Electrocardiographic measurement method for controlling an intra-aortic balloon pump
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United States of America Patent
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-
Mar 7, 1989
Issued Date -
N/A
app pub date -
Mar 30, 1987
filing date -
Mar 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pair of spaced electrodes are disposed inside the thoracic aorta near the heart and are used to sense R- and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position, which is that where R- and P-waves are sensed to have the same magnitude, the P-wave, which occurs earlier than the R-wave, serving as means for accurately predicting the occurrence of the R-wave. The electrodes are affixed to the distal end of an intra-aortic balloon, which is capable of being disposed at the ideal position by monitoring of the R- and P-waves sensed by the electrodes. The balloon is deflated at the occurrence of the R-wave, which has been correctly predicted by the earlier P-wave.
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