Pacemaker

Details Pacemaker Pacemaker

1993-09-13

1995-08-15

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 136

Patent

active

054415225

ABSTRACT:
A pacemaker for stimulating both the atrium and the chamber of a heart is able to inhibit the emission of chamber stimulating pulses if a spontaneous chamber reaction is sensed before the expiry of an AV interval, counting from the emission of an atrial stimulating pulse. To prevent the pacemaker from being locked in a position where consecutive chamber stimulating pulses are emitted because of retrograde atrial reactions making the atrium insensitive to atrial stimulating pulses, the AV interval is shortened after the emission of a chamber stimulating pulse. After a predetermined time, a predetermined number of pulses, or when a spontaneous chamber reaction is sensed within the shortened AV interval, the longer AV interval is restored.

REFERENCES:
patent: 4312355 (1982-01-01), Funke
patent: 4421116 (1983-12-01), Markowitz
patent: 5086774 (1992-02-01), Duncan
patent: 5282838 (1994-02-01), Hauser et al.
patent: 5318594 (1994-06-01), Limousin et al.
"Hemodynamic Consequences of Atrioventricular and Ventriculoaxial Pacing", Ogawa et al., PACE, vol. 1, pp. 3-15, 1973.

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