Patent ID: 8876727
Filing Date: 2014-11-04
Classification: A61B,A61N

Abstract:
1. A method of detecting phrenic nerve stimulation in a patient comprising: detecting an activation event; obtaining a heart sound signal of a patient from an implanted heart sound sensor; determining that an electrical stimulation has been applied to the patient; in response to detecting the activation event, monitoring a portion of the heart sound signal, the portion defined by a predetermined window after the application of the electrical stimulation; determining whether phrenic nerve stimulation occurred based on the portion of the heart sound signal; determining that the phrenic nerve has been stimulated; and in response to the determination that the phrenic nerve has been stimulated: changing an atrioventricular delay of cardiac pacing; and confirming the determination that the phrenic nerve has been stimulated by at least monitoring another portion of the heart sound signal, the portion defined by another predetermined window after the application of the cardiac pacing at the changed atrioventricular delay.