WCardiac electrophysiology
WAntiarrhythmic agent
WArtificial cardiac pacemaker
WAsian Heart Institute
WAutomated external defibrillator
WBundle branch block
WBundle of His
WCable theory
WCardiac monitoring
WCardiac muscle
WCardiac pacemaker
WCardiac Pacemakers, Inc.
WCardiac resynchronization therapy
WCardiac transient outward potassium current
WConcealed conduction
WRoss Cowie
WDefibrillation
WEffective refractory period
WEinthoven's triangle
WElectrical conduction system of the heart
WElectrocardiography
WElectrocardiography in myocardial infarction
WForward problem of electrocardiology
WImplantable cardioverter-defibrillator
WKvLQT1
WLewis lead
WLibin Cardiovascular Institute of Alberta
WLifepak
WP wave (electrocardiography)
WPacemaker potential
WPan–Tompkins algorithm
WPR interval
WPurkinje fibers
WQRS complex
WQT interval
WQT interval variability
WRefractory period (physiology)
WSinoventricular conduction
WSinus arrhythmia
WST segment
WT wave
WTranscutaneous pacing
WU wave
WVentricular action potential