Is a heart rate between 100 and 120 normal

A resting heart rate of 100-120 beats per minute is considered tachycardia, which may be caused by physiological or pathological factors, mainly including failure to recover after exercise, emotional tension, anemia, hyperthyroidism, myocarditis, and other reasons.

1. Failure to recover after exercise:

After intense exercise, the heart rate may temporarily increase to 100-120 beats per minute, which is a normal physiological response. During exercise, the heart needs to deliver more oxygen to the muscles, and it usually gradually returns to normal within 30 minutes of rest. If there is no recovery for a long time, it is necessary to investigate whether there is dehydration or excessive fatigue.

2. Emotional tension:

Emotional fluctuations such as anxiety and stress can stimulate sympathetic nervous system excitement, leading to an increase in heart rate. This state may be accompanied by symptoms such as sweaty palms and rapid breathing, which can be alleviated through deep breathing or meditation. If the heart rate continues to increase for more than 2 hours, one should be alert to the possibility of anxiety disorders.

3. Anemia: When the hemoglobin level is below 110g/L, the oxygen carrying capacity of the blood decreases and the heart compensates for increased pulsation. Common symptoms such as pale complexion and fatigue require diagnosis through blood routine examination. Iron deficiency anemia can be improved by supplementing iron supplements, and severe anemia requires blood transfusion treatment.

4. Hyperthyroidism:

Excessive thyroid hormones can accelerate metabolism, manifested as increased heart rate, fear of heat and excessive sweating, and weight loss. Diagnosis can be confirmed by detecting FT3, FT4, and TSH. Antithyroid drugs such as methimazole are commonly used for control, and severe cases require radioactive iodine treatment.

5. myocarditis:

Viral myocarditis can cause sinus tachycardia, often accompanied by chest tightness and shortness of breath symptoms. The electrocardiogram shows ST segment changes and abnormal elevation of myocardial enzyme spectrum. Mild cases can self heal through bed rest, while severe cases require treatment with glucocorticoids.

It is recommended to monitor the resting heart rate in the morning on a daily basis, which should be 60-100 beats per minute for normal adults. Avoid consuming stimulating beverages such as strong tea and coffee, and regularly engage in aerobic exercises such as brisk walking and swimming to enhance heart function. If sustained tachycardia is accompanied by dizziness and chest pain, a 24-hour dynamic electrocardiogram examination should be performed in a timely manner. Menopausal women may experience heart rate fluctuations caused by autonomic nervous system disorders, which can be regulated by supplementing with glutathione. Elderly patients need to pay special attention to screening for arrhythmia diseases such as atrial fibrillation.