McConnell's sign (echocardiography)
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The McConnell's sign describes a regional pattern of acute right ventricular dysfunction on transthoracic echocardiography first observed in a cohort of patients with acute pulmonary thromboembolism. In contrast to the global wall motion abnormalities observed in chronic right ventricular dysfunction, this sign refers to the coexistence of akinesia of the mid-free right ventricular wall with preserved apical contractility 1.
Subsequent studies have demonstrated a consistently low sensitivity; in the presence of high pretest probability, it may serve as a useful rule-in parameter at the bedside 2,3.