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Objective:To evaluate the predictive value of electrocardiographic S1Q(Ⅲ)T(Ⅲ)pattern in patients with acute pulmonary embolism.Method:ECG was analyzed retrospectively in 102 patients with acute pulmonary embolism confirmed by spiral CT scan and Compared the clinical data between S1Q(Ⅲ)T(Ⅲ)positive and negative getup.Result:In 102 patients 29 cases have positive S1Q(Ⅲ)T(Ⅲ)positive rate was 28.4%.In S1Q(Ⅲ)T(Ⅲ)positive group and S1Q(Ⅲ)T(Ⅲ)negative group,41.4%vs 69.9%have vulnerable diagnosis before admitted,respectively (P