EDITOR,—C M Sudlow and colleagues draw attention to the need for the planned provision of facilities to monitor the increasing number of patients to be treated,1 in line with current recommendations.2 We wish to make several suggestions in the light of a recent audit of a cardiac anticoagulation clinic that we undertook recently.

A random sample of 151 patients (83 female) was given a questionnaire, and the current international normalised ratio was noted in addition. The mean (SD) age was 63.7 (10.7) years …