Method and apparatus for controlling a double atrial triple cham

Details Method and apparatus for controlling a double atrial triple cham Method and apparatus for controlling a double atrial triple cham

1995-04-04

1996-12-17

Lateef, Marvin M.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 4, 607 14, 607 15, A61N 1368

Patent

active

055848672

ABSTRACT:
Control of a double atrial triple chamber cardiac pacemaker having a programmable fallback mode. The triple chamber pacemaker has a right atrial electrode and a left atrial electrode connected to the same atrial detection/stimulation circuit, as well as a ventricular electrode connected to a ventricular detection/stimulation circuit of the pacemaker. The fallback mode involves desynchronization of the ventricular stimulation from the detected atrial rhythm when the atrial rhythm is too rapid. The pacemaker also includes a fallup mode of pacing in which there is a progressive re-synchronization of ventricular stimulation to the atrial rhythm when the atrial rhythm falls to a less rapid rhythm. The triple chamber pacemaker senses a succession of signals at the atrial circuit, and in response to each detection of a signal, defines a masking period of inter-atrial propagation for not sensing signals at the atrial circuit, measures an interval of time separating two successive sensed signals, compares the measured time interval to a predetermined control value, and triggers the fallup mode of progressive re-synchronization when the measured time interval becomes greater than the control value.

REFERENCES:
patent: 4932406 (1990-06-01), Berkovits
patent: 5107850 (1992-04-01), Olive
patent: 5226415 (1993-07-01), Girodo et al.

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