The purpose of this clinical research study is to demonstrate the ability of Definity® enhanced versus unenhanced cardiac ultrasound to improve the accuracy and reproducibility of left ventricular ejection fraction (EF) when compared to magnetic resonance imaging (MRI).
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Demonstrate the ability of Definity® enhanced versus unenhanced echocardiography to improve the accuracy of left ventricular ejection fraction when compared to cardiac magnetic resonance imaging (MRI) in a blinded assessment
Timeframe: Following the completion of patient enrollment when the images (ultrasound and MR) were evaluated independently by three blinded readers.