A high resting heart rate is associated with an increased risk of ischaemic
heart disease (IHD) and sudden death. This relationship is independent of
known risk factors such as smoking and dyslipidaemia. It therefore appears
sensible to reduce heart rates in IHD patients. Experience in using purl br
adycardiac agents is limited. Other drugs which lower heart rate, such as P
-blockers have been shown to reduce the risks of sudden death and re-infarc
tion, although their use is restricted because of side effects and contra-i
ndications. Heart rate lowering calcium antagonists are also valuable when
used correctly, and not in heart failure. The use of standard and newer hea
rt rate lowering drugs is reviewed.