title: A chronic, massive thrombus in the right main pulmonary artery: a case report and echocardiographic analysis.
abstract: A chronic, large thrombus in the right main pulmonary artery (PA) was detected in a 54-year-old woman with a history of surgical repair of atrial septal defect. Color flow imaging revealed a prominent red signal along the right border of the markedly dilated PA. Pulsed Doppler echocardiography showed that the red signal was caused by flow reversal occurring during systole. According to the physics of blood flow, flow reversal probably represents secondary, helical flow, which may be related to thrombus formation.
authors.affiliation: Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Murata
authors.forename: M
authors.initials: M
authors.lastname: Sonoda
authors.forename: F
authors.initials: F
authors.lastname: Watanabe
authors.forename: W
authors.initials: W
authors.lastname: Yang
authors.forename: K
authors.initials: K
authors.lastname: Takenaka
mesh_terms: D004452:Echocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging / Q000473:pathology; D011655:Pulmonary Embolism