The plateau phase of the ventricular myocyte action potential is dominated by the inward flow of calcium ions and the outward flow of potassium ions. The ventricular myocyte action potential has depolarization and repolarization processes, which are formed by the potential difference between the inside and outside of the ventricular myocyte membrane produced by the flow of charged particles. The plateau phase of ventricular myocyte action potential is the 2nd phase in the repolarization process of ventricular myocyte, when the potential difference of ventricular myocyte is close to 0mV, the calcium channel on the membrane of ventricular myocyte is open, and under the action of concentration difference between inside and outside of the membrane, calcium ions are slowly inwardly flowed, and at the same time a small amount of potassium ions are outwardly flowed, and in the late stage of the plateau the outflow of potassium ions is increased, and the potentials inside and outside of the membrane continue to be lowered, and the transition to the 3th phase is made, with an increase in the speed of repolarization. If you have any questions related to ventricular myocyte action potential, you can consult your doctor, and if you are in discomfort, you need to seek medical attention promptly.