PATIENT MONITORING

HEMODYNAMIC MONITORING DERIVED FROM MAGNETOHYDRODYNAMIC VOLTAGES INDUCED DURING MRI

To develop a technique to non-invasively estimate stroke volume (SV) in real-time during magnetic resonance imaging (MRI) and interventional procedures using
induced magnetohydrodynamic voltages (V MHD ). V MHD overlays occur on electrocardiogram (ECG) recordings during MRI exams, induced due to interactions between aortic blood flow (BF) and the magnetic field of the MRI scanner (B 0 ). As a result, resolved V MHD can potentially be used to provide beat-to-beat SV estimates

BLOOD VOLUME DISTRIBUTIONS IN THE HUMAN BODY DERIVED FROM MAGNETOHYDRODYNAMIC VOLTAGES IN MRI

The magnetohydrodynamic (MHD) effect arises in Magnetic Resonance Imaging (MRI) scanners when rapid ejection of blood from the left ventricle into the aortic arch interacts with the static magnetic field, inducing MHD voltages (V MHD ). This V MHD appears as a voltage overlaid on top of Electrocardiogram (ECG) traces acquired inside the MRI, peaking during cardiac systole. We aim to assess additional vascular (regional) contributions to V MHD induced in ECG recordings

ELECTROCARDIOGRAM

The 12-lead Electrocardiogram (ECG) is a clinical standard for patient physiological monitoring. Obtaining high-fidelity ECGs is essential for patients undergoing cardiovascular interventions, especially heavily sedated, intubated or with ischemic and stroke history. An accurate ECG is also important for MRI scans synchronized with the cardiac cycle’s phases. Acquiring uncorrupted ECG traces inside MRI is challenging due to strong interferences during periods of MRI Gradient Ramps and High-voltage diode-decoupling-voltage transmission to the body coil (GR&RF), and Magneto-Hydro-Dynamic voltages