D1

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D1

The first diagonal artery that branches off from the left anterior descending (LAD) coronary artery. Similarly, D2 is the second diagonal branch of the LAD.
References in periodicals archive ?
Technical solution for performance of the INPP Unit D-1 equipment dismantling and decontamination;
The ratings assigned to the class D-1 and class D-2 notes had previously been placed on CreditWatch with negative implications on Aug.
A-1 AAA 250 A-2 AA 60 B A- 30 C BBB 14 D-1 BB 10 D-2 BB 3
4 million class C-2 at `A,' and $45 million class D-1, $37 million class D-2 and $37.