Boston Scientific Algorithm

The SmartDelay function aims to allow optimization of the sensed AV delay, the paced AV delay, and the stimulated chamber (LV only or biventricular) based on reference tables stored in the device. This algorithm is based on the respective measurement of the right and left atrioventricular intervals on both spontaneous and paced atrium. The algorithm takes into account any programmed V-V delay. This "optimization" can be performed during a consultation with the programmer (in less than 2 minutes and 30 seconds) but is not automatically or repeatedly performed by the device in an outpatient setting.

Measurement of right and left atrioventricular delays on spontaneous atrium.

Atrial pacing at 80 bpm and measurement of right and left atrioventricular intervals on paced atrium.

Once these measurements have been taken, the algorithm suggests settings for sensed and paced AV delays as well as its choice of stimulated chamber.