title: Impact of body mass index on the development of pocket hematoma: A retrospective study in Chinese people.
abstract: BACKGROUND
  Pocket hematoma is one of the major complications associated with cardiovascular implantable electronic devices (CIEDs) implantation. The aim of this study is to evaluate the impact of body mass index (BMI) on the occurrence of pocket hematoma after CIEDs implantation.
  
  
  METHODS
  The study is a retrospective review of 972 patients receiving CIEDs implantation between 2008 and 2012 in a tertiary hospital.
  
  
  RESULTS
  Twenty two patients (2.2%) developed severe pocket hematoma requiring re-intervention. The hematoma rate (4.6%, n = 15) of patients with a BMI of < 23 kg/m(2) was significantly higher compared with that of patients with a BMI of ≥ 23 kg/m(2) (1.1%, n = 7, P < 0.001). In multivariate regression analysis, a BMI < 23.0 kg/m(2) may be associated with the development of severe pocket hematoma. An increase of 1.0 kg/m(2) in BMI was associated with lower incidence of hematoma formation (OR: 0.84; 95% CI: 0.74-0.95; P = 0.006).
  
  
  CONCLUSIONS
  BMI < 23 kg/m(2) was associated with a higher incidence of pocket hematoma, requiring re-intervention. The data support that great care must be taken when patients were with a lower BMI received CIEDs implantation.
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Guo
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Zhao-Liang
authors.initials: ZL
authors.lastname: Shan
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Hong-Yang
authors.initials: HY
authors.lastname: Guo
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Yuan
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Lin
authors.affiliation: First Department of Cardiology, Nanlou Clinical Division of Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Yue-Xiang
authors.initials: YX
authors.lastname: Zhao
authors.affiliation: Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China ; First Department of Cardiology, Nanlou Clinical Division of Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, China.
authors.forename: Yu-Tang
authors.initials: YT
authors.lastname: Wang
keywords: Body mass index; Complication; Hematoma; Pacemaker