Pacemaker system with PAC tracking based on QT data

Details Pacemaker system with PAC tracking based on QT data Pacemaker system with PAC tracking based on QT data

1997-03-26

1998-07-21

Getzow, Scott M.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 1362

Patent

active

057828873

ABSTRACT:
A dual chamber pacemaker system and method provide for safe tracking of PACs. The pacemaker obtains an indication of when the T-wave has occurred within the cycle when the PAC occurs, either by measuring the T wave during the cycle, or by getting a QT interval measure from one or more prior cycles. The pacemaker determines a safe V--V interval as the QT interval measure plus a safety factor, the safety factor being selected so as to insure that a pulse that tracks the PAC does not get delivered during the vulnerable period. A PAC is tracked if and only if the VA interval plus the AV delay is as great as the safe V--V interval.

REFERENCES:
patent: 4527568 (1985-07-01), Rickards
patent: 4593695 (1986-06-01), Wittkampf
patent: 4932406 (1990-06-01), Berkovits
patent: 5247930 (1993-09-01), Begemann et al.

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