Heart rate of 91 beats per minute within the normal range, such as no special discomfort, generally normal phenomenon; however, if atrial fibrillation or organic heart lesions, the need for timely diagnosis and treatment. The pacing point of the normal human heartbeat is located in the sinus node, with a frequency of 60 to 100 beats per minute. When the frequency of sinus heart rate is more than 100 times/minute, it is called sinus tachycardia, which can be seen in normal people after activities and emotional excitement, and can also be seen in anemia, hyperthyroidism, fever patients. When the frequency of sinus heart rate is less than 60 beats/minute, it is called sinus bradycardia, which can be seen in healthy young people, athletes and sleep. In addition, when there are heart beats originating outside the sinus node, such as atrial fibrillation, atrial premature beats, ventricular premature beats, etc., the heart rate can also be 91 beats/minute, which can be clarified by an electrocardiogram and other related tests. The heart rate of 91 beats/minute is generally normal, if accompanied by panic palpitations and other discomforts, it is necessary to go to the hospital in time for further examination and treatment, so as not to delay the condition.