EKG Page
Ventricular Myocyte Depolarization & Repolarization
Class, Please review the PHASE, Name and what is happening in that phase of the depolarization & repolarization timeline of a ventricular myocyte. Then do the SELF-STUDY quiz below and check your work.
Phase 4: Restoring with the Na+K+ pump (Na+ extracellular, K+ intracellular), RMP is -90mV
Phase 0:
Depolarization; Influx of Na+ through FAST Na+ channels
Phase 1:
Early Rapid Repolarization: K+ efflux, Fast Na+ channels close
Phase 2:
Slow Repolarization (plateau phase): K+ efflux, influx of Ca++ and Na+ (SLOW Na+ channels)
Phase 3:
Final Rapid Repolarization: K+ efflux, Ca++ and SLOW Na+ channels close
SELF-STUDY QUIZ OF DEPOLARIZATION AND REPOLARIZATION TIMELINE.
Phase 4:

Phase 0:

Phase 1:

Phsee 2:

Phase 3: