|JCDR. 2011; 2(3): 186-189
Evaluation of the patients with syncope during the first month after coronary artery bypass graftAbolfath Alizadeh, Majid Kiavar, Mohammad Assadian-Rad, Bahieh Morady, Mohammad Alasti, Ali Sadeghi, Zahra Emkanjoo.
artery disease, especially those with previous myocardial infarction (MI) or left ventricular dysfunction. The
aim of this study was to assess electrophysiologic findings and results of head-up tilt test (HUTT) in patients
with syncope and without orthostatic changes in blood pressure during the first month after coronary artery
bypass graft (CABG). Materials and Methods: A total of 20 patients with syncope during the first month
after CABG were prospectively enrolled in this study from June 2002 to April 2006. Electrophysiologic study
(EPS) was performed in all of them. HUTT was performed in all of the patients regardless of the result of EPS.
Results: The mean age of patients was 60.3±11 years. Twelve patients were males. EPS was negative in 18
patients. HUTT was positive in 10 patients. Six patients had old MI. Ischemic insult occurred in one patient
after CABG. Left bundle branch was present in two patients. There was a significant relationship between the
duration of bed rest after CABG and positive HUTT (P value = 0.021). All of the patients except one did not
experience syncope during the follow-up period. Conclusion: In patients with syncope during the first month
post CABG, in whom an arrhythmic cause is suspected, the other cause of syncope like orthostatic intolerance
should be considered. Being bedridden for an extended period of time post CABG can be a predisposing factor.
Key words: Coronary artery bypass graft, electrophysiologic study, head-up tilt test, syncope