A trans-septal guide catheter for providing access through the septum separating a first heart chamber from a second heart chamber that includes an elongated guide catheter body extending between guide catheter proximal and distal ends. A distal segment of the guide catheter is adapted to be inserted...http://www.google.ca/patents/US8096959?utm_source=gb-gplus-sharePatent US8096959 - Trans-septal catheter with retention mechanism
