Dominant EEG Frequencies Of Patients
Undergoing Dobutamine Stress Test
Author(s)
A. K. Macpherson, S. Neti, M. Averbach, P. A. Macpherson
& C. Chutakositkanon
Abstract
There has been considerable research and speculation that if the brain is under
stress then it could affect the heart and lead to heart disease. The purpose of the
present research was to examine the inverse problem of whether the heart could
potentially cause undesirable reactions in the brain. One method to evaluate for
underlying coronary artery disease is to perform stress testing. Often,
myocardial stress is achieved by the patient walking on a treadmill while being
monitored. In patients who are unable to exercise, pharmacologic stress testing
is performed, either with vasodilatory agents (e.g. adenosine) or dobutamine,
which is a pro-inotropic and chronotropic drug. During dobutamine infusion, the
heart rate increases, but there is a negligible increase in blood pressure. Five
patients who were undergoing dobutamine stress testing were instrumented with
the standard 19 electrode EEG sensors to record brain activity. It was found that
all patients showed resonance in the brain activity at frequencies around 10Hz.
The signal strengths and the electrode locations where a resonance varied
between patients. The one location where all of the patients showed resonance
was at T5-O1; towards the back of the head and for this location, all patients
showed an EEG resonance frequency at approximately 10Hz. Further analysis
of the EEG data is needed to appreciate the consequences of this
neurocardilogical phenomenon.
Keywords: heart, brain, echocardiograms, neurocardiology, electroencephalographs.
Keywords
heart, brain, echocardiograms, neurocardiology, electroencephalographs
Related Book
Other papers in this volume
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