Naslov
Method and apparatus for administering cardiac electrotherapy dependent on mechanical and electrical cardiac activity

Autori
Ferek-Petrić, Božidar

Broj patenta
US 5, 271, 392

Godina
1993

Datum patenta
21.12.1993.

Nositelj prava
Siemens-Elema AB, Zagreb, Hrvatska

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA