Method and apparatus for determining the origins of cardiac arrh

Details Method and apparatus for determining the origins of cardiac arrh Method and apparatus for determining the origins of cardiac arrh

1995-09-25

1997-07-08

Kamm, William E.

Surgery

Truss

Pad

A61B 504

Patent

active

056450702

ABSTRACT:
A method of discriminating among cardiac rhythms of supraventricular and ventricular origin by exploiting the differences in their underlying dynamics reflected in the morphology of the waveform. A phase space representation of the dynamics of a waveform is obtained from the electrogram signal amplitude by using the technique of delay embedding. A first cardiac rhythm electrogram of known origin is sensed and a phase space representation or trajectory is generated for use as a template. A second or test cardiac rhythm electrogram is sensed and a phase space representation is generated from the detected waveform complex. This second phase space representation is compared to the template to distinguish between the origins of the first and second cardiac rhythms. If a test trajectory is sufficiently different from the template trajectory, the test complex is deemed to have different dynamics, and therefore be from a different origin than the template.

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