Pacemaker Potential
• Sinoatrial node (SA) cells are the primary pacemaker site within the heart.
• Characterized as having no true resting potential, instead they generate
regular, spontaneous action potentials (PACEMAKER POTENTIAL).
• The depolarizing current is carried into the cell primarily by relatively slow
Ca2+currents
• Results in slower action potentials in terms of how rapidly they depolarize.
• Therefore, these pacemaker action potentials are often referred to as "slow
response" action potentials
• Sinoatrial node (SA) cells are the primary pacemaker site within the heart.
• Characterized as having no true resting potential, instead they generate
regular, spontaneous action potentials (PACEMAKER POTENTIAL).
• The depolarizing current is carried into the cell primarily by relatively slow
Ca2+currents
• Results in slower action potentials in terms of how rapidly they depolarize.
• Therefore, these pacemaker action potentials are often referred to as "slow
response" action potentials
