Table 2 Distribution of visibility grades of the cardiac veins
| Â | Visibility grade n (%) | ||||
|---|---|---|---|---|---|
| Â | 1 | 2 | 3 | 4 | Mean |
CS | 0 (0) | 0 (0) | 0 (0) | 48 (100) | 4.0 |
PIV | 0 (0) | 0 (0) | 27 (56) | 21 (44) | 3.4 |
PVLV | 0 (0) | 0 (0) | 26 (62) | 16 (38) | 3.4 |
LMV | 2 (6) | 5 (15) | 18 (55) | 8 (24) | 3.0 |
AIV | 0 (0) | 0 (0) | 27 (71) | 11 (29) | 3.3 |