Optimal duration of monitoring in patients with unexplained syncope

Manish D Assar, Andrew D Krahn, George J Klein, Raymond Yee, Allan C Skanes
American Journal of Cardiology 2003 November 15, 92 (10): 1231-3
The optimal duration of monitoring of patients with recurrent unexplained syncope who undergo prolonged monitoring with an implantable loop recorder is unknown. We examined the probability of syncope in a group of 167 patients with this condition who underwent prolonged monitoring with an implantable loop recorder. A 12-month monitoring period appears to capture >90% of episodes. Syncope is most likely to occur in younger patients with less heart disease and more frequent syncope. There is a low risk of syncope after 1 year of monitoring without an event.

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