ACC/AHA/ESC Guidelines for the Management of Patients With Supraventricular Arrhythmias—Executive SummaryFIGURES 1–13. Japanese Montandoniola species. 1–4, M. thripodes, male (1, 2) and female (3, 4); 5, 6, M. pictipennis, male; 7–13, M. kerzhneri sp. nov., female, holotype. 1–8, Habitus, dorsal (1, 3, 5, 7) and lateral (2, 4, 6, 8) views; 9, 10, head and pronotum, dorsal (9) and lateral (10) views; 11, ostiolar peritreme and evaporative area of left metapleura, lateroventral view; 12, left fore leg, outer view; 13, left mid leg, dorsal view. Scale bars: 1.0 mm for 1–8; 0.2 mm for 9, 10, 12, 13; 0.1 mm for 11.
Catheter-Induced Ablation of the Atrioventricular Junction to Control Refractory Supraventricular ArrhythmiasFive patients with recurrent bouts of supraventricular tachycardia proved resistant or became intolerant of both conventional and experimental drugs. These patients were subjected to a new procedure involving delivery of DC shocks to an electrode catheter positioned adjacent to the His bundle. Complete atrioventricular (AV) block was produced in all, one patient died suddenly six weeks after shock therapy, and the remainder had complete AV block with follow-up intervals ranging from four to 12 months. Shock therapy was associated with mild elevations of creatine phosphokinase MB (31 +/- 18 units), but there was no hemodynamic evidence of tricuspid insufficiency. If this new technique proves safe and effective, it should supplant the need for open heart surgical procedures for His-bundle ablation.