TY - RPRT TI - Clinical electrophysiological effects of propranolol on normal sinus node function. AU - M Vasquez AU - R Chuquimia AU - N Shantha AU - M Khan AU - O S Narula PY - 1979 DO - 10.1136/hrt.41.6.709 UR - https://pubmed.ncbi.nlm.nih.gov/465245/ ID - 465245 ER -