Q: What is "McConnell's sign"?
Answer: Though describe as an early and specific sign of acute pulmonary embolism (APE), many authorities dispute its specificity related to APE. McConnell's sign is a distinct echocardiographic feature, defined as a regional pattern of right ventricular systolic dysfunction, with akinesia of the mid free wall but sparing of the right ventricular apex.
López-Candales A, Edelman K, Candales MD. Right ventricular apical contractility in acute pulmonary embolism: the McConnell sign revisited. Echocardiography 2010;27:614–20