Class IIb

1. Evaluation of suspected cardiac trauma, repair of acute thoracic dissection without valvular involvement and anastomotic sites during heart and/or lung transplantation.
2. Evaluation of regional myocardial function during and after off-pump CABG surgery.
3. Evaluation of pericardiectomy, pericardial effusions and pericardial surgery.
4. Evaluation of myocardial perfusion, coronary anatomy, or graft patency.
5. Dobutamine stress testing to detect inducible ischemia or predict functional changes after revascularization.
6. Assessment of residual duct flow after interruption of patent ductus arteriosus.