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Compliance by referring physicians with recommendations on heart failure therapy from a tertiary center
Hans Peter Brunner-La Rocca1, J Capraro, W Kiowsk
1Division of Cardiology, University Hospital, Zurich and Clinic of Cardiology, University Hospital, Basel, Switzerland. brunnerh@uhbs.ch
Insights
Physicians often underdosed heart failure medications like ACE inhibitors/ARBs and beta-blockers, with lower adherence to complex medication changes. Simple, one-step recommendations improved adherence to guideline-directed medical therapy.
Area of Science:
- Cardiology
- Pharmacology
- Internal Medicine
Background:
- General practitioners' adherence to heart failure specialist recommendations was investigated.
- The study assessed medication use and physician compliance with expert guidelines.
Purpose of the Study:
- To evaluate the adherence of referring physicians to heart failure specialist recommendations regarding medication.
- To determine if general practitioners follow expert advice on heart failure pharmacotherapy.
Main Methods:
- A cohort of 193 stable heart failure patients (ejection fraction ≤40%) was analyzed.
- Physician adherence to specialist recommendations on medication (ACE inhibitors/ARBs, beta-blockers, spironolactone) was recorded over 1906 visits.
- Medication doses and changes were compared to target recommendations.
Main Results:
- High initial use of ACE inhibitors/ARBs (96%); beta-blocker and spironolactone use increased post-2001.
- Suboptimal dosing was common for ACE inhibitors/ARBs (55% of target) and beta-blockers (29% of target).
- Physician adherence was lower for initiating/up-titrating ACE inhibitors/ARBs (62%) and beta-blockers (48%) compared to spironolactone (78%).
- Single-step recommendations showed higher adherence (63-70%) than multiple-step recommendations (25-48%).
- No significant difference in adherence was observed between general practitioners and cardiologists.
Conclusions:
- While beneficial heart failure medications were widely prescribed, doses were often below recommended targets.
- Physician adherence to medication change recommendations, especially complex ones, was insufficient.
- Simplified, single-step recommendations and direct prescribing during clinic visits may improve adherence and optimize heart failure management.
Background:
We tested the assumption that general practitioners do not use medication as recommended and do not follow recommendations made by heart failure specialists.
Methods:
The study included 193 stable patients referred to and subsequently seen at our heart failure clinic between 1995 and 2001 with an ejection fraction of 40% or less. They had 1906 visits (1661 with structured follow-up). Recommendations by heart failure specialists regarding medication influencing prognosis and adherence of referring physicians to them were recorded.
Results:
Ninety-six percent of patients were taking angiotensin-converting enzyme (ACE) inhibitor/angiotensin-II receptor blocker (ARB) when referred. The prescription rate of beta-blockers and spironolactone increased after publication of large trials (more than 80% in 2001). Doses were inappropriate for both ACE-inhibitors/ARBs (55% +/- 30% of target dose) and beta-blockers (29% +/- 24%). Recommendations were followed closely for dose reduction/discontinuation of all drugs (82%) and start/uptitration of spironolactone (78%). Adherence was less (P < .01) for start/uptitration of ACE inhibitors/ARBs (62%) and beta-blockers (48%). Recommendations regarding single-step start/uptitration were more successful (ACE-inhibitors/ARBs, 70%; beta-blockers, 63%; single-step of both, 67%) than multiple-step uptitration (ACE inhibitors/ARBs, 48%; beta-blocker, 38%; P < .001). This was particularly true if recommendations concerned multiple-step uptitration of both drugs (25%, P < .001). There was no difference between general practitioners and cardiologists.
Conclusions:
Although penetration of drugs beneficial in heart failure was high upon referral, doses were lower than recommended, and recommendations regarding changes were insufficiently adhered to by the referring physicians. Simple, one-step recommendations were better implemented and may be combined with direct prescriptions during control visits to guarantee adequate medical therapy.
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