TY - JOUR
T1 - Significance of repeat programmed ventricular stimulation at electrophysiology study for arrhythmia prediction after acute myocardial infarction
AU - Zaman, Sarah
AU - Narayan, Arun
AU - Thiagalingam, Aravinda
AU - Sivagangabalan, Gopal
AU - Thomas, Stuart
AU - Ross, David L.
AU - Kovoor, Pramesh
PY - 2014/7
Y1 - 2014/7
N2 - Background The prognostic significance of a second programmed ventricular stimulation (PVS) at electrophysiology study (EPS), when the first PVS is negative for inducible ventricular tachycardia (VT), in patients following myocardial infarction (MI) is unknown. Methods Consecutive ST-elevation MI patients with left ventricular ejection fraction ≤40% following revascularization underwent early EPS. An implantable cardioverter defibrillator (ICD) was implanted for a positive (inducible monomorphic VT) but not a negative (no arrhythmia or inducible ventricular fibrillation [VF]/flutter) EPS. The combined primary end point of death or arrhythmia (sudden death, resuscitated cardiac arrest, and spontaneous VT/VF) was assessed in EPS-positive patients grouped according to if VT was induced on the first PVS application, or the second PVS application, when the first was negative. Results EPS performed a median 8 days post-MI in 290 patients was negative in 70% (n = 203) and positive in 30% (n = 87). In patients with a positive EPS, VT was induced on the first PVS in 67% (n = 58) and the second PVS, after the first was negative, in 33% (n = 29). Predischarge ICD was implanted in 79 of 87 patients with a positive EPS. Three-year primary end point occurred in 20.9 ± 5.6% and 38.3 ± 9.7% of patients with VT induced by the first and second PVS, respectively (P = 0.042) and in 6.3 ± 1.9% of electrophysiology-negative patients (P < 0.001). Conclusions In patients with post-MI left ventricular dysfunction, VT can be induced in a significant proportion with a second PVS when negative on the first. These patients have a similar higher risk of death or arrhythmia compared to patients with VT induced on the first PVS.
AB - Background The prognostic significance of a second programmed ventricular stimulation (PVS) at electrophysiology study (EPS), when the first PVS is negative for inducible ventricular tachycardia (VT), in patients following myocardial infarction (MI) is unknown. Methods Consecutive ST-elevation MI patients with left ventricular ejection fraction ≤40% following revascularization underwent early EPS. An implantable cardioverter defibrillator (ICD) was implanted for a positive (inducible monomorphic VT) but not a negative (no arrhythmia or inducible ventricular fibrillation [VF]/flutter) EPS. The combined primary end point of death or arrhythmia (sudden death, resuscitated cardiac arrest, and spontaneous VT/VF) was assessed in EPS-positive patients grouped according to if VT was induced on the first PVS application, or the second PVS application, when the first was negative. Results EPS performed a median 8 days post-MI in 290 patients was negative in 70% (n = 203) and positive in 30% (n = 87). In patients with a positive EPS, VT was induced on the first PVS in 67% (n = 58) and the second PVS, after the first was negative, in 33% (n = 29). Predischarge ICD was implanted in 79 of 87 patients with a positive EPS. Three-year primary end point occurred in 20.9 ± 5.6% and 38.3 ± 9.7% of patients with VT induced by the first and second PVS, respectively (P = 0.042) and in 6.3 ± 1.9% of electrophysiology-negative patients (P < 0.001). Conclusions In patients with post-MI left ventricular dysfunction, VT can be induced in a significant proportion with a second PVS when negative on the first. These patients have a similar higher risk of death or arrhythmia compared to patients with VT induced on the first PVS.
KW - arrhythmia
KW - electrophysiology test
KW - implantable cardioverter defibrillator
KW - myocardial infarction
KW - sudden cardiac death
KW - ventricular tachycardia
UR - http://www.scopus.com/inward/record.url?scp=84903983030&partnerID=8YFLogxK
U2 - 10.1111/pace.12391
DO - 10.1111/pace.12391
M3 - Article
C2 - 24666010
AN - SCOPUS:84903983030
VL - 37
SP - 795
EP - 802
JO - Pace-Pacing and Clinical Electrophysiology
JF - Pace-Pacing and Clinical Electrophysiology
SN - 0147-8389
IS - 7
ER -