Radiofrequency catheter ablation of sustained monomorphic ventricular tachycardia in hypertrophic cardiomyopathy.
BACKGROUND
Incessant monomorphic ventricular tachycardia (VT) with a right bundle branch block morphology and a northwest axis is a rare arrhythmic complication in a patient with hypertrophic cardiomyopathy and apical left ventricular aneurysm.


RESULTS
The origin of this VT was localized using the following criteria: the presence of entrainment without fusion, equal intervals from the stimulus to the beginning of the QRS complex and from the electrogram to the QRS complex during VT, and the first postpacing interval identical to the tachycardia cycle length. Radiofrequency energy applied to the septoapical part of the apical left ventricular aneurysm terminated the tachycardia within 2 seconds.


CONCLUSIONS
Using criteria to guide radiofrequency (RF) ablation of VT in patients with coronary artery disease, an incessant monomorphic VT in a patient with hypertrophic cardiomyopathy was successfully ablated.
Rodriguez
L M
LM
Department of Cardiology, University Hospital Maastricht, The Netherlands. im.rodriguez@cardio.azm.nl
Smeets
J L
JL
Timmermans
C
C
Blommaert
D
D
van Dantzig
J M
JM
de Muinck
E B
EB
Wellens
H J
HJ
D000368:Aged; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D002312:Cardiomyopathy, Hypertrophic / Q000150:complications* / Q000601:surgery; D017115:Catheter Ablation / Q000379:methods; D004558:Electric Stimulation; D004594:Electrophysiology; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006322:Heart Aneurysm / Q000150:complications; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008790:Metoprolol / Q000627:therapeutic use; D010138:Pacemaker, Artificial; D011342:Procainamide / Q000627:therapeutic use; D017180:Tachycardia, Ventricular / Q000150:complications* / Q000601:surgery
D000889:Anti-Arrhythmia Agents; D008790:Metoprolol; D011342:Procainamide