TY - RPRT TI - Sinus node echoes and concealed concealed conduction: additional sinus node phenomena confirmed in man by direct sinus node electrography. AU - J A Reiffel AU - J T Bigger AU - K Ferrick AU - F D Livelli AU - J Gliklich AU - P Wang AU - R Bosner PY - 1985 DO - 10.1016/s0022-0736(85)80050-9 UR - https://pubmed.ncbi.nlm.nih.gov/4031729/ ID - 4031729 ER -