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  • Title: Programmed ventricular stimulation in predicting vulnerability to ventricular arrhythmias and their response to antiarrhythmic therapy.
    Author: Mason JW, Swerdlow CD, Winkle RA, Griffin JC, Ross DL, Keefe DL, Clusin WT.
    Journal: Am Heart J; 1982 Apr; 103(4 Pt 2):633-9. PubMed ID: 7064805.
    Abstract:
    In predicting vulnerability to ventricular arrhythmias and their response to antiarrhythmic therapy, several factors and questions need to be considered, including the following. (1) Ventricular tachycardia (VT) can be induced in most patients who have recurrent sustained VT. (2) Because induced VT can often be pace terminated, termination by pacing should be attempted before cardioversion is applied. (3) Acutely effective antiarrhythmic agents are no longer being found for the majority of patients undergoing electrophysiologic-pharmacologic study in our series. (4) Specific VT-induction programs affect both the inducibility of VT and acute efficacy of drugs at electrophysiologic study; this point requires examination. (5) Arrhythmia-induction studies may not product high yield in patients with clinical ventricular fibrillation or unsustained VT. (6) It is as yet unclear whether some drugs, such as amiodarone, can be accurately evaluated by using arrhythmia-induction techniques. (7) Induction of the repetitive ventricular response by V2 stimulation is not a useful method for antiarrhythmic drug selection in patients with recurrent ventricular tachyarrhythmias. (8) Adequate data do not yet exist to identify either the ECG-monitoring technique or the arrhythmia-induction technique as the preferred method for selecting antiarrhythmic drugs for chronic therapy of patients with recurrent ventricular tachyarrhythmias. A study to compare the accuracies of the two techniques is both feasible and needed.
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