Assessment of retrograde cardioplegia distribution using contrast echocardiography.
Aronson S, Lee BK, Liddicoat JR, Wiencek JG, Feinstein SB, Ellis JE, Roizen MF, Karp RB. Assessment of retrograde cardioplegia distribution using contrast echocardiography. Ann Thorac Surg. 1991 Oct; 52(4):810-4.