Key result
Exposure of 13 different heart valve prostheses to a 1.5-T MRI system produced no measurable deflection, minimal artifacts, and maximum temperature changes of +0.3 degrees C.
Why the study?
Are heart valve prostheses safe when exposed to a 1.5-T MR system?
Population
13 different heart valve prostheses (ex vivo)
Design
Preclinical
Authors
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Supports preclinical MRI compatibility for these prostheses; leaves open human safety confirmation before practice change.
Are heart valve prostheses safe when exposed to a 1.5-T MR system?
MR procedures performed with a 1.5-T MR system can be safely performed in patients with any of the 13 evaluated heart valve prostheses.
Shellock et al. (1994) studied Heart valve prostheses (n=13). 1.5-T (64-MHz) magnetic resonance (MR) system was evaluated on Ferromagnetism, heating, and artifacts. Exposure of 13 different heart valve prostheses to a 1.5-T MRI system produced no measurable deflection, minimal artifacts, and maximum temperature changes of +0.3 degrees C.
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