochloride tablets may be used for treatment.

To maintain good health, it is important to stay emotionally balanced, avoid overexertion and strenuous exercise, eat a balanced diet, and reduce consumption of caffeine and alcohol. Additionally, regular physical examinations can help detect and treat potential health issues early.