Seasonal distribution of pacemaker implantation for symptomatic bradycardia.
Permanent cardiac-pacemaker therapy is widely recognized as beneficial in the treatment of various types of symptomatic bradycardia. However, the seasonal distribution of pacemaker implantation has never been discussed. The purpose of this study was to investigate the seasonal distribution of pacemaker implantation in a large population of patients with symptomatic bradycardia. The study population consisted of 904 patients who underwent implantation of a new permanent pacemaker between January 1999 and December 2001 and were registered in the database of CPI Company in Taiwan. The number of pacemaker implantations in each month was analyzed to investigate the seasonal distribution of pacemaker implantations in a year. The number of patients who underwent pacemaker implantation between October and December was significantly higher than that of other seasons (P < 0.007). The results indicate that there is a tendency for bradyarrhythmic patients to have symptoms between October and December.
Chen
Chien-Jen
CJ
Division of Cardiology, Department of Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China.
Chen
Mien-Cheng
MC
Yip
Hon-Kan
HK
Chang
Hsueh-Wen
HW
Cheng
Cheng-I
CI
Chen
Yen-Hsun
YH
Chai
Han-Tan
HT
Pan
Hsiu-Feng
HF
Hsieh
Chia-Chen
CC
Shih
Shu-Chu
SC
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001919:Bradycardia / Q000453:epidemiology / Q000628:therapy*; D002304:Cardiac Pacing, Artificial / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012042:Registries; D012621:Seasons; D012804:Sick Sinus Syndrome / Q000453:epidemiology / Q000628:therapy; D013624:Taiwan / Q000453:epidemiology