CT obstructive index and systolic blood pressure at the time of diagnosis of pulmonary thromboemboli

Background: Recognition of imaging findings in pulmonary emboli and their association with homodynamic factors is important for prompt diagnosis, treatment, and reduction of its morbidity. The main objective in current study was to determine the correlation between CT obstructive index in pulmonary thromboembolism and systolic blood pressure at the time of diagnosis.Materials and Methods: In this observational crosssectional comparative study, 70 consecutive patients with pulmonary emboli admitted in Modarress Hospital (Tehran, Iran) among 201317 were enrolled and correlation between CT obstructive index on pulmonary CT angiography and systolic blood pressure at the time of diagnosis was determined.Results: The correlation between CT index and hypotension (systolic blood pressure≤90) in our studied patients was significant (P=0.0001) and the mean CT index in hypotensive and normotensive patients was 56.4% and 27.5%, respectively. The CT obstructive index cutoff point of 53.75% resulted in sensitivity and specificity of 87.5% and 96.3%, for hypotension prediction.Conclusion: According to the obtained results it may be concluded that there is significant correlation between CT obstructive Index in patients with pulmonary thromboembolic and systolic blood pressure at the time of diagnosis and be calculating the CT obstructive index the possibility of hypotension related to massive emboli could be predicted.