both paroxysmal and permanent forms of reciprocating tachycardia must be differentiated from tachycardias located in the atria : one of the most reliable features of reciprocating tachycardia is the existence of a 1:1 a-v relationship which can not be altered without interrupting the tachycardia .
C0242514
reciprocating tachycardia
C0039231
tachycardia