Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1994-05-20
1995-08-15
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 6, 128706, A61N 136
Patent
active
054415250
ABSTRACT:
A rate-responsive cardiac pacemaker implements a novel scheme which detects incipient vasovagal syncope (or other episodes caused by a vasodepressive or cardioinhibitory disorder) when a) the heart rate drops below a programmable minimum size, and b) the rate after said drop is below a programmable maximum drop ending rate. The pacemaker implements a stability and intervention procedure upon the detection of an episode, in which it ignores transient drops in rate, and paces at a predetermined high rate if the drops are stable. The pacemaker then gradually reduces the pacing rate over a predetermined time to the pre-episodic level. A sleep disable feature disables the vasovagal syncope detection and therapy features during the patient's sleeping hours to reduce or eliminate false positive responses.
REFERENCES:
patent: 4556063 (1985-12-01), Thompson
patent: 4880005 (1989-11-01), Pless
patent: 5127404 (1992-07-01), Wyborny
Hess Michael F.
Riff Kenneth M.
Shelton Michael B.
Getzow Scott M.
Kamm William E.
Medtronic Inc.
Patton Harold R.
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