公开(公告)号：EP0757577A1

公开(公告)日：1997-02-12

申请号：EP95913990.0

申请日：1995-03-08

申请人： MEDTRONIC, INC.

发明人： MARKOWITZ, Toby H. ,  HESS, Michael F. ,  SHELTON, Michael Brent ,  RIFF, Kenneth M. ,  JENSEN, Donald Nick

IPC分类号： A61N1

CPC分类号： A61N1/36514 ,  A61N1/365

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.

公开(公告)号：EP0757577B1

公开(公告)日：2004-01-28

申请号：EP95913990.8

申请日：1995-03-08

申请人： MEDTRONIC, INC.

发明人： MARKOWITZ, Toby H. ,  HESS, Michael F. ,  SHELTON, Michael Brent ,  RIFF, Kenneth M. ,  JENSEN, Donald Nick

IPC分类号： A61N1/365

CPC分类号： A61N1/36514 ,  A61N1/365

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.