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Impedance Spectroscopy: a Method for Surveillance of Ischemia Tolerance of the Heart

DOI

54

Citations

0

References

1987

Year

M. Gebbard, E. Gersing, C. Brockhoff, Ph. A. Schnabel, H. J. Bretschneider
The Thoracic and Cardiovascular Surgeon

Abstract

phi (5 kHz) displays very similar characteristics during the ischemic period to those of the real part of the impedance at 200 Hz, Re (200 Hz). Re (200 Hz) increases, when--according to electron microscopic findings--an intracellular myocardial edema begins to develop. The changes of Re(200 Hz) are always smaller, however, than those of phi (5 kHz). This indicates that phi (5 kHz) increases in the course of ischemia not only as a consequence of confinement of the extracellular space by myocardial cellular edema but also because of changes of passive electrical characteristics of the myocardial cell membranes.(ABSTRACT TRUNCATED AT 250 WORDS)