The anatomical variability of striated atrial myocardium surrounding the proximal coronary sinus suggests that muscular fascicles connecting the CS to the left atrium are supplementary rather than obligatory for interatrial conduction.
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Anatomical variability suggests supplementary CS-LA connections for conduction; leaves open their role in human mapping and ablation.
Митрофанова et al. (2005) studied this question.
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