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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/19869

Title: Heart rate reduction and exercise performance in recent onset heart failure with reduced ejection fraction: arguments for beta-blocker hypo-response
Authors: Verbrugge, Frederik Hendrik
Vrijsen, Jeroen
Vercammen, Jan
Grieten, Lars
Dupont, Matthias
Mullens, Wilfried
Issue Date: 2015
Citation: ACTA CARDIOLOGICA, 70 (5), p. 565-572
Abstract: Objective Beta blockers reduce all-cause mortality and readmissions in heart failure with reduced ejection fraction (HFrEF), which may be explained by their effect on heart rate (HR). This study assessed the impact of HR reduction with beta blockers on exercise capacity in recent onset HFrEF. Methods and results Fifty consecutive patients with recent onset HFrEF (<30 days) performed a standardized exercise protocol with respiratory gas analysis at baseline as well as after 6 and 12 months. Patients participated in a quality of care programme aiming to achieve guideline-recommended target doses for beta-blocker therapy. At baseline, 6 and 12 months, 36%, 70% and 62% of patients, respectively, had a resting HR <70 bpm. Beta-blocker dose after 12 months was comparable in patients with resting HR < 70 versus >= 70 bpm (P value = 0.631). However, with similar dose uptitration, the former versus the latter had a significantly larger HR reduction (17 +/- 22 versus 4 +/- 15 bpm; P value = 0.027). Peak oxygen consumption (VO2max) was significantly higher when resting HR was <70 versus 70 bpm (17.5 +/- 5.5 versus 14.4 +/- 3.3 mL/min/kg, respectively; P value = 0.038). Similar results were observed after 6 months. Patients in whom resting HR decreased at follow-up compared to baseline had a 2.0 +/- 3.2 mL/min/kg increase in VO2max compared to a 1.2 +/- 7.7 mL/min/kg increase in patients who did not demonstrate a lower resting HR (P value = 0.033). Conclusions In recent onset HFrEF, exercise performance was better when resting HR was controlled <70 bpm with beta-blocker therapy. However, despite aggressive dose uptitration, many patients did not achieve this target as they had little HR reduction with beta-blocker therapy.
Notes: [Verbrugge, Frederik H.; Vrijsen, Jeroen; Vercammen, Jan; Grieten, Lars; Dupont, Matthias; Mullens, Wilfried] Ziekenhuis Oost Limburg, Dept Cardiol, B-3600 Genk, Belgium. [Verbrugge, Frederik H.] Hasselt Univ, Doctoral Sch Med & Life Sci, Diepenbeek, Belgium. [Grieten, Lars; Mullens, Wilfried] Hasselt Univ, Fac Med & Life Sci, Biomed Res Inst, Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/19869
DOI: 10.2143/AC.70.5.3110517
ISI #: 000364106000009
ISSN: 0001-5385
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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