title: Left to right and right to left.
authors: Centro Hospitalar Tondela-Viseu, Viseu, Portugal. Electronic address: anne_delgado@hotmail.com.
authors: Anne
authors: A
authors: Delgado
authors: Centro Hospitalar Lisboa Ocidental-Hospital Santa Cruz, Carnaxide, Portugal.
authors: António
authors: A
authors: Tralhão
authors: Centro Hospitalar Lisboa Ocidental-Hospital Santa Cruz, Carnaxide, Portugal.
authors: Diogo
authors: D
authors: Cavaco
authors: Centro Hospitalar Lisboa Ocidental-Hospital Santa Cruz, Carnaxide, Portugal.
authors: Pedro
authors: P
authors: Adragão
mesh_terms: D017147:Defibrillators, Implantable; D006801:Humans; D008297:Male; D008875:Middle Aged; D019919:Prosthesis Implantation / Q000379:methods*; D014683:Vena Cava, Superior / Q000002:abnormalities