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Abstract
Intravascular ultrasound is a useful tool to assess the adequate stent strut expansion after stent implantation and nowadays it can be also used as a dicision making method about omitting anticoagulant therapy. We used intravascular ultrasound before and after Palmz-Schatz stent implantation in 3 patients with coronary artery narrowings and analysed serial post procedure lumen diameter, cross sectional area. We think it is a useful tool to assess the effect of stent implantation and post stent balloon dilatation.
References
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Fig. 1.
(Case 1) Left: Coronary angiograms of pre(upper) and post(lower) P-S stent implantation(arrows).
Right: Small dissection with movable intimal flap noted at 8 o'clock after stent insertion(upper), open arrow and disappeared after additional higher balloon inflation(lower).
Fig. 2.
(Case 2) Elliptically implanted state of P-S stent with heavy calcification and typical reverberation (arrow, upper) and poststent high pressure balloon dilatation(lower).
Fig. 4.
(Case 3) Measurement of lumen and vessel cross sectional areas after stent implantation by intravascular ultrasound.
Table 1.
Summary of stenosis parameters measured by intravascular ultrasound in 3 stent-implanted patients
| 중례 1 (3.0mm stent) | LCSA(cm2) | VCSA(cm2) | % CSA(%) | LD(mm) | VD(mm) | % DS(%) |
|---|---|---|---|---|---|---|
| Pre ST | 1.86 | 9.15 | 79.7 | 1.37 | 3.30 | 58.5 |
| Post ST | 3.98 | 11.50 | 65.3 | 2.31 | 3.97 | 41.9 |
| Post ST + B∗ | 6.22 | 13.7 | 57.3 | 2.70 | 4.19 | 35.5 |
| 중례 2 (3.0mm stent) | ||||||
| Pre ST | 1.24 | 13.4 | 90.7 | 1.21 | 3.81 | 68.2 |
| Post ST | 3.90 | 2.24 | ||||
| Post ST + B | 4.83 | 2.44 | ||||
| 중례 3 (3.5mm stent) | ||||||
| Pre ST | 1.8 | 14.8 | 88 | 1.7 | 4.8 | 65.6 |
| Post ST + B | 11.5 | 22.1 | 50.7 | 3.68 | 5.36 | 32.3 |
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