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Description Coexistence of a manifest accessory pathway with AV nodal reentrant tachycardia. Tracings (top to bottom) are ECG leads (1, 2, V1), HRA CSp and CSd, and HB electrograms followed by T. The diagrams...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Transseptal activation during bundle branch reentrant tachycardia. A sustained bundle branch reentrant tachycardia is shown with a cycle length of 290 ms and left bundle branch block morphology. In...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Asystolic pause due to non‐conducted atrial impulses. A single lead electrogram obtained from an implantable cardiac loop recorder (Medtronic LINQ) is shown. The first two sinus beats are followed...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Concealed conduction unmasks other useful information. A three‐channel Holter monitor strip is shown for three separate patients. Panel A shows a segment of tachycardia with a CL of 460 ms. The...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Linking phenomenon. These panels represent different forms of LP, which is the primary mechanism of maintaining functional block. The top panel depicts a piece of conductive tissue being penetrated...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Atrial flutter with 2:1 AV conduction. Panel A is a 12‐lead ECG showing atrial flutter with an atrial CL of 200 ms and 2:1 AV conduction. Two sets of AV interval (F1‐R = 350 ms and F2‐R = 150 ms)...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description A unique form of AV nodal reentrant tachycardia with multiple pathways. Tracings from the top are surface ECG leads, 1, 2, and V1 followed by intracardiac electrograms obtained from HRA, CS, p, m,...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Unmasking dual pathways conduction by retrograde concealment. This ladder diagram depicts the presence of antegrade AV nodal FP and SP during sinus rhythm. As shown in scenario I, each sinus beat...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description (A) ECG diagnosis of double ventricular response. Top panel shows a pattern of group beating in two ECG leads (2 and V5). The bottom ladder diagrams represent three possible scenarios elucidating...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Nonreentrant supraventricular tachycardia. A segment of supraventricular tachycardia is shown in a patient with dual AV nodal pathways. The QRS complexes outnumber the sinus P waves 2 to 1. Each...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Abrupt doubling of ventricular rate due to interpolated extrasystoles. Panel A shows a segment of tachycardia produced by the interpolated JEIs alternating with SB. Note that the JEIs block...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Interplay of reentrant wavefronts propagated through the accessory pathway and AV nodal reentrant circuit. In the presence of coexistent AVNRC and an AP, a reentrant process propagating through...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Ashman's phenomenon during atrial fibrillation. Electrocardiogram leads show a segment of atrial fibrillation with narrow (#1, 2, and 7) as well as wide QRS complexes (#3–6, 8–17). The wide QRS...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Shift of AV nodal pathways by a premature ventricular complex. A two‐channel Holter monitor strip is shown. The rhythm is regular sinus with a cycle length of 660 ms. The first four beats are...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Coexistence of a manifest accessory pathway with AV nodal reentrant tachycardia. Tracings (top to bottom) are ECG leads (2, V1), HRA, CSp, HB, and RB electrograms followed by T. Tracings are from a...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Alternating functional bundle branch block during atrial bigeminy. Tracings from top to bottom are surface ECG leads V1 and the HB. A ladder diagram placed at the bottom depicts the relative...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Functional right bundle branch block in the 2nd beat of supraventricular tachycardia induced by burst ventricular pacing. Tracings are obtained from a patient with a posteroseptal AP. In panel A, a...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Potential influences of ventricular extrasystoles upon conduction of sinus beats. This ladder diagram represents several presumptive situations, in which a single (isolated) ventricular...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Spontaneous variations between narrow QRS and preexcited AV nodal reentrant tachycardia. Tracings (top to bottom) are ECG leads (1, 2, V1), HRA, CS from proximal to distal), HBp, and HBd...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Multiple tachycardias using concealed accessory pathways. Tracings (top to bottom) are surface ECG leads I, II, and V1 followed by intracardiac electrograms obtained from HRA, CS, and HB. The...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Pacemaker‐mediated tachycardia and concealed reentry. Tracings are shown from a patient with nonischemic cardiomyopathy and a low left ventricular ejection fraction with ICD device in place....
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Functional left bundle branch block in the 2nd supraventricular tachycardia complex induced by bundle branch reentry. Tracings are obtained from the same patient as in Figure . In panel A,...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description (A) A run of tachycardia showing wide and narrow QRS complexes. A 12‐lead ECG of a run of tachycardia between two sinus beats (arrows) is shown. Of note, both wide QRS complexes and narrow QRS...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Resolution of functional block. The top diagram shows maintenance of functional block attributable to linking by interference (see Figure ). This is achieved by a set of antegrade (A) and...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Multiple tachycardias using manifest accessory pathways. Tracings (top to bottom) are surface ECG leads I, II, and V1 followed by intracardiac electrograms obtained from HRA, CS, and HB, followed...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Dual reentrant circuits. This is a schematic representation of two reentrant circuits sharing a common pathway (pathway B). The reentrant impulses generated in the manifest circuit (comprised of...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Initiation of orthodromic reentry by premature ventricular impulse. Tracings are from a patient with a left‐sided AP. Premature ventricular stimulation (S1‐S2) is done at a S1‐S1 cycle length of...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Initiation of AV nodal reentry upon cessation of atrial pacing. Tracings are obtained from a patient with typical AVNRT. Incremental atrial pacing from the HRA at cycle lengths of 400 ms to 360 ms...
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Resolution of block by migration of the linking site. Diagrams I–IV depict the schematic representation of dual AV nodal pathways during retrograde conduction of a paced ventricular impulse (Vp)....
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology -
Description Initiation of orthodromic reentry upon cessation of atrial pacing. Tracings are obtained from a patient with a manifest posteroseptal AP. Incremental atrial pacing with CL of 300–280 ms is shown....
Article Title: Role of concealed conduction and allied phenomena in the genesis, maintenance, and termination of cardiac arrhythmias
Publication Title: Pacing and Clinical Electrophysiology