Large Left Atrial Appendage Causing Cryptogenic Stroke

Cryptogenic stroke is a subtype of ischemic stroke for which no identifiable cause is found after routine diagnostic evaluation. It accounts for roughly 25% of ischemic strokes. Structural cardiac abnormalities such as patent foramen ovale, atrial septal defect (ASD), and a large left atrial appenda...

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Bibliographic Details
Published in:Curēus (Palo Alto, CA) CA), 2019-10, Vol.11 (10)
Main Authors: Cinelli, Michael, Shadi, Mahmoud, El-Hosseiny, Sherif, Daneshvar, Farshid, Tamburrino, Frank
Format: Article
Language:English
Subjects:
Blood clots
Cardiac arrhythmia
Cardiology
Cardiovascular disease
Case reports
Family medical history
Flow velocity
Heart
Hospitals
Internal Medicine
Morphology
Neurology
Pathogenesis
Patients
Stroke
Thromboembolism
Ultrasonic imaging
Veins & arteries
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Summary:Cryptogenic stroke is a subtype of ischemic stroke for which no identifiable cause is found after routine diagnostic evaluation. It accounts for roughly 25% of ischemic strokes. Structural cardiac abnormalities such as patent foramen ovale, atrial septal defect (ASD), and a large left atrial appendage (LAA) are commonly associated risk factors in patients with cryptogenic stroke. We report a case of a patient with a history of a surgically repaired ASD found to have a large LAA without identifiable thrombus on both transthoracic echocardiogram and transesophageal echocardiogram after presenting with an acute cryptogenic stroke in the absence of any arrhythmias. We aim to emphasize the importance of the LAA, particularly if large, in the pathogenesis and development of cryptogenic strokes. Additionally, we discuss the necessity for clearly defined guidelines on whether to start anticoagulation in these patients.
ISSN:2168-8184
2168-8184
DOI:10.7759/cureus.5991