The causes of sudden fibrillation of the heart during sleep include nerve dysfunction, cardiac arrhythmia, digestive diseases, hyperthyroidism, and so on.
1. Nerve dysfunction: when overworked, often stay up late will cause nerve function instability, resulting in increased nerve excitability, there will be a feeling of cardiac discomfort, if it is occasional, usually after rest will be better.
2. Arrhythmia: the feeling of heart fibrillation is related to arrhythmia, such as premature beats and conduction block caused by various organic diseases of the heart.
3. Digestive system diseases: Gastritis, gastroesophageal reflux, gastric ulcer can cause discomfort in the precordial area.
4. Hyperthyroidism: Hyperthyroidism leads to increased basal metabolic rate and cardiac complications.
If the symptoms are not relieved after proper rest and relaxation, you should consult a doctor promptly.