Note on drug treatment of complete heart block.

Eightyears ofpersonal experience of long-acting isoprenaline in the treatment of chronic complete heart block is described. In selected patients the long-term results can be very satisfactory and examples are given. The isoprenaline infusion test is invaluable in selecting most patients who will not do well on long-acting isoprenaline. Of those who begin on treatment about half have done well. This form of treatment has proved useful before the setting up of a regional pacemaking service and it continues to be suitable in selected cases. It will continue to have an application in