Key result
AFL shows no significant difference in pre-cardioversion atrial thrombosis rates compared to AF.
Why the study?
Few and low sample size studies have assessed left and right atrial thrombosis in persistent atrial flutter, with widely varying reported frequencies.
Observational (n=1,081)
Absolute Event Rate: 6.4% vs 10.5%
p-value: p=0.074
Atrial appendage thrombosis is not an infrequent finding in patients with atrial flutter lasting >48 hours, suggesting that TEE screening prior to cardioversion is warranted similarly to atrial fibrillation.
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Thrombosis prevalence in atrial flutter approaches that in fibrillation; extends observational data but leaves open whether TEE screening is routinely warranted.
Cresti et al. (2015) conducted an observational in Atrial flutter and atrial fibrillation (n=1,081). Atrial flutter vs. Atrial fibrillation was evaluated on Atrial thrombosis (p=0.074). Atrial thrombosis was present in 6.4% of patients with atrial flutter compared to 10.5% of patients with atrial fibrillation prior to cardioversion (P=0.074).
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