McCollen sign in Acute PTE McConnell's sign is a distinct echocardiographic finding of right ventricular (RV) dysfunction, characterized by the RV free wall becoming immobile (akinesia) while the apex remains hyperkinetic (moves normally or even more than normal). It is a strong indicator of acute pulmonary embolism (PE) but is not specific to it, as other conditions that increase pulmonary vascular resistance can cause a similar effect. Identifying this sign can help guide emergency treatment d
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What is McConnell's Sign?
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McConnell Sign in Acute Pulmonary Embolism 1. Definition McConnell’s sign is an echocardiographic finding characterized by: Akinesia or severe hypokinesia of the mid right ventricular (RV) free wall With preserved normal contractility of the RV apex This pattern is called “apical sparing.” It is classically associated with acute massive or submassive pulmonary embolism, causing sudden RV pressure overload. --- 2. Significance & Specificity Diagnostic value: Specificity: Very high — around 94–98%
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