Case 112

Paul A. Friedman; Charles D. Swerdlow

doi:10.1007/978-1-84996-390-9_112

Case 112

Paul A. Friedman, Charles D. Swerdlow

Cardiovascular Medicine

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

A 57-year-old woman with ischemic cardiomyopathy and a dual-chamber St. Jude Atlas II DR V-265 ICD presented with inappropriate shocks for sinus tachycardia detected as VT (Fig. 112.1, upper panel). The ventricular electrogram morphology discriminator (MD™)^1,2 was programmed ON. This discriminator diagnoses SVT and withholds VT therapy if five of eight ventricular electrograms in a sliding window have a match score of or higher 60% with the template electrogram. The stored electrogram is shown in Fig. 112.1. The real-time electrogram in sinus rhythm, shown in the lower left panel shows a morphology match score of 100% on sinus beats. The lower right panel shows a real-time electrogram recorded during rapid atrial pacing.

Original language	English (US)
Title of host publication	Cardiac Electrophysiology
Subtitle of host publication	Clinical Case Review
Publisher	Springer London
Pages	441-442
Number of pages	2
ISBN (Print)	9781849963893
DOIs	https://doi.org/10.1007/978-1-84996-390-9_112
State	Published - Dec 1 2011

ASJC Scopus subject areas

Medicine(all)

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10.1007/978-1-84996-390-9_112

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AB - A 57-year-old woman with ischemic cardiomyopathy and a dual-chamber St. Jude Atlas II DR V-265 ICD presented with inappropriate shocks for sinus tachycardia detected as VT (Fig. 112.1, upper panel). The ventricular electrogram morphology discriminator (MD™)1,2 was programmed ON. This discriminator diagnoses SVT and withholds VT therapy if five of eight ventricular electrograms in a sliding window have a match score of or higher 60% with the template electrogram. The stored electrogram is shown in Fig. 112.1. The real-time electrogram in sinus rhythm, shown in the lower left panel shows a morphology match score of 100% on sinus beats. The lower right panel shows a real-time electrogram recorded during rapid atrial pacing.

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Case 112

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