title: Yoked catheter positioning in transseptal endocardial left ventricular lead placement.
abstract: BACKGROUND
  Transseptal (TS) endocardial left ventricular (LV) lead placement may be needed for cardiac resynchronization therapy, and often requires crossing a preformed puncture in the interatrial septum (IAS) with a lead delivery catheter inserted from an upper body vein (UBV), which can be difficult or impossible to achieve by manipulation from its hub. Consequently, yoked superior approach TS catheterization was developed.
  
  
  METHODS
  A loop snare housed in a deflectable delivery catheter inserted from an UBV captured the guide wire extending out of a TS sheath inserted from the right femoral vein into the inferior vena cava (IVC). After the IAS had been punctured, the guide wire was left in the left atrium (LA) and the TS sheath withdrawn into the IVC. The delivery catheter was advanced over the snare onto the guide wire, and then pushed by the TS sheath across the IAS puncture into the LA. The snare released the guide wire and was withdrawn. The delivery catheter was manipulated to point toward the LV for lead deployment. If that was not possible, the IAS puncture was dilated with an electrophysiology (EP) catheter housed in a second TS sheath alongside the first one. The EP catheter was captured by the snare and manipulated across the IAS puncture into the LV. The delivery catheter was advanced over the EP catheter directly into the LV.
  
  
  RESULTS
  The technique was tried in four patients with challenging anatomy and allowed successful endocardial LV lead placement in all.
  
  
  CONCLUSIONS
  Yoked catheter positioning facilitates TS endocardial LV lead placement.
authors.affiliation: Department of Cardiology, Royal Victoria Hospital, Belfast, UK. ernest.lau@btinternet.com
authors.forename: Ernest W
authors.initials: EW
authors.lastname: Lau
mesh_terms: D000368:Aged; D006328:Cardiac Catheterization / Q000295:instrumentation*; D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D058409:Cardiac Resynchronization Therapy Devices; D005260:Female; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged