Usefulness of coronary pressure measurement for functional evaluation of drug-eluting stent restenosis

Chang Wook Nam, Seung Woon Rha, Bon Kwon Koo, Joon Hyung Doh, Woo Young Chung, Myeong Ho Yoon, Seung Jea Tahk, Bong Ki Lee, Jin Bae Lee, Ki Dong Yoo, Yun Kyeong Cho, In Sung Chung, Seung Ho Hur, Kwon Bae Kim, Cheol Ung Choi, Dong Joo Oh

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Abstract

Despite the widespread adoption of drug-eluting stent (DES) implantation, the optimal treatment of DES failures remains challenging. The present study evaluated the relation between quantitative angiography and the fractional flow reserve (FFR) in restenotic lesions after DES implantation and the efficacy of FFR in determining whether to treat these lesions. To assess their functional significance, the coronary pressure-derived FFR was measured in 50 DES restenotic lesions (49 patients). Additional intervention was performed in lesions with a FFR <0.8. Major adverse cardiac events were assessed at 12 months after the reintervention procedure. The mean percent diameter stenosis (%DS) was 58 ± 13%. Of the 50 lesions, 20 (40%) were deferred without additional intervention. The FFR and %DS had a negative correlation (r = -0.61, p <0.001). However, when only the lesions with diffuse-type restenosis (15 lesions) were analyzed, the degree of correlation decreased (r = -0.56, p = 0.12). Although most lesions (89%) with a %DS of <70 had significant functional ischemia, among 41 lesions with a %DS <70, only 20 (49%) had demonstrated functional patency. The incidence of adverse events during the 12 months of follow-up after FFR-guided treatment was 18.0% (23.3% in the FFR <0.80 group and 10.0% in FFR <0.80 group). In conclusion, a discrepancy was found between functional ischemia measured by the FFR and the angiographic %DS, in particular, in moderate- or diffuse-type restenotic lesions after DES implantation. The outcome of FFR-guided deferral in patients with DES in-stent restenosis seems favorable.

Original languageEnglish
Pages (from-to)1783-1786
Number of pages4
JournalAmerican Journal of Cardiology
Volume107
Issue number12
DOIs
Publication statusPublished - 2011 Jun 15

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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    Nam, C. W., Rha, S. W., Koo, B. K., Doh, J. H., Chung, W. Y., Yoon, M. H., Tahk, S. J., Lee, B. K., Lee, J. B., Yoo, K. D., Cho, Y. K., Chung, I. S., Hur, S. H., Kim, K. B., Choi, C. U., & Oh, D. J. (2011). Usefulness of coronary pressure measurement for functional evaluation of drug-eluting stent restenosis. American Journal of Cardiology, 107(12), 1783-1786. https://doi.org/10.1016/j.amjcard.2011.02.328