the na/ca2+-vt was abolished by calcium antagonists [ isoptin , d 600 ( 10 ( -4 ) m each ) , mncl2 ( 5 . 10 ( -4 ) m ] and beta-adrenoceptor blocking agents [ propranolol ( 10 ( -4 ) m ) , pindolol ( 10 ( -6 ) m ) ] , but was not suppressed by tetrodotoxin ( up to 10 ( -5 ) m ) .
C0042514
vt
C0033497
propranolol