Johan Heiberg1, Benjamin Asschenfeldt2, Marie Maagaard2, Steffen Ringgaard3. 1. Dept. of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Denmark; Dept. of Clinical Medicine, Aarhus University Hospital, Denmark. Electronic address: johan.heiberg@clin.au.dk. 2. Dept. of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Denmark; Dept. of Clinical Medicine, Aarhus University Hospital, Denmark. 3. MR Research Center, Aarhus University Hospital, Denmark; Dept. of Clinical Medicine, Aarhus University Hospital, Denmark.
Abstract
PURPOSE: The aim was to establish a method for performing dynamic exercise during magnetic resonance imaging (MRI) using a slowly increasing workload protocol. METHODS: An ergometer bicycle with a step-wise, exercise protocol was used. Real-time phase-contrast MRI images of the aorta were obtained at each exercise step. RESULTS: In total, 40 participants completed the exercise protocol to reach a mean maximum cardiac output of 13.7±3.7l/min and a heart rate of 150±16beats/min at the highest exercise level. Less than 1% of scans were discarded due to poor quality. CONCLUSIONS: Dynamic, high intensity exercise is feasible during MRI.
PURPOSE: The aim was to establish a method for performing dynamic exercise during magnetic resonance imaging (MRI) using a slowly increasing workload protocol. METHODS: An ergometer bicycle with a step-wise, exercise protocol was used. Real-time phase-contrast MRI images of the aorta were obtained at each exercise step. RESULTS: In total, 40 participants completed the exercise protocol to reach a mean maximum cardiac output of 13.7±3.7l/min and a heart rate of 150±16beats/min at the highest exercise level. Less than 1% of scans were discarded due to poor quality. CONCLUSIONS: Dynamic, high intensity exercise is feasible during MRI.
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