Results and efficiency of programmed ventricular stimulation with four extrastimuli compared with one, two, and three extrastimuli.

Abstract

A stimulation protocol that exclusively uses four extrastimuli improves the specificity and efficiency of programmed ventricular stimulation without compromising the yield of monomorphic ventricular tachycardia in patients with coronary artery disease.

Predictive Value of Ventricular Arrhythmia Inducibility for Subsequent Ventricular Tachycardia or Ventricular Fibrillation in Multicenter Automatic Defibrillator Implantation Trial (MADIT) II Patients

“…Third, the findings concerning the predictive value of the EP test for VT or VF are specific to the EP testing protocol used. Protocols using more than three extrastimuli, which may induce VT in a greater proportion of patients (35)(36)(37) or other variations could possibly have led to different findings. As noted previously, the MUSTT study, the largest other study prospectively after patients with remote MI, used a virtually identical protocol to the MADIT II study protocol.…”

Effect of Epicardial Fat on Electroanatomical Mapping and Epicardial Catheter Ablation

“…Two multielectrode catheters were positioned in the His bundle position and the right ventricular apex. In the patients with structural heart disease, programmed ventricular stimulation at 2 right ventricular sites was performed using up to 4 extrastimuli before and after the ablation procedure to assess for inducible VTs (3). Pericardial access was obtained as described by Sosa et al (4) Thereafter, 3,000 U of heparin were administered followed by an additional 1,000 U/h; if left ventricular endocardial mapping was performed, a bolus of 5,000 U of heparin was administered, with additional heparin as needed to maintain an activated clotting time Ͼ250 s. Mapping and ablation procedure.…”

Effect of ablation of frequent premature ventricular complexes on left ventricular function in patients with nonischemic cardiomyopathy

“…Programmed stimulation with up to 4 extrastimuli was performed with and without isoproterenol. 8 If sustained ventricular tachycardia (VT) was induced, an ICD was implanted after the ablation procedure before the patient was discharged from the hospital. VTs were targeted for ablation if they remained inducible after ablation of the predominant PVCs.…”