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Comparison of gold standard gated, breath-hold, short-axis evaluation to a real-time, free-breathing, biplane long-axis evaluation. Dotted lines represent mean difference ±1.96 times the standard deviation of the differences. Abbreviations: EDV, end-diastolic volume; ESV, end-systolic volume; SV, stroke volume; EF, ejection fraction; CO, cardiac output; GLS, global longitudinal strain; HR, heart rate.
