D-Dimers explained

The D-dimer test is a marker of blood clotting activity and is not diagnostic of VTE When used appropriately the D-dimer test helps “rule out” VTE if the test is negative and the chance of the patient having a VTE is relatively low

Pulmonary Embolism on CXR

The chest x-ray demonstrates the Hampton hump sign, a dome-shaped area of opacification in the periphery of the left lower lobe.

ECG findings among patients with Acute Pulmonary Embolism

ECG findings among patients with acute PE: tachycardia (38%), T-wave inversion in lead V1 (38%), and ST elevation in aVR (36%). significant EKG findings which predicted mortality were: Heart rate > 100 beats/min, S1Q3T3, complete RBBB, inverted T waves in V1–V4, ST elevation in aVR, atrial fibrillation

The American College of Physicians “best practice advice” for suspected pulmonary embolism

The recommendations, based on a literature review and the best available evidence, include: Use validated prediction rules (e.g., Wells or Geneva tools) to estimate a patient’s pretest probability of acute PE. For patients with a low pretest probability who also meet all Pulmonary Embolism Rule-Out Criteria (PERC), neither D-dimer testing nor imaging should be performed. […]

Emergency Medicine Kenya Foundation

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