Systems and methods for internal ecg acquisition

Abstract

A system for obtaining signals related to electrical activity of the heart of a subject includes a sensing device including an elongate member having a distal end configured for placement within a body lumen of a subject, and a proximal end configured to extend from the subject, an actuation portion carried by the elongate member and configured for placement within the body lumen, the actuation portion having a low-profile state for delivery within the body lumen and an expanded state, and one or more sensors disposed on the actuation portion, each including a contact surface configured to contact an interior wall of the body lumen, wherein the actuation portion is configured to cause the contact surface of each of the one or more sensors to contact a location on the interior wall of the body lumen to provide a signal component for producing one or more electrocardiogram signals.

What is claimed is: 
     
         1 . A system for obtaining signals related to electrical activity of the heart of a subject comprising:
 a sensing device comprising:   an elongate member having a proximal end and a distal end, the distal end configured for placement within a body lumen of a subject, the proximal end configured to extend from the subject;   an actuation portion carried by the elongate member and configured for placement within the body lumen of the subject, the actuation portion having a low-profile state for delivery within the body lumen of the subject and an expanded state; and   one or more sensors disposed on the actuation portion, each of the one or more sensors including a contact surface configured to contact an interior wall of the body lumen, wherein the actuation portion is configured to cause the contact surface of each of the one or more sensors to contact a location on the interior wall of the body lumen to provide a signal component for producing one or more electrocardiogram signals.   
     
     
         2 . The system of  claim 1 , wherein the sensing device further comprises one or more conductors, each of the one or more conductors having a distal end and a proximal end, the distal end electrically coupled to at least one of the one or more sensors, and the proximal end to a connector. 
     
     
         3 . The system of  claim 1 , further comprising a processor coupled to the sensing device, the processor configured to modify one or more signals received from the one or more sensors.