Fatih Levent1,2, Oktay Senoz3, Sadık Volkan Emren4, Zeynep Yapan Emren3, Rahman Bilal Gediz5. 1. Bursa Yüksek İhtisas Training and Research Hospital, Bursa, Turkey. fatihlevent85@hotmail.com. 2. , Cumhuriyet Mah, Ozan Sok, Bina no. 10, 5. Kat, D. 9, Nilüfer, 16140, Bursa, Turkey. fatihlevent85@hotmail.com. 3. Çiğli Regional Education Hospital, Bakırçay University, Izmir, Turkey. 4. Ataturk Training and Research Hospital, Izmir Katip Celebi University, Izmir, Turkey. 5. Manisa State Hospital, Manisa, Turkey.
Abstract
BACKGROUND: Coronary artery tortuosity (CAT) is a relatively common finding on coronary angiography and may be associated with impaired left ventricular relaxation and coronary ischemia However, the significance of CAT remains unknown. This study aimed to investigate whether the severity of tortuosity in the targeted coronary segment is a predictor of stent restenosis. METHODS: The study included a total of 637 patients undergoing drug-eluting stent implantation due to stable or unstable angina and who had no native coronary artery stenosis on their last coronary angiogram. The patients were separated into two groups: 312 patients with in-stent restenosis and 325 patients without in-stent restenosis. All patients underwent computed tomography (CT) coronary angiography after invasive angiography and CAT was calculated using the computer software. RESULTS: Patients with in-stent restenosis had higher CAT than those without restenosis (1.25 ± 0.11 vs. 1.11 + 0.07, p < 0.001). Multivariate Cox regression analysis showed that the tortuosity index (hazard ratio [HR]: 1.246 95% confidence interval [CI]: 1.127-1.376 p < 0.001) and the circumflex lesion (HR: 1.437 95% CI: 1.062-1.942 p = 0.019) were independently associated with in-stent restenosis. With the threshold value of severe tortuosity set at 1.15, the prediction of could be made with 81% sensitivity and 80% specificity. CONCLUSION: The severity of tortuosity is proportional to coronary in-stent stenosis in patients with stable and unstable angina pectoris undergoing drug-eluting stent implantation for a severe single coronary artery.
BACKGROUND: Coronary artery tortuosity (CAT) is a relatively common finding on coronary angiography and may be associated with impaired left ventricular relaxation and coronary ischemia However, the significance of CAT remains unknown. This study aimed to investigate whether the severity of tortuosity in the targeted coronary segment is a predictor of stent restenosis. METHODS: The study included a total of 637 patients undergoing drug-eluting stent implantation due to stable or unstable angina and who had no native coronary artery stenosis on their last coronary angiogram. The patients were separated into two groups: 312 patients with in-stent restenosis and 325 patients without in-stent restenosis. All patients underwent computed tomography (CT) coronary angiography after invasive angiography and CAT was calculated using the computer software. RESULTS: Patients with in-stent restenosis had higher CAT than those without restenosis (1.25 ± 0.11 vs. 1.11 + 0.07, p < 0.001). Multivariate Cox regression analysis showed that the tortuosity index (hazard ratio [HR]: 1.246 95% confidence interval [CI]: 1.127-1.376 p < 0.001) and the circumflex lesion (HR: 1.437 95% CI: 1.062-1.942 p = 0.019) were independently associated with in-stent restenosis. With the threshold value of severe tortuosity set at 1.15, the prediction of could be made with 81% sensitivity and 80% specificity. CONCLUSION: The severity of tortuosity is proportional to coronary in-stent stenosis in patients with stable and unstable angina pectoris undergoing drug-eluting stent implantation for a severe single coronary artery.
Authors: Kenichi Fujii; Gary S Mintz; Yoshio Kobayashi; Stéphane G Carlier; Hideo Takebayashi; Takenori Yasuda; Issam Moussa; George Dangas; Roxana Mehran; Alexandra J Lansky; Arlene Reyes; Edward Kreps; Michael Collins; Antonio Colombo; Gregg W Stone; Paul S Teirstein; Martin B Leon; Jeffrey W Moses Journal: Circulation Date: 2004-03-01 Impact factor: 29.690
Authors: Glenn N Levine; Eric R Bates; James C Blankenship; Steven R Bailey; John A Bittl; Bojan Cercek; Charles E Chambers; Stephen G Ellis; Robert A Guyton; Steven M Hollenberg; Umesh N Khot; Richard A Lange; Laura Mauri; Roxana Mehran; Issam D Moussa; Debabrata Mukherjee; Brahmajee K Nallamothu; Henry H Ting Journal: Catheter Cardiovasc Interv Date: 2012-02-15 Impact factor: 2.692
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