The reasons for irregular heartbeat when lying down may include the following:
1. Changes in neural regulation: After lying down, the human body may experience changes in neural regulation, especially an increase in vagal nerve tone, which may lead to a slower or irregular heartbeat, making it easier to show arrhythmia.
2. Structural or functional problems of the heart: If there are organic lesions of the heart, such as cardiomyopathy, valvular heart disease, coronary heart disease, etc., changes in cardiac load when lying down may highlight symptoms of arrhythmia. Cardiac arrhythmias such as atrial fibrillation, irregular atrial flutter, and severe bradycardia may also lead to irregular heartbeats.
3. Other factors: Endocrine disorders, such as hyperthyroidism or hypothyroidism, can affect the electrophysiological activity of the heart, leading to arrhythmia. Drug effects: Certain drugs such as antiarrhythmic drugs, antidepressants, respiratory theophylline drugs, adrenaline drugs, etc., may cause or worsen arrhythmia. Environmental factors: High living environment temperature, poor air circulation, etc. may lead to dysfunction of the vagus or sympathetic nervous system, causing abnormal increase in heart rate. Hypoglycemia or Hypotension: When hypoglycemia occurs, the sympathetic nervous system will be compensatorily excited, leading to irregular heartbeat; Hypotension may lead to a decrease in blood supply to the myocardium, causing myocardial ischemia and resulting in irregular heartbeat.
The above information is for reference only and cannot replace professional medical advice. If the symptoms of irregular heartbeat occur frequently or are accompanied by obvious discomfort when lying down, timely medical attention should be sought, and relevant examinations such as electrocardiogram and cardiac ultrasound should be performed to clarify the cause and take corresponding treatment measures.