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PLoS By Category | Recent PLoS Articles
Critical Care and Emergency Medicine - Radiology and Medical Imaging

Acute Cardiac Disorder or Pneumonia and Concomitant Presence of Pulmonary Embolism
Published: Tuesday, October 16, 2012
Author: Martin Rohacek et al.

by Martin Rohacek, Zsolt Szucs-Farkas, Carmen A. Pfortmüller, Heinz Zimmermann, Aristomenis Exadaktylos

Purpose

To determine the frequency of apparent acute pulmonary embolism (PE) and of concomitant disease in computed tomography pulmonary angiography (CTPA); to compare the frequency of PE in patients with pneumonia or acute cardiac disorder (acute coronary syndrome, tachyarrhythmia, acute left ventricular heart failure or cardiogenic shock), with the frequency of PE in patients with none of these alternative chest pathologies (comparison group).

Methods

Retrospective analysis of all patients who received a CTPA at the emergency department (ED) within a period of four years and 5 months.

Results

Of 1275 patients with CTPA, 28 (2.2%) had PE and concomitant radiologic evidence of another chest disease; 3 more (0.2%) had PE and an acute cardiac disorder without radiological evidence of heart failure. PE was found in 11 of 113 patients (10%) with pneumonia, in 5 of 154 patients (3.3%) with an acute cardiac disorder and in 186 of 1008 patients (18%) in the comparison group. After adjustment for risk factors for thromboembolism and for other relevant patient’s characteristics, the proportion of CTPAs with evidence of PE in patients with an acute cardiac disorder or pneumonia was significantly lower than in the comparison group (OR 0.13, 95% CI 0.05–0.33, p<0.001 for patients with an acute cardiac disorder, and OR 0.45, 95% CI 0.23–0.89, p?=?0.021 for patients with pneumonia).

Conclusion

The frequency of PE and a concomitant disease that can mimic PE was low. The presence of an acute cardiac disorder or pneumonia was associated with decreased odds of PE.

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