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Twenty-year outcomes of free and I-composite radial artery grafts for coronary artery revascularization

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Abstract

Purpose

To compare the 20-year outcomes of coronary artery grafting (CABG) using radial artery (RA) grafts (free and I-composite) and internal thoracic artery (ITA) grafts.

Methods

Long-term graft patency was evaluated in patients who underwent isolated CABG between August, 1996 and January, 2022. The long-term graft patency of free RA grafts, I-composite ITA-RA grafts, and saphenous vein (SV) grafts were compared.

Results

The RA was used as a coronary bypass conduit in 111 of the 246 patients enrolled in this study. The RA patency after 10 and 20 years was 94.2% and 76.6%, respectively. Landmark analysis showed that although graft patency for up to 10 years did not differ between the RA and ITA grafts (hazard ratio = 0.87; P = 0.8), patency of the ITA grafts was better from 10 to 20 years post-surgery (hazard ratio = 0.19; P = 0.013). The 20-year graft patency of the I-composite RA grafts was better than that of the free RA grafts (80.0% vs. 72.4%; P = 0.029), but not significantly different from that of the ITA grafts (80.0% vs. 90.7%; P = 0.24).

Conclusions

The 20-year patency of the I-composite ITA-RA graft was better than that of the free RA graft; therefore, the I-composite graft may be an effective conduit for CABG.

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Data availability

The data underlying this article will be shared on reasonable request to the corresponding author.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Department of Cardiovascular Surgery, Otaru General Hospital, 1-1-1 Wakamatsu, Otaru, 047-8550, Japan

    Hiroshi Sato, Joji Fukada, Yu Iwashiro & Yukihiko Tamiya

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  1. Hiroshi Sato
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  2. Joji Fukada
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  3. Yu Iwashiro
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  4. Yukihiko Tamiya
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Correspondence to Hiroshi Sato.

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Sato, H., Fukada, J., Iwashiro, Y. et al. Twenty-year outcomes of free and I-composite radial artery grafts for coronary artery revascularization. Surg Today 53, 1132–1138 (2023). https://doi.org/10.1007/s00595-023-02679-9

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  • DOI: https://doi.org/10.1007/s00595-023-02679-9

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