Influence of dual-chamber pacemaker on heart function in patients with bradyarrhythmia / 心血管康复医学杂志

ABSTRACT

Objective:To observe the therapeutic effect of dual-chamber pacemaker on bradyarrhythmia and analyze its influence on heart function.Methods:A total of 86 patients with bradyarrhythmia undergoing dual-chamber pacemaker implantation were enrolled and followed up for six months.Their clinical symptom scores (evaluated ac-cording Karolinska questionnaire),heart function and improvement of quality of life (QOL)were observed.Re-sultsCompared with before pacemaker implantation,there were significant rise in clinic symptom scores of short breath and acratia [(7.20±5.50)scores vs.(15.00±4.30)scores],dizziness [(3.45±2.20)scores vs.(7.80± 1.40)scores],palpitation [(4.43±1.80)scores vs.(11.00±1.00)scores]and chest pain [(13.25±4.00)scores vs.(20.00±3.00)scores]etc.after implantation of dual-chamber pacemaker,P<0.05 all;there were significant improvements in heart function indexes [cardiac output(4.12±1.00)L/min vs.(6.90±3.00)L/min,left ven-tricular ejection fraction(29.80±4.00)% vs.(38.00±3.00)%,cardiac index(3.20±0.81)L·min-1 ·m-1 vs.(4.31±0.45)L·min-1 ·m-1 ,P<0.01 all],and significant increase in each score and total score of QOL [(12.50±1.00)scores vs.(20.50±2.20)scores]on the third month,and continued until 6 month after implanta-tion (P<0.01 all)in patients with bradyarrhythmia.Conclusion:Dual-chamber pacemaker can significantly im-prove heart function and quality of life in patients with bradyarrhythmia and should be extended in clinic.