What causes sinus bradycardia

Sinus bradycardia causes are usually divided into physiological factors, vagus nerve center excitability increased, drug application, etc., specific analysis is as follows:

1. Physiological factors

If the human body is in sleep state, the body will protect itself to reduce energy consumption, leading to sinus bradycardia. Athletes and long-term physical labor patients, due to long-term exercise, cardiac function is stronger than normal people, in quiet will also appear sinus bradycardia, belongs to normal physiological phenomenon.

2. vagus nerve center excitability increased

If the patient suffers from meningitis, cerebral hemorrhage, brain tumor and other brain diseases, will lead to increased intracranial pressure, so that vagus nerve center excitability increased, causing sinus bradycardia.

3. Drug application

If the patient is applied amiodarone, digitalis and other drugs, will inhibit cardiac function, leading to sinus bradycardia.