What does sinus arrhythmia mean by accompanying bradycardia?

Sinus arrhythmia with bradycardia generally refers to bradycardia on the basis of arrhythmia.

Normal adult heart rate should be 60-100 beats per minute, when the heart rate is lower than 60 beats/min, it can be called sinus bradycardia, if in this premise, there are also changes in heart rhythm, it is called sinus arrhythmia with bradycardia, may be due to physiological factors, such as environment, exercise, mood, etc.; may also be caused by pathological factors, such as hypothyroidism, coronary atherosclerotic heart disease, etc.