understanding intracardiac egms and ecgs achycardia: Wide QRS complexes, rapid rhythm AV block: Prolonged PR interval or complete dissociation between atrial and ventricular activity Pre-excitation syndromes (e.g., WPW): Short PR interval with delta wave Interpreting Intracardiac EGMs Key Components of EGM Analysis Signal amplitude: Refle L Lloyd Reynolds Jan 8, 2026
