What is the purpose and safety considerations of using microbubble contrast in echocardiography?

• A. Improves border delineation and detection of shunts; generally safe with rare adverse events; use caution in certain right-to-left shunt or pulmonary hypertension scenarios.
• B. Primary purpose is to quantify diastolic function; always unsafe.
• C. It is only used for right heart imaging.
• D. It has widespread adverse events; not recommended.

Answer: (A)