What is plateau in cardiac action potential?

Phase 2. This phase is also known as the “plateau” phase due to the membrane potential remaining almost constant, as the membrane slowly begins to repolarize. This is due to the near balance of charge moving into and out of the cell.Click to see full answer. Also question is, what causes the plateau phase of the cardiac action potential?Phase 2 is the plateau phase of the cardiac action potential. Membrane permeability to calcium increases during this phase, maintaining depolarization and prolonging the action potential. As calcium channels inactivate towards the end of the plateau phase, an inward potassium current produces repolarization in phase 3.Beside above, what is the plateau phase in the heart? Phase 2 is the plateau phase, in which the movement of calcium ions out of the cell maintains depolarization. It gets its name because the electrical charge across the membrane changes very little in this phase. Thereof, what are the phases of the cardiac action potential? The top panel from atrial (left) and ventricular (right) myocytes. The five phases of the action potential (AP) are labeled: 0, upstroke of the AP represents depolarization of the membrane; 1, initial repolarization; 2, plateau phase; 3, late repolarization phase; and 4, the resting (diastolic) phase.What is mostly responsible for the the plateau in the cardiomyocyte action potential?The L-type calcium current (ICa-L) is the main charge carrier responsible for maintaining the action potential plateau during phase 2.