Lumason® Infusion vs. Bolus Administrations

Inclusion Criteria: * Are at least 18-years old; * Have suboptimal LV EBD, defined as ≥2 adjacent segments in any apical view that cannot be visualized, at pre-contrast echocardiogram; * Provide their written informed consent and are willing to comply with protocol requirements. Exclusion Criteria: * Patient has severe congestive heart failure (class IV according to the classification of the New York Heart Association); * Patient has uncontrolled angina (i.e., uncontrolled on medication); * Patient had a recent myocardial infarction (within the last 3 days and not stabilized); * Patient has severe arrhythmia, that in the opinion of the Investigator, would interfere with the study conduct; * Patient has severe pulmonary hypertension, that in the opinion of the Investigator, would interfere with the study conduct; * Patient had been treated with any other contrast medium, either intravascular or orally, within 48 hours prior to the first administration; * Has any known allergy to one or more of the ingredients of the investigational product; * Is pregnant or lactating. Exclude the possibility of pregnancy by: testing on site (serum or urine βHCG) prior to the start of investigational product administration; surgical history (e.g., tubal ligation or hysterectomy); post-menopausal with a minimum 1 year without menses; * Has previously entered the study or have received any other investigational drug within 30 days prior to admission in this study; * Is determined by the Investigator that the patient is clinically unsuitable for the study.