The standard heart rate range is 60-100 beats per minute. If it is greater than 100 beats per minute, it is called tachycardia. If it is less than 60 beats per minute, it is called bradycardia. However, people who do heavy physical work for a long time and athletes may have a slightly slower heart rate of about 50-60 beats per minute. If the heart rate is consistently lower than 50 beats per minute, it is called significant bradycardia, which requires a search for the cause of the bradycardia, such as the presence of myocarditis, acute myocardial infarction, electrolyte disorders, hypothyroidism, etc.