PACEMAKER WITH VASOVAGAL SYNCOPE DETECTION

摘要

Pacemaker with improved detection methods for occurrence of vasovagal syncope episodes. Increased rate pacing followed by fallback to lower rate is a retained feature. The lower rate need not be related to the increased pacing rate. One alternative detects stable or persistent rate below a threshold rate after a rapid rate drop through the threshold rate. Another alternative detects a 'top rate' as a highest persistent rate and compares the difference between it and the rate that follows a rate drop through a 'drop rate' or other threshold level. Yet another alternative finds a persistent rate above a first threshold rate before initiating the rate drop detection function. Once initiated, this embodiment preferably detects a rate drop from above said first threshold to below a second threshold rate, and also preferably detects a stable rate below said second threshold rate. Adaptations to avoiding pacing activation during sleep and combinations of the various embodiments are discussed.