TY - RPRT TI - Protamine and left ventricular function: a transesophageal echocardiography study. AU - M R Del Re AU - J D Ayd AU - L W Schultheis AU - E S Heitmiller PY - 1993 DO - 10.1213/00000539-199312000-00003 UR - https://pubmed.ncbi.nlm.nih.gov/8250297/ ID - 8250297 ER -