Sinus bradycardia with arrhythmia is sinus bradycardia with sinus arrhythmia, which is commonly known as a slow heart rate with an irregular heartbeat. Normal human heartbeat pacing from the sinus node, this heart rhythm is called “sinus rhythm”, the adult quiet state heart rate per minute should be between 60-100 times, when the heart rate is lower than 60 times / min, known as sinus bradycardia. Under normal circumstances, the interval between each heartbeat is fixed, when this interval is sometimes long, sometimes short, the rhythm is irregular, known as arrhythmia. To summarize, when sinus bradycardia is accompanied by arrhythmia, it is called sinus bradycardia with arrhythmia. Sinus bradycardia with arrhythmia may be a physiologic phenomenon, and patients usually have no symptoms. In rare cases, sinus bradycardia with arrhythmia may be caused by myocardial ischemia, atrioventricular block, sinus node hypoplasia, etc. In such cases, it is recommended that the patient consult a doctor in time to find out the cause of the arrhythmia and treat it actively.