11. Changes in the ventricular repolarization in Chagas disease are likely due to myocardial ischemia. 12. Class 1b drugs lengthen phase 3 repolarization . 13. Each Cl " ions also diffuse into the sarcoplasm to aid the repolarization phase. 14. This delayed repolarization may promote reentrant arrhythmias. 15. Repolarization of the ventricle happens in the opposite direction of depolarization and is negative current.16. Repolarization depends on a selective potassium current.17. It also appears to slow the rates of depolarization and repolarization of muscle cell membranes. 18. This property helps eliminate repolarization dispersion, a proarrhythmial effect noted in class III agents. 19. Absolute refractory period corresponds to depolarization and repolarization , whereas relative refractory period corresponds to hyperpolarization. 20. Repolarization typically results from the movement of positively charged K + ions out of the cell.
