The cardiocyte in figure 19.14 has a absoute refractory period of approximately 0.20 seconds. Assuming all of the cells in the heart have the same absolute refractory period, what would be the maximum heart rate in beats per minute?
During an absolute refractory period no stimulus of any strength will trigger a new action potential. Within 60 seconds the cardiocyte will produce an action potential every 0.20 seconds. 60s/0.20s= 300bpm