Abstract
The advent of new telemetric capabilities and in particular of stored electrograms (EGMs) has greatly improved the diagnostic specificity of implantable cardioverter defibrillators (ICDs). We report our experience with recent devices having EGMs storage capability implanted in 24 patients in association with a single endocardial lead system. We analysed the EGMs recorded at implant and retrieved from the ICD memory during a mean follow-up of 13.4 months (range 1-33), in order to identify the characteristics helpful in differentiating ventricular from supraventricular tachyarrhythmias (SVT). Atrio-ventricular dissociation (56.5% of cases at implant and 52% at follow-up) and changes in ventricular EGM duration (100%) and morphology (78% of cases at implant and 75% at follow-up) compared with baseline sinus rhythm, were diagnostic clues for ventricular tachycardia. Wide and irregular ventricular EGMs with no recognisable atrial activity were observed during ventricular fibrillation. No changes in ventricular EGM duration and morphology occurred during SVT. We conclude that EGMs recorded from shocking electrodes allow a correct diagnosis of the events precipitating ICD intervention in the vast majority of cases.
| Original language | English |
|---|---|
| Pages (from-to) | 24-29 |
| Number of pages | 6 |
| Journal | European Journal of Cardiac Pacing and Electrophysiology |
| Volume | 8 |
| Issue number | 1 |
| Publication status | Published - 1998 |
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Keywords
- Implantable cardioverter defibrillator
- Stored electrograms
- Ventricular tachyarrhythmias
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
Cite this
Clinical usefulness of stored electrograms in the diagnosis of tachyarrhythmias in patients with implantable cardioverter defibrillators. / Gardini, A.; Benedini, G.; Marchini, A.; Bianchetti, F.; Cumis, A.; Zanelli, E.; Morandi, F.; Visioli, O.
In: European Journal of Cardiac Pacing and Electrophysiology, Vol. 8, No. 1, 1998, p. 24-29.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Clinical usefulness of stored electrograms in the diagnosis of tachyarrhythmias in patients with implantable cardioverter defibrillators
AU - Gardini, A.
AU - Benedini, G.
AU - Marchini, A.
AU - Bianchetti, F.
AU - Cumis, A.
AU - Zanelli, E.
AU - Morandi, F.
AU - Visioli, O.
PY - 1998
Y1 - 1998
N2 - The advent of new telemetric capabilities and in particular of stored electrograms (EGMs) has greatly improved the diagnostic specificity of implantable cardioverter defibrillators (ICDs). We report our experience with recent devices having EGMs storage capability implanted in 24 patients in association with a single endocardial lead system. We analysed the EGMs recorded at implant and retrieved from the ICD memory during a mean follow-up of 13.4 months (range 1-33), in order to identify the characteristics helpful in differentiating ventricular from supraventricular tachyarrhythmias (SVT). Atrio-ventricular dissociation (56.5% of cases at implant and 52% at follow-up) and changes in ventricular EGM duration (100%) and morphology (78% of cases at implant and 75% at follow-up) compared with baseline sinus rhythm, were diagnostic clues for ventricular tachycardia. Wide and irregular ventricular EGMs with no recognisable atrial activity were observed during ventricular fibrillation. No changes in ventricular EGM duration and morphology occurred during SVT. We conclude that EGMs recorded from shocking electrodes allow a correct diagnosis of the events precipitating ICD intervention in the vast majority of cases.
AB - The advent of new telemetric capabilities and in particular of stored electrograms (EGMs) has greatly improved the diagnostic specificity of implantable cardioverter defibrillators (ICDs). We report our experience with recent devices having EGMs storage capability implanted in 24 patients in association with a single endocardial lead system. We analysed the EGMs recorded at implant and retrieved from the ICD memory during a mean follow-up of 13.4 months (range 1-33), in order to identify the characteristics helpful in differentiating ventricular from supraventricular tachyarrhythmias (SVT). Atrio-ventricular dissociation (56.5% of cases at implant and 52% at follow-up) and changes in ventricular EGM duration (100%) and morphology (78% of cases at implant and 75% at follow-up) compared with baseline sinus rhythm, were diagnostic clues for ventricular tachycardia. Wide and irregular ventricular EGMs with no recognisable atrial activity were observed during ventricular fibrillation. No changes in ventricular EGM duration and morphology occurred during SVT. We conclude that EGMs recorded from shocking electrodes allow a correct diagnosis of the events precipitating ICD intervention in the vast majority of cases.
KW - Implantable cardioverter defibrillator
KW - Stored electrograms
KW - Ventricular tachyarrhythmias
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UR - http://www.scopus.com/inward/citedby.url?scp=0031662592&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031662592
VL - 8
SP - 24
EP - 29
JO - European Journal of Cardiac Pacing and Electrophysiology
JF - European Journal of Cardiac Pacing and Electrophysiology
SN - 0939-6780
IS - 1
ER -