Cardiac Electrophysiology Flashcards
1
Q
The cardiac action potential
A
Phase 0; depolarisation due to increased permeability to Na+
Phase 1; Na+ channels quickly inactivate, repolarises
Phase 2; repolarisation is halted by opening of Ca2+ channels causing plateau phase
Phase 3; repolarisation begins with K+ channels opening
Phase 4; K+ channels open resting potential mainatined
