期刊
HEART RHYTHM
卷 10, 期 2, 页码 226-232出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.hrthm.2012.10.035
关键词
Heart failure; Autonomic cardiac control; Holter recording; Heart rate variability; n-3PUFA; Clinical trial
资金
- SocietaProdottiAntibiotici
- Pfizer
- Sigma Tau
- AstraZeneca
BACKGROUND n-3 Polyunsaturated fatty acid (n-3PUFA) supplementation in the Gruppo Italiano per lo Studio della Sopravvivenza nell'Insufficienza Cardiaca (GISSI-HF) study reduced total mortality in patients with heart failure (HF), but the mechanism of action is still debated. The hypothesis of the present GISSI-HF substudy was that n-3PUFA may have beneficial effects on cardiac autonomic control. OBJECTIVE To evaluate the effect of 1 g/day of n-3PUFA vs placebo on heart rate variability variables, deceleration capacity, and turbulence slope. METHODS The GISSI-HF study enrolled patients with HF of any cause and severity. Twenty-four-hour (range 16-24 hours) Holter recordings were performed and analyzed in 388 patients at baseline, 3 months, and 12 months. Base line characteristics were compared by using the chi(2) test, t test, or nonparametric Wilcoxon 2-sample test. Changes over time were tested by using the analysis of covariance adjusted by baseline values. RESULTS At baseline, 36% of the patients were order than 70 years, 82% were men, 92% presented a left ventricular ejection fraction <40%, and 80% were in New York Heart Association class II. An increase in mean RR interval, standard deviation of all normal-to-normal RR intervals, very low frequency power (all P < .05), and turbulence slope (P = .05) was observed after 3 months in the n-3PUFA group compared to the placebo group, independently of the frequency of dietary fish consumption or beta-blocker treatment. These differences between study groups were no longer statistically significant at 12 months. A per-protocol analysis in patients compliant with study treatment showed similar results. CONCLUSIONS n-3PUFA supplementation partially restored autonomic modulation in patients with chronic HF; this effect was maximal after 3 months of treatment.
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