CTICasesSinoatrial Nodal Branch Collateral
Imaging findings
Coronary angiogram and CT chest show an abnormally dilated sinoatrial nodal branch arising from the right coronary artery, coursing through the mediastinum to connect with the bronchial arterial circulation in the right hilum.
Key takeaways
An enlarged sinoatrial nodal artery can serve as a collateral channel to the bronchial circulation in patients with severe pulmonary hypertension or chronic thromboembolic pulmonary hypertension (CTEPH).
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