A survey of the dose of ACE inhibitors prescribed by general physicians for patients with heart failure
R McMullana, B Silkeb
a Department of
Medicine, Belfast City Hospital, Belfast, b Department of Therapeutics and Pharmacology,
Queen's University of Belfast, Belfast
Correspondence to: Dr Ronan McMullan, Kelvin Laboratories, Royal Victoria Hospital, Belfast, UK ronanmcmullan{at}hotmail.com
Submitted 8 November
2000;
Accepted 27 June 2001
AIM
To describe the pattern of
angiotensin converting enzyme (ACE) inhibitor doses prescribed by
general physicians for patients with chronic heart failure and to
review the current evidence favouring the use of higher doses.
DESIGN
A retrospective survey of
the medications of 125 patients with chronic heart failure (in both
inpatient and outpatient settings) was carried out between December
1999 and February 2000.
RESULTS
Altogether 18.4% of
patients surveyed were receiving no ACE inhibitor, the majority of
these (65%) having a contraindication to such an agent. Of those
patients who were prescribed an ACE inhibitor, 65% were receiving a
high dose. The majority of patients who were prescribed a low dose of
ACE inhibitor had no identifiable contraindication to receiving a
higher dose. Of all patients with chronic heart failure studied, 25%
were receiving either no ACE inhibitor or only a low dose in the
absence of contraindication.
CONCLUSION
Since no objectively
measurable variable has been shown to share a clear relationship with
the outcome benefits of ACE inhibitors, no convenient and reliable
assessment exists for determining when an adequate dose has been
reached for each patient. There is an abundance of evidence favouring
high dose ACE inhibitors in heart failure; evidence for the role of low
doses is much less clear. The fact that only half of the patients with
chronic heart failure were found to be receiving a high dose of ACE
inhibitor is probably testimony to inaccurate perceptions and
unreliable assumptions among physicians. It is likely that a change in
current prescribing patterns would benefit patients with chronic heart failure.
Keywords: ACE inhibitors; dosing regimen; heart failure
© 2001 by The Fellowship of Postgraduate Medicine
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