RT Journal Article SR Electronic T1 Oral xamoterol in patients with sinoatrial disease. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 469 OP 472 DO 10.1136/hrt.56.5.469 VO 56 IS 5 A1 Tseu, F L A1 Morley, C A A1 Mackintosh, A F YR 1986 UL http://heart.bmj.com/content/56/5/469.abstract AB Twelve patients with sinoatrial disease were assessed while on oral xamoterol (200 mg twice daily) and placebo by a double blind randomised, crossover trial that lasted four weeks. Nine of the patients had been referred for permanent pacing. Xamoterol produced favourable changes in the number of pauses and the mean heart rate in six patients. Another patient deteriorated on xamoterol. Six patients were started on long term xamoterol. Xamoterol produces short term electrocardiographic improvement in some, but not all, patients with symptomatic sinoatrial disease.