paradoxical embolus


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paradoxical embolus

[‚par·ə′däk·sə·kəl em′bə·ləs]
(medicine)
An embolus which is transported to the circulation in peripheral arteries through septal defect in the heart, usually a patent foramen ovale.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
(a) CT scan showing infarct resulting from paradoxical embolus of injected Zopiclone.
If there is a defect in the heart wall separating the top two chambers of the heart, a transvenous (through the vein) extraction can result in a clot, called a paradoxical embolus, that passes from the veins to the arteries and travels to the brain, possibly causing a stroke.
A cryptogenic stroke in the context of a PFO is thought to be caused by a transient right-to-left shunt, enabling development of a paradoxical embolus. In this setting, a transient right-to-left shunt can be produced by maneuvers that increase right atrial pressure (eg, valsalva, pushing, lifting, coughing, defecating).