Radioactive iodine treatment of intractable angina pectoris.

1311 therapy as to the effect on either mortality rates or the underlying pathologic process, worthwhile results have been cited in approximately 75 per cent of the cases treated. Despite the apparent unanimity of opinion on the efficacy of this form of therapy, there is considerable variation in the reports cited in dosage schedules employed and in the mode of assessment of the results of radioiodine treatment. This lack of uniformity suggested to us that although generally ac cepted, this therapeutic modality might merit periodic re-evaluation. We have, therefore, reviewed our experience with radioactive iodine treatment of angina pectoris over a nine year period with particular regard to: a) 131J dosage sched ules, b) correlation of symptomatic relief of angina with induction of hypo thyroidism, and c) the overall efficacy of this form of therapy.