October 1, 2001Pacing and Clinical Electrophysiology
Morphology Discrimination: A Beat‐to‐Beat Algorithm for the Discrimination of Ventricular from Supraventricular Tachycardia by Implantable Cardioverter Defibrillators
Why the study?
Does a beat-to-beat morphology discrimination algorithm improve the discrimination of ventricular from supraventricular tachycardia in patients with ICDs?
Population
256 patients receiving an implantable cardioverter defibrillator (ICD)
Design
Cohort
Follow-up
126 6-month
Authors
Discussion
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Member takes
Implication
MD algorithms warrant individualized monitor-mode testing before ICD activation; leaves open optimal integration with other discriminators.
Structured PICO
Does a beat-to-beat morphology discrimination algorithm improve the discrimination of ventricular from supraventricular tachycardia in patients with ICDs?
P
Population
256 patients receiving an implantable cardioverter defibrillator (ICD)
I
Intervention
Beat-to-beat algorithm for morphological analysis of the intracardiac electrogram (Morphology Discrimination, MD) alone and in combination with established detection criteria (sudden onset)
O
Outcome
Sensitivity and specificity of the morphology algorithm alone and in combination with established detection criteria for discriminating SVT from VTsurrogate
Morphology discrimination algorithms in ICDs provide limited sensitivity and specificity for distinguishing SVT from VT when used alone, and should be evaluated individually in monitor mode before activation.
Cite This Study
Grünefeld et al. (2001) studied this question.