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Early results of Bentall-type operations during the last 10 years: comparison of mechanical valves and stentless bioprostheses

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Abstract

Objective

Various types of prostheses have been used for combined diseases of the aortic root and ascending aorta.

Methods

All Bentall-type operations (n = 64) between 1996 and 2005 were retrospectively studied, comparing different types of prosthesis in the aortic position. The patients were 29–87 years old (mean 59.5 ± 14.0 years) and included 47 men and 17 women. Mechanical valves, stentless bioprostheses (Freestyle), stented bioprostheses, and a homograft were used in 31, 29, 3, and 1 patients, respectively. Early results, especially hemodynamics, were analyzed among two groups: mechanical valve group (M-group) and Freestyle group (F-group).

Results

The average age was significantly higher in the F-group (62.8 ± 12.7 years) than in the M-group (54.9 ± 14.0 years) (P = 0.025). The implanted valve was significantly larger in the F-group (26.0 ± 2.3 mm) than in the M-group (23.5 ± 2.1 mm) (P = 0.000). The estimated effective orifice area of the prosthesis was significantly larger in the F-group (2.23 ± 0.38 cm2) than in the M-group (1.84 ± 0.49 cm2) (P = 0.001). The pressure gradient across the prosthesis was significantly lower in the F-group (18.6 ± 5.5 mmHg) than in the M-group (25.4 ± 7.6 mmHg) (P = 0.001).

Conclusion

The Bentall-type procedure using the Freestyle valve has an advantage regarding hemodynamics compared to the procedure employing mechanical prostheses.

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Authors and Affiliations

  1. Department of Cardiovascular Surgery, Shin-Tokyo Hospital, Nemoto 473-1, Matsudo, Chiba, 271-0077, Japan

    Koki Nakamura MD, PhD, Tomohiro Asai MD, PhD, Mikiko Murakami MD, Yosuke Saitoh MD & Hiroki Yamaguchi MD, PhD

Authors
  1. Koki Nakamura MD, PhD
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  2. Tomohiro Asai MD, PhD
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  3. Mikiko Murakami MD
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  4. Yosuke Saitoh MD
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  5. Hiroki Yamaguchi MD, PhD
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Correspondence to Koki Nakamura MD, PhD.

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Nakamura, K., Asai, T., Murakami, M. et al. Early results of Bentall-type operations during the last 10 years: comparison of mechanical valves and stentless bioprostheses. Gen Thorac Cardiovasc Surg 55, 6–11 (2007). https://doi.org/10.1007/s11748-006-0061-y

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  • DOI: https://doi.org/10.1007/s11748-006-0061-y

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