Method and apparatus for mapping a chamber of a heart

摘要

A method for intracardially mapping a condition such as an electrical or mechanical property of a chamber of a heart with a catheter (21) having a distal tip (22) and at least one condition sensor (28) contained therein or proximate thereto. The at least one sensor is capable of sensing condition information in the chamber and provides the three-dimensional position of the catheter tip in a positional frame of reference. The method comprises the steps of acquiring first and second images of the chamber. The images are acquired from different projections and contain topological information of the chamber. The chamber images are registered with the positional frame of reference. The catheter distal tip is advanced into the catheter and is navigated to acquisition points under the guidance of topological information contained in or derived from the images. Condition and position information are acquired at each of the acquisition points, the points being sufficient in number and spacing to permit the generation of a map of the condition in the chamber. The topological information used to guide the navigation of the catheter is preferably a three dimensional reconstruction of the chamber derived from topological information contained in the images.