Is the lowest heart rate 49 beats/min normal?

If

the heart rate is measured in a relatively calm state, there are abnormal symptoms such as palpitations, palpitation, shortness of breath, chest tightness, and precordial discomfort, which are generally not normal. It may be related to coronary atherosclerotic heart disease, because this disease will affect the amount of blood returned to the heart, resulting in low heart function and affecting heart beating, so this phenomenon will occur.