between 1979 and 1984 , 44 patients underwent implantation of these devices , 12 with atrial leads for supraventricular tachycardias ( 8 orthodromic reciprocating tachycardias , 1 intranodal junctional tachycardia and 3 atrial tachycardias ) , and 32 with ventricular leads for ventricular tachycardias .
C0039240
supraventricular
C0039235
junctional