Influence of pacing rate in right ventricle on quality of life and heart function in patients with atrial fibrillation

Abstract

Objective To explore the influence of different pacing rate in risht ventricle on quality of life.Methods Pacing rate was based on the average heart rate(AHR)obtained before implanting pacemaker.Minnestota living with heart failure questionnaire(MLHFQ)and 6 minutes walk test(6MWT)were performed before implanting pacemaker and afer pacing by(AHR-10)bpm,(AHR-5)bpm,(AHR)bpm,(AHR+5)bpm,(AHR+10)bpm respectively one month.Results The total score of MLHFQ,the Score of physical dimentions,the score of emotion dimensions was lower than pacing with rate of(AHR-10)bpm,(AHR-5)bpm,(AHR)bpm,(AHR+10)bpm(36.0±14.59 vs 42.0±15.48,41.1±14.69,38.3±14.48,39.1±14.75,22.5±6.22 VS 26.8±7.24,26.2±6.31,25.3±5.20,25.7±7.15,13.0±3.62 VS 17.6±4.35,16.8±5.16,16.1±4.19,15.2±4.17,P＜0.05,respectively),the distance of6 minutes walk test(6MWT)was higher than pacing with rate of (AHR-10)bpm,(AHR-5)bpm,(AHR)bpm,(AHR+10)bpm[(454.1±43.45)m VS(420.2±46.05)m,(428.3±44.67)m,(428.3±44.67)m,(434.7±42.87)m,(429.5±44.51)m,P＜0.05,respectively]at the pacing rate of(AHR+5)bpm.Conclusion Patients with atrial fibrillation after VVI pacing not only have a better quality of life but also have a better heart function at the pacing rate of(AHR+5)bpm. Key words: Atrial fibrillation; Pacing rate; Quality of life; 6 minutes walk test