Clinical Sciences QOD

A - Abnormal myocardial cells that are fibrillating are cauterized

B - Shock stops all cells in heart simultaneously. Allows pacemaker cells to regain control of myocardial contraction

C - Shock re-starts all myocardial cells at once, eliminating the unorganized rhythm and poor contractility seen with fibrillation

D - Shock accentuates strength of depolarization wave generated by pacemaker cells. They overwhelm fibrillation waves and restart cardiac rhythm