title: Pilsicainide-induced ST segment elevation and ST segment depression in two patients with variant forms of Brugada-type electrocardiographic abnormalities.
abstract: In two patients with variant forms of Brugada electrocardiographic abnormalities, ST segment elevation, and reciprocal ST segment depression developed during intravenous administration of pilsicainide. In one patient, pilsicainide accentuated the ST segment elevation in leads I, aV(L), and V(1)-V(3) and caused ST segment depression in leads II, III, and aV(F). Coronary angiograms at the time of ST segment elevation were normal. In the other patient, pilsicainide accentuated the coved-type ST segment elevation in leads II, III, and aV(F) and caused ST segment depression in leads I, aV(L), and V(2)-V(5). Frequent premature ventricular complexes (PVCs) with two different left bundle branch block patterns developed during ST segment elevation. Intravenous isoproterenol returned the ST segment to baseline in both patients and suppressed the PVCs in the second patient. We hypothesize that a wide area of epicardial myocardium with large I(to) current might explain the reciprocal ST segment depression observed at the time of accentuated ST segment elevation.
authors: School of Health Science, Niigata University School of Medicine, Niigata, Japan. masaomi@clg.niigata-u.ac.jp
authors: Masaomi
authors: M
authors: Chinushi
authors: Minoru
authors: M
authors: Tagawa
authors: Daisuke
authors: D
authors: Izumi
authors: Hiroshi
authors: H
authors: Furushima
authors: Yoshifusa
authors: Y
authors: Aizawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000008:administration & dosage / Q000009:adverse effects*; D053840:Brugada Syndrome / Q000150:complications* / Q000188:drug therapy*; D004562:Electrocardiography / Q000187:drug effects*; D006801:Humans; D007275:Injections, Intravenous; D008012:Lidocaine / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives*; D008297:Male; D018879:Ventricular Premature Complexes / Q000139:chemically induced* / Q000175:diagnosis*
chemical_list: D000889:Anti-Arrhythmia Agents; D008012:Lidocaine; C042288:pilsicainide