Stimulation of the sympathetic branch of the autonomic nervous system will cause an increase in the slope of phase four, effectively increasing the spontaneous conduction of the myocardium, which is called ____.

Question

Quizplus · Accepted Answer

Stimulation of the sympathetic branch of the autonomic nervous system increases the heart rate by increasing the slope of phase 4 depolarization in pacemaker cells, which is referred to as "accelerated automaticity." This leads to a faster generation of action potentials and thus an increased heart rate.

Stimulation of the Sympathetic Branch of the Autonomic Nervous System