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Updated: Oct 10, 2025

Transthoracic Echocardiographic Examination in the Rabbit Model
Published on: June 1, 2019
Retroaortic Anomalous Coronary Artery Visualization on Transthoracic Echocardiogram
Vladimir Cárdenas López1, Pablo Blanco2
1Consultorio Cardiológico Del Sur, Juan Bautista Alberdi, Tucumán Province, Argentina.
Abstract:
Incidental findings are not uncommon in echocardiography. A transthoracic echocardiogram (TTE) of an adult woman with arterial hypertension showed a tubular structure with hyperechoic walls in the atrial side of the atrioventricular groove in apical views. Coronary computed tomography angiography correlated this finding with a retroaortic course of the anomalous circumflex artery (retroaortic anomalous coronary artery [RAC], benign coronary artery variant). Recently described as the RAC sign on TTE, practitioners should be aware of this finding to avoid mistaken it as artifacts, catheters/leads, or calcified mitral annulus.
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