Simultaneous acquisition of functional magnetic resonance images and impedance cardiography
| Autor: | Scott T. Grafton, Jim Blascovich, William S. Ryan, Marlo Verket, Robert M. Kelsey, Matthew Cieslak, Jessica E. Cornick, Alan Macy |
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| Rok vydání: | 2014 |
| Předmět: |
Cardiac output
medicine.diagnostic_test Endocrine and Autonomic Systems Cognitive Neuroscience General Neuroscience Ensemble averaging Left Ventricular Ejection Time Experimental and Cognitive Psychology Stroke volume Functional magnetic resonance images Impedance cardiography Neuropsychology and Physiological Psychology Developmental Neuroscience Neurology medicine cardiovascular diseases Psychology Electrical impedance Electrocardiography Biological Psychiatry Biomedical engineering |
| Zdroj: | Psychophysiology. 52:481-488 |
| ISSN: | 0048-5772 |
| DOI: | 10.1111/psyp.12385 |
| Popis: | While simultaneous acquisition of electrocardiography (ECG) data during MRI is a widely used clinical technique, the effects of the MRI environment on impedance cardiography (ICG) data have not been characterized. We collected echo planar MRI scans while simultaneously recording ECG and thoracic impedance using carbon fiber electrodes and customized amplifiers. Here, we show that the key changes in impedance (dZ/dt) and features of the ECG waveforms are not obstructed during MRI. We present a method for ensemble averaging ICG/ECG signals collected during MRI and show that it performs comparably with signals collected outside the MRI environment. These results indicate that ICG can be used during MRI to measure stroke volume, cardiac output, preejection period, and left ventricular ejection time. |
| Databáze: | OpenAIRE |
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