Left atrial diverticula are a common anatomical variant, detected in 41% of patients undergoing routine coronary CT angiography, and are most frequently located anterosuperiorly.
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Supports awareness of left atrial diverticula as common CTA variants to avoid misdiagnosis; leaves open clinical implications.
PURPOSE: The aim of this study was to characterize the frequency and location of left atrial diverticula by using multidetector computed tomography (MDCT). MATERIALS AND METHODS: Cardiac imaging was performed for 454 patients using 64MDCT. Most patients were being examined for coronary artery disease. All images were interpreted by two radiologists on a three-dimensional workstation using multiplanar reformatting, maximum intensity projection, and volumerendering. Diverticula were characterized by localization and diameter. RESULTS: A total of 207 atrial diverticula were diagnosed in 186 (41%) of the 454 patients in this study. The diameters of left atrial diverticula ranged from 2 mm to 16 mm, with an average diameter of 5.2 mm. Left atrial diverticula were located anterosuperiorly in 166 patients (36.6%), anteriorly in four patients (0.9%), anteroinferiorly in three patients (0.7%), inferolaterally in one patient (0.2%), inferomedially in two patients (0.4%), laterally in two patients (0.4%), posterosuperiorly in one patient (0.2%), and superiorly in seven patients (1.5%). CONCLUSION: Left atrial diverticula are frequently detected during routine cardiac computed tomography angiography examinations. From the Departments of Radiology, and Cardiology, GATA Haydarpasa Teaching Hospital, İstanbul, Turkey.
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İncedayı et al. (2012) studied this question.
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