Multiple monopolar system and method of measuring stroke volume of the heart
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United States of America Patent
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Oct 22, 1991
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N/A
app pub date -
Jul 13, 1990
filing date -
Jul 13, 1990
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Abstract
A multiple monopolar system and method for measuring stroke volume of a patient's heart. An intracardiac impedance catheter is provided with a plurality of monopolar electrodes axially spaced along the surface of its distal end, and is used in conjunction with a distant reference electrode which may, for example, be incorporated into the conductive case of a pacemaker. The proximal end of the catheter is attached to the pacemaker, which, in addition to pulse generator circuitry and circuitry for sensing electrical activity of the heart and for controlling pacing rate, includes a constant-current source for current injection into the volume of blood in the patient's ventricle and an impedance processor for measuring the resultant voltage between one of the monopolar electrodes in the ventricle and the pacemaker case and for calculating stroke volume therefrom. A system and method are also disclosed for generating a three-phase relationship between cardiac output and heart rate for an individual patient at a particular workload, for purposes of determining optimal heart rate, as is a method of using the monopolar electrode configuration to detect ventricular fibrillation.
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- 15 United States
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- PURDUE RESEARCH FOUNDATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Fearnot, Neal E | 3051 Hamilton St., West Lafayette, IN 47907 | 152 | 17308 |
Geddes, Leslie A | 400 N. River Rd., #1724, West Lafayette, IN 47907 | 39 | 9000 |
Wessale, Jerry L | 2268 Federal Pkwy., Lindenhurst, IL 60046 | 2 | 257 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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