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What is Delayed afterdepolarization implies? and explain in detail?
Ans. is 'd' i.e., All of the aboveDelayed afterdepolarizations occur in late phase 3 or early phase 4 when the action potential is nearly of fully repolarized.The mechanism is poorly understood; however, this type of arrhythmia is found to be associated with high intracellular Ca++ concentrations as occurs with digitalis toxicity or excessive catecholamine stimulation.The triggered impulse can lead to a series of rapid depolarizations (i.e. a tachyarrhythmia).