Predictors of Complete Heart Block After Transcoronary Ablation of Septal HypertrophyResults of a Prospective Electrophysiological Investigation in 172 Patients With Hypertrophic Obstructive Cardiomyopathy
Thorsten Lawrenz, MD*,*,
Frank Lieder, MD ,
Markus Bartelsmeier, MD*,
Christian Leuner, MD*,
Bianca Borchert, MD*,
Dorothee Meyer zu Vilsendorf, MD*,
Claudia Strunk-Mueller, MD*,
Jens Reinhardt, MD*,
Andre Feuchtl, MD*,
Christoph Stellbrink, MD, FACC* and
Horst Kuhn, MD, FESC*
* Klinikum Bielefeld-Mitte, Department of Cardiology and Internal Intensive Care, Bielefeld, Germany
Raphaelsklinik Muenster GmbH, Medical Clinic I, Muenster, Germany.
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Figure 1 Changes in Intracardiac Conduction During TASH
Changes in intracardiac conduction before (ruled bars) and after TASH (open bars). AH = atrium-to-proximal-His; AV = atrioventricular; AVN = atrioventricular node; HV = distal-His-to-ventricle; TASH = transcoronary ablation of septal hypertrophy; WP ante = antegrade Wenckebach point.
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Figure 2 Prevalence of BBB
Occurrence of bundle branch block (BBB) before (upper panel) and after TASH (lower panel). LBB = left bundle branch; RBB = right bundle branch; TASH = transcoronary ablation of septal hypertrophy.
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Figure 3 Intraprocedural Complete Heart Block
Example of the development of intraprocedural complete heart block. Intracardiac His bundle ECG and surface ECG during TASH. (Left) Absence of complete heart block immediately before ethanol injection. (Right) Infra-His block after ethanol injection. Sinus rhythm was restored spontaneously after 5 min in this patient. A = atrial potential; ECG = electrocardiogram; His = His potential; TASH = transcoronary ablation of septal hypertrophy; V = ventricular potential.
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