From the Literature

•.\n evaluation of D. C. Shock treatment of atrial arrhythmia is given hv C. Bjcrkclunrl and O. M. Orning (A eta med, Scand., 1968, 184, 481) hascd on an experience of 437 patients. RO':', reverted to sinus rhythm during the first attempt. Aftr 24 months 23' of 290 patients first treated were in sinus rhvthrn. The sinus rhvthm was most' stahle in operated m ilral stenosis, atrial septal defect and treated thyrotoxicosis. The authors were nnahle to give simple criteria for selection of patients who would bcncflt from reversion and rhcv stress that a careful evaluation is required for each patient.