Abstract
A 61-year-old male patient was referred to our electrophysiology lab for ventricular tachycardia (VT) ablation. The patient had a history of ischaemic cardiomyopathy with impaired left ventricular function and received a dual chamber implantable cardioverter-defibrillator (ICD) after he survived a cardiac arrest. During the past months, the patient suffered from recurrent episodes of monomorphic VT with appropriate ICD therapies. Electrocardiogram suggested an apical origin of the VT. Prior to VT ablation, device interrogation showed a stored supraventricular tracing (Fig. 1).
Highlights
Neth Heart J (2016) 24:761–762 going VT results in a refractory AV node hampering the anterograde AV conduction of the induced atrial tachycardia
This resulted in reappearance of the VT with similar CL 400–410 ms, suggesting the presence of concealed ongoing VT in the VT circuit during atrial tachycardia with 1:1 conduction as the VT was not terminated by the overdrive suppression of the atrial tachycardia
This may be explained by an intra-ventricular conduction delay and the long distance from the site of overdrive suppression (His bundle) to the circuit of the VT
Summary
Neth Heart J (2016) 24:761–762 going VT results in a refractory AV node hampering the anterograde AV conduction of the induced atrial tachycardia. Department of Cardiology, OLVG, Amsterdam, The Netherlands
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