Alternans‐Induced ICD Therapy

Barold, S. Serge; M.Sc., Andreas Kucher; McEneaney, David; Stroobandt, Roland X.

doi:10.1111/pace.12564

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2015

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“…A stable pattern of alternating RR intervals is present in Figures , , , and . Consequently, the discrimination algorithms of an ICD may fail if alternans occurs during ventricular or atrial tachycardia . In a single‐chamber ICD with onset and stability discrimination, the alternating intervals during a VT could lead to inappropriate therapy inhibition.…”

Section: Discussionmentioning

confidence: 99%

Alternans of the Ventricular Electrogram in Patients with an Implanted Cardioverter-Defibrillator

Barold

M.Sc.

Meester

et al. 2015

Pacing and Clinical Electrophysiology

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Ventricular alternans may be more common than realized in ICD patients with VT. The correlation of VEGM alternans with the surface electrocardiogram remains unknown. Although QRS alternans itself as an electrical pattern is generally benign, its cause may not be, as illustrated in our patient with CPVT. Furthermore, associated cycle length alternans or undersensing of the smaller alternans component may complicate ICD therapy.

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Section: Discussionmentioning

confidence: 99%