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==Table 2== | ==Table 2== | ||
{| class="wikitable" style="font-size:90%" | {| class="wikitable" style="font-size:90%; border:1px solid darkgray;" cellspacing="0" | ||
|+'''Characteristics of Type A, B, and C Lesions''' | |+'''Characteristics of Type A, B, and C Lesions''' | ||
|- | |- | ||
! style="width: | ! style="width:300px; border-bottom:1px solid darkgray; background-color:#f2f2f2" | Lesion-Specific Characteristics | ||
|- | |- | ||
| '''Type A lesions (minimally complex)''' | | style="border-bottom:1px solid darkgray" | '''Type A lesions (minimally complex)''' | ||
|- | |- | ||
| Discrete (length <10 mm) | | style="border-bottom:1px solid darkgray; padding-left:12px" | Discrete (length <10 mm) | ||
|- | |- | ||
| Concentric | | style="border-bottom:1px solid darkgray; padding-left:12px" | Concentric | ||
|- | |- | ||
| Readily accessible | | style="border-bottom:1px solid darkgray; padding-left:12px" | Readily accessible | ||
|- | |- | ||
| Nonangulated segment (<45°) | | style="border-bottom:1px solid darkgray; padding-left:12px" | Nonangulated segment (<45°) | ||
|- | |- | ||
| Smooth contour | | style="border-bottom:1px solid darkgray; padding-left:12px" | Smooth contour | ||
|- | |- | ||
| Little or no calcification | | style="border-bottom:1px solid darkgray; padding-left:12px" | Little or no calcification | ||
|- | |- | ||
| Less than totally occlusive | | style="border-bottom:1px solid darkgray; padding-left:12px" | Less than totally occlusive | ||
|- | |- | ||
| Not ostial in location | | style="border-bottom:1px solid darkgray; padding-left:12px" | Not ostial in location | ||
|- | |- | ||
| No major side branch involvement | | style="border-bottom:1px solid darkgray; padding-left:12px" | No major side branch involvement | ||
|- | |- | ||
| Absence of thrombus | | style="border-bottom:1px solid darkgray; padding-left:12px" | Absence of thrombus | ||
|- | |- | ||
| '''Type B lesions (moderately complex)<sup>∗</sup>''' | | style="border-bottom:1px solid darkgray" | '''Type B lesions (moderately complex)<sup>∗</sup>''' | ||
|- | |- | ||
| Tubular (length 10 to 20 mm) | | style="border-bottom:1px solid darkgray; padding-left:12px" | Tubular (length 10 to 20 mm) | ||
|- | |- | ||
| Eccentric | | style="border-bottom:1px solid darkgray; padding-left:12px" | Eccentric | ||
|- | |- | ||
| Moderate tortuosity of proximal segment | | style="border-bottom:1px solid darkgray; padding-left:12px" | Moderate tortuosity of proximal segment | ||
|- | |- | ||
| Moderately angulated segment (>45°, <90°) | | style="border-bottom:1px solid darkgray; padding-left:12px" | Moderately angulated segment (>45°, <90°) | ||
|- | |- | ||
| Irregular contour | | style="border-bottom:1px solid darkgray; padding-left:12px" | Irregular contour | ||
|- | |- | ||
| Moderate or heavy calcification | | style="border-bottom:1px solid darkgray; padding-left:12px" | Moderate or heavy calcification | ||
|- | |- | ||
| Total occlusions <3 mo old | | style="border-bottom:1px solid darkgray; padding-left:12px" | Total occlusions <3 mo old | ||
|- | |- | ||
| Ostial in location | | style="border-bottom:1px solid darkgray; padding-left:12px" | Ostial in location | ||
|- | |- | ||
| Bifurcation lesions requiring double guide wires | | style="border-bottom:1px solid darkgray; padding-left:12px" | Bifurcation lesions requiring double guide wires | ||
|- | |- | ||
| Some thrombus present | | style="border-bottom:1px solid darkgray; padding-left:12px" | Some thrombus present | ||
|- | |- | ||
| '''Type C lesions (severely complex)''' | | style="border-bottom:1px solid darkgray" | '''Type C lesions (severely complex)''' | ||
|- | |- | ||
| Diffuse (length >2 cm) | | style="border-bottom:1px solid darkgray; padding-left:12px" | Diffuse (length >2 cm) | ||
|- | |- | ||
| Excessive tortuosity of proximal segment | | style="border-bottom:1px solid darkgray; padding-left:12px" | Excessive tortuosity of proximal segment | ||
|- | |- | ||
| Extremely angulated segments >90° | | style="border-bottom:1px solid darkgray; padding-left:12px" | Extremely angulated segments >90° | ||
|- | |- | ||
| Total occlusions >3 mo old and/or bridging collaterals | | style="border-bottom:1px solid darkgray; padding-left:12px" | Total occlusions >3 mo old and/or bridging collaterals | ||
|- | |- | ||
| Inability to protect major side branches | | style="border-bottom:1px solid darkgray; padding-left:12px" | Inability to protect major side branches | ||
|- | |- | ||
| Degenerated vein grafts with friable lesions | | style="border-bottom:1px solid darkgray; padding-left:12px" | Degenerated vein grafts with friable lesions | ||
|- | |- | ||
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<li><sup>∗</sup> Although the risk of abrupt vessel closure may be moderately high with Type B lesions, the likelihood of a major complication may be low in certain instances such as in the dilation of total occlusions <3 mo old or when abundant collateral channels supply the distal vessel.</li> | <li><sup>∗</sup> Although the risk of abrupt vessel closure may be moderately high with Type B lesions, the likelihood of a major complication may be low in certain instances such as in the dilation of total occlusions <3 mo old or when abundant collateral channels supply the distal vessel.</li> | ||
</ul> | </ul> | ||
|} | |} | ||
Latest revision as of 05:54, 17 September 2009
Table 2
| Lesion-Specific Characteristics |
|---|
| Type A lesions (minimally complex) |
| Discrete (length <10 mm) |
| Concentric |
| Readily accessible |
| Nonangulated segment (<45°) |
| Smooth contour |
| Little or no calcification |
| Less than totally occlusive |
| Not ostial in location |
| No major side branch involvement |
| Absence of thrombus |
| Type B lesions (moderately complex)∗ |
| Tubular (length 10 to 20 mm) |
| Eccentric |
| Moderate tortuosity of proximal segment |
| Moderately angulated segment (>45°, <90°) |
| Irregular contour |
| Moderate or heavy calcification |
| Total occlusions <3 mo old |
| Ostial in location |
| Bifurcation lesions requiring double guide wires |
| Some thrombus present |
| Type C lesions (severely complex) |
| Diffuse (length >2 cm) |
| Excessive tortuosity of proximal segment |
| Extremely angulated segments >90° |
| Total occlusions >3 mo old and/or bridging collaterals |
| Inability to protect major side branches |
| Degenerated vein grafts with friable lesions |
|