Yonsei Med J.  2012 Jul;53(4):680-684. 10.3349/ymj.2012.53.4.680.

Comparison between Measured and Calculated Length of Side Branch Ostium in Coronary Bifurcation Lesions with Intravascular Ultrasound

• Ryu HM
• Kim BK
• Kim JS
• Ko YG
• Choi D
• Jang Y
• Hong MK

• KMID: 1716863
• DOI: http://doi.org/10.3349/ymj.2012.53.4.680

Abstract

PURPOSE
Accurate evaluation of side branch (SB) ostium could be critical to the treatment of bifurcation lesions. We compared measured and calculated values of side branch ostial length (SBOL) in coronary bifurcation lesions with intravascular ultrasound (IVUS).
MATERIALS AND METHODS
Pre-intervention and post-intervention IVUS was performed in 113 patients who underwent stent implantation of bifurcation lesions. For the IVUS longitudinal reconstruction of the bifurcation lesions, SBOL, SB diameter, and the angle between the distal portion of the main vessel (MV) and SB were directly measured. In addition, SBOL was calculated as: SB diameter/sin (angle between distal MV and SB). The relationship between measured and calculated SBOL was then evaluated.
RESULTS
The angled between the distal MV and SB were 57.3+/-12.4degrees at pre-intervention and 59.4+/-12.6degrees at post-intervention. The mean measured and calculated SBOL values were 2.91+/-0.86 mm and 3.06+/-0.77 mm at pre-intervention and 2.79+/-0.82 mm and 2.92+/-0.69 mm at post-intervention, respectively. Differences between measured and calculated SBOL were 0.15+/-0.44 mm at pre-intervention and 0.13+/-0.41 mm at post-intervention. We found that calculated SBOL was correlated with measured SBOL (pre-intervention r=0.863, p<0.001; post-intervention r=0.868, p<0.001).
CONCLUSION
There was a good correlation between measured and calculated SBOLs of the bifurcation lesions in IVUS longitudinal reconstruction. SBOL in the bifurcation lesions can therefore be estimated using the SB diameter and the angle between distal MV and SB.

Keyword

Coronary artery disease; ultrasonics; bifurcation

MeSH Terms

Aged
Angioplasty, Balloon, Coronary
Coronary Angiography
Coronary Artery Disease/surgery/*ultrasonography
Coronary Vessels/*ultrasonography
Female
Humans
Male
Middle Aged
Ultrasonography, Interventional

Figure

• 

  Fig. 1 Intravascular ultrasound (IVUS) measurements in this study are shown in a schematic diagram (A) and an actual IVUS image (B); side branch diameter (a), angle between distal main vessel and side branch (b), and side branch ostium length (c).

• 

  Fig. 2 The correlation between the measured and calculated values of the side branch ostium length are shown; pre-intervention r=0.863, p<0.001 (A) and post-intervention r=0.868, p<0.001 (B).

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