Quinidine Therapy after Mitral Valvotomy

Direct current conversion of atrial fibrillation.

“…However, all 13 patients in his study who did not convert had longstanding atrial fibrillation, a factor that affects the conversion rate, and no attempt was made to separate the effects of these two factors. Aber's (1962) observations were confirmed by Oram and Davies (1964). The writerwas able to showthat the size of F waves did significantly affect the success of conversion and that this correlation was independent of other influences.…”

“…in 68 per cent of 96 patients with rheumatic heart disease. Aber (1962) examined the relation between the size of F waves and the success of quinidine conversion and found that it was more difficult to convert patients whose F waves were of small amplitude. However, all 13 patients in his study who did not convert had longstanding atrial fibrillation, a factor that affects the conversion rate, and no attempt was made to separate the effects of these two factors.…”

Appraisal of electroconversion in treatment of cardiac dysrhythmias.

“…8), were found to lessen the chances of success (patients with "lone" atrial fibrillation excepted). The presence of coarse "f" waves in lead CR1 was found by Aber (1962) to be a good prognostic sign for the ease of conversion of atrial fibrillation to sinus rhythm by quinidine. Oram and Davies (1964) who analysed the height of "f" waves in lead VI found no correlation at the 5 per cent level between higher fibrillation waves and the ease of conversion by direct-current shock.…”