Patent ID: 7753906

Claim:
A catheter adapted for use at or in a tubular region of the heart, comprising: an elongated catheter body having proximal and distal ends; an expandable and retractable anchoring device adapted to limit rotational and proximal movement of the distal end of the catheter body relative to the tubular region when said anchoring device is radially expanded, wherein the anchoring device is adapted to sit inside the tubular region and to press against an inner circumferential wall of the tubular region when radially expanded; an expandable and retractable stabilizing device proximal of the anchoring device and adapted to limit rotational and distal movement of the distal end of the catheter body relative to the tubular region when said stabilizing device is radially expanded, wherein the stabilizing device is adapted to sit at or near an ostium of the tubular region and to press against the ostium when radially expanded; wherein the anchoring device and the stabilizing device are formed from slits cut in a sheath positioned on at least the distal end of the catheter body and adapted for distal and proximal movement relative to the catheter body to radially expand the devices; and wherein at least one of the anchoring device and stabilizing device is positioned on a telescoping portion distal of the distal end of the catheter body and the telescoping portion is moved proximally to radially expand at least one of the anchoring and stabilizing devices.