D-dimer and helical CT-PA based diagnostic algorithm for PE D-dimer and helical CT-PA based diagnostic algorithm for PE. CT-PA, CT pulmonary angiogram; PE, pulmonary embolism; ELISA, enzyme-linked immunosorbent assay; VTE, venous thromboembolic disease; LE US, lower extremity venous ultrasound for deep venous thrombosis; PA, pulmonary angiogram. (Reproduced, with permission, from van Belle A et al. Effectiveness of managing suspected pulmonary embolism using an algorithm combining clinical probability, D-dimer testing, and computed tomography. JAMA. 2006 Jan 11;295(2):172–9.) Source: Pulmonary Embolism, Quick Medical Diagnosis & Treatment 2017 Citation: Papadakis MA, McPhee SJ. Quick Medical Diagnosis & Treatment 2017; 2017 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/2033/pap17_ch9_f009.png&sec=152416189&BookID=2033&ChapterSecID=152416172&imagename= Accessed: October 30, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved