What is Abnormally High LEWIS Index in an EKG exam?

What Is LEWIS Index In an EKG Exam?

LEWIS index describes the ratio between heart rate in bpm during atrial pacing versus sinus rhythm. It should not exceed approximately 1 in most situations

Abnormally High

Abnormal if index <1 (i.e., if atrial conduction > ventriculoarterial [ventricular plus arterial segment] interval during pacing, indicating an intact His–Purkinje system despite underlying disease)