Ultrasound contrast is recommended in echocardiography when...

• A. Should be used in all echoes
• B. When endocardial borders are poorly defined or LV opacification is suboptimal; improves border delineation, enables accurate LV volumes and detection of LV thrombus
• C. Only used for right heart imaging
• D. Not recommended for LV thrombus detection

Answer: (B)