Active implantable cardiac prosthesis with detection of atrial mechanical activity

摘要

The device has an acceleration sensor outputting an endocardial acceleration signal. A circuitry provides ventricular pacing by varying an atrioventricular delay (AVD) with AVD values. The circuitry derives a value of a parameter representative of a component of the endocardial acceleration signal from an endocardial acceleration signal corresponding to the endocardial acceleration peak associated with an isovolumetric ventricular contraction. The circuitry evaluates a degree of variation of the parameter values as a function of the AVD values to detect atrial and ventricular events. An independent claim is also included for a method for detecting atrial and ventricular events.