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Beta-blocker therapy for heart failure outside the clinical trial setting: findings of a community-based registry
Joseph A Franciosa1, Barry M Massie, Mary Ann Lukas
1Mount Sinai School of Medicine and Weill Medical College, Cornell University, New York, NY, USA. JosephAFranciosa@aol.com
Insights
Beta-blocker (carvedilol) treatment for heart failure (HF) in the community setting showed outcomes similar to clinical trials. This indicates that HF management guidelines can be successfully applied by primary care physicians and cardiologists.
Area of Science:
- Cardiology
- Pharmacology
- Public Health
Background:
- Beta-blockers are proven to reduce morbidity and mortality in heart failure (HF) clinical trials.
- Evidence for beta-blocker effectiveness in real-world community settings is less understood.
Purpose of the Study:
- To assess the tolerability and outcomes of carvedilol initiation in community-based heart failure patients.
- To compare outcomes between cardiology and primary care physician management.
Main Methods:
- A registry collected data on 4280 heart failure patients initiating carvedilol.
- Follow-up included 1-year assessment of tolerability, dosing, mortality, and HF hospitalizations.
- Patients were managed by either cardiologists (CARD) or primary care physicians (PCP).
Main Results:
- Over 80% of patients experienced minimal difficulty with carvedilol titration.
- Cardiologist-managed patients were more likely to reach target carvedilol doses (49% vs 27%).
- One-year all-cause mortality was 8.5%, with no significant difference between CARD and PCP groups (8.2% vs 9.3%).
- HF hospitalizations decreased from 28% in the prior year to 11% during follow-up.
Conclusions:
- Community-based carvedilol use in heart failure is successful, with outcomes comparable to clinical trials.
- Results suggest that clinical trial findings for carvedilol in HF can be effectively translated to community practice.
- Both cardiologists and primary care physicians can achieve favorable outcomes with carvedilol in heart failure management.
Background:
beta-Blockers reduce morbidity and mortality rates in heart failure (HF) clinical trials, but it is unknown whether these findings persist in the community setting.
Methods:
A registry was created to survey tolerability and outcomes during initiation and 1-year follow-up of beta-blocker treatment with carvedilol in patients with HF treated by cardiologists (CARD) and primary care physicians (PCP) in the community.
Results:
A total 4280 patients were enrolled (3121 by 259 CARD, 1159 by 129 PCP). Patient age averaged 67 +/- 13 years; 35% were women and 12% were black. The left ventricular ejection fraction averaged 31 +/- 12; New York Heart Association class was II-III in 86% and IV in 3%. Patients of PCP had higher left ventricular ejection fraction, were older, and more frequently were female, black, diabetic, hypertensive, and in New York Heart Association class III/IV. Minimal difficulty titrating carvedilol was noted by >80% of CARD and PCP. Significantly more CARD-treated patients reached carvedilol doses of 25 mg twice daily (49% vs 27%). Kaplan-Meier all-cause mortality rate was 8.5% at 1 year and did not differ between CARD-treated and PCP-treated patients (8.2% vs 9.3%, P =.254). At least one HF hospitalization occurred in 11% of patients during follow-up, compared with 28% in the preceding year.
Conclusions:
Community-based physicians use carvedilol with success approaching that of clinical trials. Overall mortality rates and HF hospitalizations were in the same low range as in clinical trials. Thus, it appears that results of clinical trials with carvedilol for HF can be translated to the community setting.
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