title: [Dual chamber pacing induced heart failure assessed by velocity vector imaging: a case report].
authors.forename: Yin-guang
authors.initials: YG
authors.lastname: Sun
authors.forename: Yi-qiong
authors.initials: YQ
authors.lastname: Xu
authors.forename: Wen
authors.initials: W
authors.lastname: Ruan
mesh_terms: D000368:Aged; D002304:Cardiac Pacing, Artificial / Q000009:adverse effects*; D004452:Echocardiography / Q000379:methods*; D006333:Heart Failure / Q000000981:diagnostic imaging* / Q000209:etiology*; D006801:Humans; D008297:Male