If the heart rate is 50 beats/minute, it is not normal in the resting state. A person’s normal heart rate at rest ranges from 60-100 beats/min, so if a patient has a heart rate of 50 beats/min at rest, he or she is bradycardic. If it is simple sinus bradycardia and the patient is not currently experiencing any uncomfortable symptoms, special interventions are often not needed. However, if it is below 50 beats/min in the awake state, the cause must be actively identified. If the bradycardia is recent, find out if it is due to the presence of hyperkalemia or hypothyroidism. If the patient has a heartbeat of 50 beats per minute while sleeping, this is considered normal. This is normal because the heart rate is slower during rest, sleep, and especially deep sleep than during wakefulness, because the heart also needs to rest. So relatively during sleep, the heart will beat slower to achieve the purpose of rest.