patients affected by carotid sinus syndrome , when compared with those affected by sick sinus syndrome , showed : a higher prevalence of syncopes ( 97 vs 42 % ) more syncopal episodes per patient ( 2.9 +/- 2 vs 1.8 +/- 0.9 ) , a lower prevalence of associated cardiac diseases ( 53 vs 100 % ) , cardiac enlargement ( 36 vs 88 % ) , heart failure ( 6 vs 36 % ) and paroxysmal atrial fibrillation ( 0 vs 97 % ) , a more frequent indication to vvi pacing ( 75 vs 3 % ) .
C0018787
cardiac
C0018800
cardiac enlargement