The present invention provides a method and apparatus for detecting and monitoring obstructive sleep apnea. The apparatus includes an intracardiac impedance sensor to measure intracardiac impedance, a movement sensor to measure an amount of movement of a patient, and a controller operatively coupled...http://www.google.ca/patents/US20030204213?utm_source=gb-gplus-sharePatent US20030204213 - Method and apparatus to detect and monitor the frequency of obstructive sleep apnea
