TY - JOUR
T1 - Influence of expanded balloon diameter on palmaz‐schatz stent recoil
AU - Rechavia, Eldad
AU - Litvack, Frank
AU - Macko, Gail
AU - Eigler, Neal L.
PY - 1995/9
Y1 - 1995/9
N2 - After successful stent implantation, the residual luminal diameter of the stented vessel is usually smaller than the maximal stent‐expanded balloon diameter. The goal of this study was to determine whether immediate vessel diameter recoil after Palmaz‐Schatz stenting is affected by the final expanding balloon diameter used during stent deployment. Single Palmaz‐Schatz balloon expandable stents were successfully placed in 108 stenotic lesions. There were 68 patients with 75 saphenous vein graft (SVG) and 30 patients with 33 native coronary artery lesions, including 26 restenotic and 82 de novo occlusive (>50% diameter stenosis) lesions. Quantitative coronary angiography was used for the assessment of stent recoil, defined as the difference between the minimal diameter of the fully expanded balloon and the postprocedure minimal lumen diameter divided by minimal diameter of the fully expanded balloon. A strong correlation (r = 0.94) was found between the minimal diameter of the fully expanded balloon and poststenting minimal lumen diameter. Immediate recoil was 11.3 ± 7.5%, responsible on an average for 0.4 ± 0.2‐mm acute lumen loss. Recoil was less in SVG than in coronary arteries (9.7 ± 6.6% vs. 14.0 ± 7.8%; P = 0.004, and 0.3 ± 0.2 vs. 0.4 ± 0.2 mm; p = 0.01). Lesions were divided into four subgroups, based on the final stent expanding balloon diameter: (1) ⩽3.0 mm (n = 33); (2) >3 ± 3.5 mm (n = 43); (3) >3.5 ± 4 mm (n = 23); and (4) >4 mm (n = 9). For the four subgroups, the percentage recoil values were 15.0 ± 5.7, 10.4 ± 8.2, 9.0 ± 5.4, and 4.7 ± 2.0, respectively (P <0.001). Mean values of diameter stenosis, lesion length, maximal balloon pressure, balloon‐to‐artery ratio, relative vessel stretch, and absolute recoil were not statistically different. Immediate vascular recoil in single implanted Palmaz‐Schatz stent is a function of the final expanding balloon diameter, with recoil larger at small‐balloon diameters and almost eliminated at large inflation diameters. This finding could contribute to less acute gain, increased restenosis, and higher stent thrombosis rates after stenting vessels of <3‐mm diameter. © 1995 Wiley‐Liss, Inc.
AB - After successful stent implantation, the residual luminal diameter of the stented vessel is usually smaller than the maximal stent‐expanded balloon diameter. The goal of this study was to determine whether immediate vessel diameter recoil after Palmaz‐Schatz stenting is affected by the final expanding balloon diameter used during stent deployment. Single Palmaz‐Schatz balloon expandable stents were successfully placed in 108 stenotic lesions. There were 68 patients with 75 saphenous vein graft (SVG) and 30 patients with 33 native coronary artery lesions, including 26 restenotic and 82 de novo occlusive (>50% diameter stenosis) lesions. Quantitative coronary angiography was used for the assessment of stent recoil, defined as the difference between the minimal diameter of the fully expanded balloon and the postprocedure minimal lumen diameter divided by minimal diameter of the fully expanded balloon. A strong correlation (r = 0.94) was found between the minimal diameter of the fully expanded balloon and poststenting minimal lumen diameter. Immediate recoil was 11.3 ± 7.5%, responsible on an average for 0.4 ± 0.2‐mm acute lumen loss. Recoil was less in SVG than in coronary arteries (9.7 ± 6.6% vs. 14.0 ± 7.8%; P = 0.004, and 0.3 ± 0.2 vs. 0.4 ± 0.2 mm; p = 0.01). Lesions were divided into four subgroups, based on the final stent expanding balloon diameter: (1) ⩽3.0 mm (n = 33); (2) >3 ± 3.5 mm (n = 43); (3) >3.5 ± 4 mm (n = 23); and (4) >4 mm (n = 9). For the four subgroups, the percentage recoil values were 15.0 ± 5.7, 10.4 ± 8.2, 9.0 ± 5.4, and 4.7 ± 2.0, respectively (P <0.001). Mean values of diameter stenosis, lesion length, maximal balloon pressure, balloon‐to‐artery ratio, relative vessel stretch, and absolute recoil were not statistically different. Immediate vascular recoil in single implanted Palmaz‐Schatz stent is a function of the final expanding balloon diameter, with recoil larger at small‐balloon diameters and almost eliminated at large inflation diameters. This finding could contribute to less acute gain, increased restenosis, and higher stent thrombosis rates after stenting vessels of <3‐mm diameter. © 1995 Wiley‐Liss, Inc.
KW - balloon angioplasty
KW - coronary artery disease
KW - saphenous vein graft
UR - http://www.scopus.com/inward/record.url?scp=0029096778&partnerID=8YFLogxK
U2 - 10.1002/ccd.1810360105
DO - 10.1002/ccd.1810360105
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
C2 - 7489587
AN - SCOPUS:0029096778
SN - 1522-1946
VL - 36
SP - 11
EP - 16
JO - Catheterization and Cardiovascular Interventions
JF - Catheterization and Cardiovascular Interventions
IS - 1
ER -