WAVEFORMS:     The curves, lines and shapes on an ECG that indicate electrical events during heartbeats.   •See individual waveforms (e.g. P wave, Q wave, QRS complex, ST segments, T waves, U waves).

WENCKEBACH:     See second degree atrioventricular (AV) block Mobitz type 1 (Wenckebach).

WILSON’S CENTRAL TERMINAL (WCT):     An artificially constructed reference point, representing the negative pole for unipolar ECG leads. It is produced by averaging the measurements from the right arm electrode, the left arm electrode and the left leg electrode to give an average potential across the body.

WOLFF PARKINSON WHITE:     A syndrome caused by a symptomatic arrhythmia caused by preexcitation. •ECG Findings: •Delta wave; short PR interval; widened QRS complex. •Orthodromic Conduction: •Conduction into the ventricles goes down the AV node normally, and the reentrant conduction goes up the bypass tract. •Antidromic Conduction: •Conduction into the ventricles goes down the […]