Patent ID: 6937898

Claim:
An active implantable medical device comprising: means for sensing a cardiac activity including a ventricular rhythm, and means for detecting in sensed activity a disorder of the ventricular rhythm that is distinct from a ventricular fibrillation; means for delivering a biventricular stimulation, connectable to at least two ventricular sites, a right and a left site, wherein said biventricular stimulation means is operated to deliver a biventricular stimulation therapy mode having low energy pulses in response to said detection of the ventricular rhythm disorder distinct from said ventricular fibrillation, for arresting said ventricular rhythm disorder; a threshold associated with a selected ventricular rhythm, wherein said means for sensing a cardiac activity further comprises means for detecting a right ventricular activity; an activity sensor having a first output responsive to an absence of patient activity; and means for resynchronizing the left ventricle stimulation to the detected right ventricular activity, said resynchronization means operating in response to the activity sensor output corresponding to an absence of patient activity and the detected ventricular rhythm being higher than said threshold.