among a series of consecutive patients treated with permanent pacemaker between 1965 and 1976 , 43 had sinoatrial disease with paroxysmal tachycardia ( group a ) , 30 sinoatrial disease without tachycardia ( group b ) and 165 atrioventricular block ( group c ) .
C0039236
paroxysmal tachycardia
C0039231
tachycardia