The Diagnostic Research Of CT Pulmonary Angiography For Right Ventricular Dysfunction In Acute Pulmonary Embolism

Objective:Through analyzed the CT pulmonary angiography(CTPA) images, to evaluate the role of CTPA in detecting right ventricular dysfunction (RVD) by acute pulmonary embolism (APE). Methods:A retrospective collect 47 cases from 2009-2010,who had pulmonary embolism confirmed by the CTPA, and make ultrasound cardiogram (UCG) checks in 48-hour. Selected 47 cases randomly with CTPA checks in the same time, as a control in patients with negative results, make the reference of UCG results, analysis the CTPA diagnose value of RVD caused by PE. Results:Right ventricular maximum cross diameter and maximum area in PE group is greater than the non-PE group, and both has statistics differences (P>0.05).The average value of right ventricular maximum cross diameter and left ventricular maximum cross diameter ratio, and the average value of right ventricular maximum area and left ventricle maximum area are greater than 1 in PE group. In 47 cases, right ventricular dilatation in 15 cases and non- dilatation in 32 cases by CTPA. Right ventricular dilatation in 17 cases, non-dilatation in 30 cases by UCG.Compare with UCG, the diagnose sensitivity 70.59%, specificity 90%, Kappa value is 0.622. The right ventricular maximum cross diameter no statistics differences and maximum area exists statistics differences(P<0.05) between central PE group and around PE group.The average value of right ventricular maximum cross diameter and left ventricular maximum cross diameter ratio are greater than 1 in central PE group and around PE group, The average value of right ventricular area and left ventricular area ratio is greater than the 1. Conclusions:CTPA while accurate diagnosis of pulmonary embolism directly, can diagnose whether patients with pulmonary embolism associated with right ventricle dilatation and right ventricle dysfunction through the imaging. It provide a reliable basis which determine risk factors for pulmonary embolism and early mortality in pulmonary embolism risk rating, and predict prognosis of the patients with PE who are merging RVD.