The coronary sinus possesses anatomical and histological features of a true cardiac chamber rather than just a vein.
May inform CS interventions; leaves open functional validation in clinical studies.
The coronary sinus (CS), traditionally considered merely a great cardiac vein, is shown to display anatomic characteristics of a true cardiac chamber: endocardium, striated myocardium, epicardium and a specific conduction system.
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Barceló et al. (2004) studied this question.
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