Cardiac catheterization is carried out by constructing a left atrial model ofa heart of a livingsubject, selecting a global catheter that is dimensioned to conform to theleft atrial model, representingthe catheter in the left atrial model； extending the length axis of thecatheter in the leftatrial model to form an intersection with the foramen ovale, and reporting theintersection as arecommended site of transseptal puncture for insertion of the cathetertherethrough.
