Patent ID: 7974675

Claim:
A method of measuring pressure comprising: forming a hole in a septal wall in a heart; inserting a lead into the hole in the septal wall to place a sensor through the hole in the septal wall and into a chamber of the heart, the lead having a head portion and a body portion, the head portion having a first body; advancing the head portion of the lead into the chamber to allow expansion of a set of arms, each of the arms having an elongated member extending outwardly from the first body, each of the arms having a first set of protrusions extending outwardly from the elongated member and a second set of protrusions extending outwardly from the elongated member, the first set of protrusions disposed proximal to the second set of protrusions, each of the arms being moveable between a first position adjacent the body portion and a second position with the first set of protrusions adjacent the sensor, the first and second set of protrusions being inwardly arcuate when in the first position to conform with an outer surface of the body portion, the first and second set of protrusions being outwardly arcuate when in the second position, the first set of protrusions adapted to abut a first side of the septal wall when in the second position and the second set of protrusions adapted to abut a second side of the septal wall when in the second position to secure the lead to the septal wall; and retracting the head portion to catch the first set of protrusions on the septal wall and position the septal wall between the first set of protrusions and a second set of protrusions.