| Opium and | Atherosclerosis | Potential risk factor | [10,11,12,13,14,15,16,17,18] |
| Potential protective factor | [1], [19] |
| Impartial factor | [20,21,22,23,24,25] |
| MI | Potential risk factor | [26,27,28,29,30,31] |
| Potential protective factor | [32,33,34,35] |
| Impartial factor | [36,37,38,39,40] |
| Arrhythmias | Potential risk factor | [41], [37], [21], [39], [42], [43], [44], [45] |
| Potential protective factor | [46] |
| Impartial factor | [47] |
| Ejection Fraction | Potential risk factor | [24], [22], [21, 48], [42], [49], [50] |
| Impartial factor | [1], [12], [26], [32, 47], [16], [3, 51], [38], [33], [23, 39, 52,53,54] |
| Cardiovascular mortality | Potential risk factor | [21], [24], [37], [39], [55] |
| Potential protective factor | [32] |
| Impartial factor | [3], [33], [26], [38], [53], [56], [6, 29, 47, 52, 57, 58] |
