RCES Practice Questions - Registered Cardiac Electrophysiology Specialist Exam

Which definition correctly describes the effective refractory period (ERP) of cardiac tissue?

The longest S1-S2 coupling interval that fails to propagate The shortest interval at which the tissue can be paced 1:1 The interval during which a stimulus produces a normal action potential The interval before the tissue fully repolarizes to threshold

Correct Answer:

The longest S1-S2 coupling interval that fails to propagate

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