What are the reasons for rapid heart rate? 140

Excessive heart rate may be caused by physiological factors, cardiovascular disease, endocrine disorders, drug effects, or anemia. If the resting heart rate continues to exceed 100 beats per minute, be alert to pathological factors.

1. Physiological factors:

Intense exercise, emotional excitement, or consumption of caffeinated beverages can temporarily increase heart rate. This type of situation usually resolves on its own after rest, typically manifested as a heart rate of 140-160 beats per minute without accompanying symptoms such as chest tightness and dizziness. Pregnant women may also experience physiological sinus tachycardia due to increased blood volume.

2. Cardiovascular diseases:

Arrhythmias such as atrial fibrillation and supraventricular tachycardia can directly cause heart rate abnormalities, often accompanied by symptoms such as palpitations and difficulty breathing. When patients with coronary heart disease experience myocardial ischemia, compensatory cardiac acceleration may reach more than 140 beats per minute, which requires clear diagnosis through electrocardiogram and echocardiography.

3. Endocrine disorders:

Patients with hyperthyroidism secrete excessive thyroid hormones, and their basal metabolic rate can increase to a resting heart rate of 120-140 beats per minute, accompanied by characteristics such as excessive sweating and weight loss. Sudden catecholamine release in pheochromocytoma can also lead to paroxysmal tachycardia.

4. Drug action:

Bronchodilators such as salbutamol and antidepressants such as venlafaxine may cause an increase in heart rate. Some cold medicines contain pseudoephedrine, and sensitive individuals may experience adverse drug reactions with a heart rate of around 140 beats per minute after taking the medicine. 5. Anemia and hypoxia: In moderate to severe anemia, the oxygen carrying capacity of the blood decreases, and the heart compensates for oxygen supply by increasing the number of beats. When the hemoglobin level is below 80g/L, it is common for the heart rate to continue at 120-140 beats per minute, which worsens after activity and is accompanied by typical symptoms such as pale complexion and fatigue.

It is recommended to monitor resting heart rate daily and avoid excessive intake of caffeine and alcohol. Continuous tachycardia requires comprehensive examinations such as blood routine, thyroid function, and dynamic electrocardiogram. Moderate aerobic exercise such as brisk walking and swimming can enhance heart function, and dietary attention should be paid to supplementing iron containing foods such as animal liver and spinach. Patients with hypertension should strictly control their daily salt intake to no more than 5 grams. Immediate medical attention is required when sudden heart rate of 140 beats per minute accompanied by chest pain and blurred consciousness.