Method and apparatus for impedance based automatic pulse duratio

Details Method and apparatus for impedance based automatic pulse duratio Method and apparatus for impedance based automatic pulse duratio

1991-08-16

1993-07-27

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

052303365

ABSTRACT:
An antitachycardia device, either implanted or external, which delivers a fixed pulse width truncated exponential waveform defibrillation shock and automatically adjusts the pulse duration based upon the impedance measured or calculated following a delivered shock. The apparatus operates by measuring or calculating the high voltage system impedance, selecting a pulse width for that impedance value and using a pulse width derived from the selected pulse width for the next defibrillation shock.

REFERENCES:
patent: 3706313 (1972-12-01), Milani et al.
patent: 4574810 (1986-03-01), Lerman
"Transthoracic Ventricular Defibrillation in the 100 kg Calf with Symmetrical One-Cycle Bidirectional Rectangular Wave Stimuli" (Schuder, et al) IEEE Transactions on Biomedical Engineering, vol. BME-30, No. 7, Jul. 1983.

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