Entrapment of a floating thrombus in the right atrium by persistent Chiari's network: a barrier to massive pulmonary embolism
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Updated: Jul 9, 2026

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet
Published on: November 4, 2015
Abstract:
Syncope may be a manifestation of pulmonary embolism. Occlusion of a pulmonary artery with cardiac output drop, sometimes resulting in cardiac arrest, is the main underlying mechanism. In this letter we describe the case of a patient in which the persistence of a long remnant of the embryonal Chiari's network could have worked as an anatomic barrier preventing massive pulmonary embolism and cardiac arrest.
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