RESUMO
Because of the functional importance of the Papillary Muscles (PM) we conducted this study on the blood supply of these structures in the right ventricle. The main vessels of the musculli papillares parvi are the ramus septalis of the ramus interventricularis subsinuosus (RSSS), helped by the ramus septalis of the arteria coronaria dextra (RSCD) and the first ramus septalis of theramus interventricularis paraconalis (RSPC). Themusculi papillares magnus receives vessels mainly from theramus ventricularis of the a. coronaria dextra (RVCD) associated with the RSPC, or RSSS. Themmusculus papillaris subarteriosus receives vessels only from the RSCD. In each papillary muscle there is an arterial circle (a double blood supply), which is an anatomical arrangement protecting these structures against vascular problems.