Ela Medical S.a.

Odile Malherbe

Sylvie Girodo

Marcel Limousin

Jean-Luc Bonnet

A cardiac pacemaker that is programmable to have one of a DDD and an AAI pacing mode of operation such that the pacing mode best suited to the patient's physiological condition is selected and implemented. The heart is paced in the AAI mode during periods of atrio-ventricular conduction. It automatically switches to pacing the heart in the DDD mode in response to a lack of atrio-ventricular conduction, and automatically switches back to the AAI mode after occurrence of a restoration event including restoration of atrio-ventricular conduction. Time delays for use in the DDD mode are calculated during operation in the AAI mode prior to loss of atrio-ventricular conduction and other timing delays for monitoring the patient's current physiological condition for mode switching are calculated.

DDD type cardiac pacemaker having automatic operating mode switching

A cardiac pacemaker having a pacing rate responsive to a control function of a physiological parameter indicative of activity levels. The coefficients of the function are automatically calculated and modified in response to the trend of the measured physiological parameter in order to correspond to the patient real needs. For monitoring the physiological parameter minute ventilation (VE), the basic value VE low and maximum value VE max are calculated in order to vary the slope and intercept of the straight line representative of the control relation of the pacing rate FC by the minute volume VE.

Automatic adjustment of the control function for a rate adaptive

A method for calculating the atrial escape interval. A calculation is made of the average value of the delays between two 'P' waves measured over 8 heart cycles, and this average value is taken as the value of the atrial escape interval. The 'P' wave is monitored to identify atrial extrasystole so that only competent 'P' waves are used in determining the average value and, hence, the atrial escape interval.

Method and apparatus for calculating the atrial escape interval for a

A method for controlling the cardiac rhythm of a wearer of a dual-chamber pacemaker. A post-atrial atrial refractory period (PAARP) is defined. Any depolarization of the atrium that occurs during the PAARP is defined as pathological. An atrial-ventricular delay is not triggered in response to a pathological depolarization.

Growing community of inventors

Cachan, France

Odile Malherbe