Contrast echocardiography for evaluation of myocardial perfusion: effects of coronary angioplasty.
Lang RM, Feinstein SB, Feldman T, Neumann A, Chua KG, Borow KM. Contrast echocardiography for evaluation of myocardial perfusion: effects of coronary angioplasty. J Am Coll Cardiol. 1986 Jul; 8(1):232-5.