The cumulative effects and clinical safety of repeat magnetic resonance imaging on an MRI-conditional pacemaker system at 1.5 tesla.

8 Another prospective, nonrandomized single-center study included 26 PPM patients who had more than 2 MRI studies suggested sensing attenuation, but their results did not reach statistical significance. 13 Similarly, our analysis of 81 patients showed statistically significant changes in atrial sensing, ventricular PCT, and ventricular lead impedance but found that these changes were clinically irrelevant in degree.

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