Patent ID: 8112149

Claim:
A method for determining physiological status of a patient, said method comprising: attaching leads to a heart of the patient, wherein one of the leads contacts a right ventricular septum of the heart of the patient; detecting the activity level of the patient using one or more piezoelectric accelerometers to determine whether the patient is asleep; recording a separate intramyocardial electrogram for each of a right ventricle and a left ventricle of the heart of the patient using the leads in response to signals from the one or more piezoelectric accelerometers when the patient is asleep; measuring the amplitude and change in voltage over time of the intramyocardial electrograms; stopping the measuring when the patient is not in alpha sleep; averaging the amplitude and change in voltage over time measurements for the right ventricle and left ventricle; and transmitting the averaged measurements to a receiver for communication to an intended recipient.