Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1992-01-27
1993-12-21
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 1362
Patent
active
052713920
ABSTRACT:
A method for administering cardiac electrotherapy and an implantable electrotherapy apparatus employ myocardial tensiometry to measure contractions of the heart muscle. The system includes a tensiometric element disposed at a location subject to bending due to cardiac contractions, the tensiometric element consisting either of piezoelectric material or variable resistivity material, the mechanical stresses to which the tensiometric element is subjected causing the element to produce a voltage or a resistivity variation comparable in frequency and amplitude to the contractions. The tensiometric element may be in the form of a strip disposed on a surface of a patch electrode, of the type suitable for use in an implantable defibrillator, or may be a strip or a tube located at the bend of a J-shaped pacing lead, of the type implantable in the atrium or in the ventricle in a cardiac pacemaker system. Electrical cardiac activity due to repolarization of the cardiac tissue is also sensed, and the frequency of the electrical activity, the frequency of the mechanical activity due to the cardiac contractions, and the amplitude of the voltage signal produced by the tensiometric element are used to control the administration of electrotherapy to the cardiac tissue.
REFERENCES:
patent: 3815611 (1974-06-01), Denniston, III
patent: 3905356 (1975-09-01), Fletcher et al.
patent: 3942534 (1976-03-01), Allen et al.
patent: 4114628 (1978-09-01), Rizk
patent: 4291707 (1981-09-01), Heilman et al.
patent: 4475551 (1984-10-01), Langer et al.
patent: 4535774 (1985-08-01), Olson
patent: 4572191 (1986-02-01), Mirowski et al.
patent: 4600017 (1986-07-01), Schroeppel
patent: 4614192 (1986-09-01), Imran et al.
patent: 4662377 (1987-05-01), Heilman et al.
patent: 4686987 (1987-08-01), Salo et al.
patent: 4690143 (1987-09-01), Schroeppel
patent: 4763646 (1988-08-01), Lekholm
patent: 4766902 (1988-08-01), Schroeppel
patent: 4768511 (1988-09-01), DeCote, Jr.
patent: 4768512 (1988-09-01), Imran
patent: 4770177 (1988-09-01), Schroeppel
patent: 4773401 (1988-09-01), Citak et al.
patent: 4774950 (1988-10-01), Cohen
patent: 4779617 (1988-10-01), Whigham
patent: 4784151 (1988-11-01), Frank et al.
patent: 4790317 (1988-12-01), Davies
patent: 4791931 (1988-12-01), Slate
patent: 4798206 (1989-01-01), Maddison et al.
patent: 4856523 (1989-08-01), Sholder et al.
patent: 4895151 (1990-01-01), Grevis et al.
patent: 5097830 (1992-03-01), Eikefjord et al.
patent: 5109842 (1992-05-01), Adinolfi
"Transducer for Cardiovascular Research," Feldstein et al., Mechanical Engineering, Apr. 1976, p. 57.
"Transducers for Heart Research," Feldstein et al., NTIS Tech Notes, May 1985, p. 519.
Kamm William E.
Siemens-Elema AB
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