Patent ID: 8195293

Claim:
An active implantable medical device for pacing, resynchronization, cardioversion and/or defibrillation of the heart, comprising: a means for sensing a patient's heart rhythm, comprising a sensing circuit, the sensing circuit collecting signals that are representative of cardiac depolarizations from at least one endocardial electrode adapted to be implanted in the myocardium of the patient; means for detecting myocardium contractions of the patient's heart, comprising an endocardial acceleration sensor and means for determining at least one endocardial acceleration peak over one given cardiac cycle, wherein the endocardial acceleration sensor senses signals that are representative of endocardial acceleration peaks (PEA); means for searching for ventricular noise artifacts, comprising means for performing correlation analysis between said signals representative of the cardiac depolarizations and said signals representative of the endocardial acceleration peaks, and means for delivering, in the case of a lack of correlation, a signal of ventricular noise suspicion, means for detecting a level of noise signals in the signals representative of cardiac depolarizations, and a means for modifying an operating parameter of said means for sensing the patient's heart rhythm as a function of said level of noise signals.