Results: CHADS2 ≥3, CHADS2-VAS ≥ 4 and LAVI ≥ 38ml / m2, diagnosis of LAA thrombus has been expected in turn with Se=67% and Sp=70%, Se=67% and Sp=71% and Se=80% and Sp=60%; With LEVF / LAVI ≤1, 5, risk of LAA thrombus was OR=13, 3; 95% CI (1, 8 - 98, 5) with p=0, 001.