System and method for hemodynamic pacing in ventricular tachycar

Details System and method for hemodynamic pacing in ventricular tachycar System and method for hemodynamic pacing in ventricular tachycar

1995-10-26

1998-04-21

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 9, 607 13, A61N 1365, A61N 137

Patent

active

057413100

ABSTRACT:
A system and method for providing a 1:2 pacing therapy in response to a sensed ventricular tachycardia, which results in an improved hemodynamic response while limiting the potential for interrupting the tachycardia in a way that can cause a more dangerous tachycardia, or even VF. The pacing therapy involves obtaining a measure of the time interval between ventricular beats, and using this information to time out and deliver alternate stimulus pulses which occur just a short time interval (.DELTA.) before the next expected natural ventricular beat. By delivering the alternate cycle stimulus at a predetermined time interval before the expected ventricular beat, the advantage of increased arterial pressure on alternate spontaneous beats is obtained, while avoiding the danger of evoking a more dangerous arrhythmia. The system further monitors change in rate while therapy is being applied, and either adjusts the timing or exits the routine whenever significant rate change is detected.

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Technical Note: "A Triggered Generator For the Electrical Treatment of Tachycardias," Med. & Biol. Eng., 10, pp. 297-300, Pergamon, 1972.

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