Figure 3.11. An angiogram of normal coronary vessels in an opened heart preparation (vessels filled with radiopaque material). On right is the horizontal main right coronary artery with small dscending twigs. On the left is the major left descending ramus and the horizontal major left circumflex ramus. Between these two are several large diagonal branches. The vessels show progressively diminishing lumina with no irregular narrowings or obstructions.
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