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  • Title: Electrophysiologic drug testing in prophylaxis of sporadic paroxysmal atrial fibrillation: technique, application, and efficacy in severely symptomatic preexcitation patients.
    Author: Bauernfeind RA, Swiryn SP, Strasberg B, Palileo E, Scagliotti D, Rosen KM.
    Journal: Am Heart J; 1982 Jun; 103(6):941-9. PubMed ID: 7081034.
    Abstract:
    Electrophysiologic drug testing was performed in nine patients with severely symptomatic sporadic (2 to 13 [mean 4.2] attacks/24 months) paroxysmal atrial fibrillation (PAF). All patients had control inductions of sustained (greater than 30 seconds) AF by high right atrial stimulation, and attempted inductions following serial administration of drugs. Drugs tested were intravenous procainamide (1.0 to 1.5 gm) (five patients), intravenous propranolol (0.1 mg/kg) (three patients), oral quinidine (1.6 to 2.4 gm/day) six patients), oral disopyramide (1.2 to 1.6 gm/day) (four patients), and oral aprindine (100 to 250 mg/day) (four patients). In all patients, one or more drugs prevented induction of sustained AF: procainamide (one patient), quinidine (five patients), disopyramide (four patients), and aprindine (four patients). All patients were treated with drugs which prevented induction of sustained AF and followed for 8 to 40 (mean 24) months. Seven patients tolerated their drugs: six had no AF and one had several short nonsustained attacks. Two patients did not tolerate their drugs: one had paroxysmal palpitation (on decreased aprindine dosage), and one had AF (while off of aprindine). In conclusion, electrophysiologic drug testing is feasible in patients with sporadic PAF. Inability to induce sustained AF following drug administration suggests successful prophylaxis of spontaneous PAF with the same drug.
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