Author + information
- Received August 22, 2016
- Revision received December 1, 2016
- Accepted December 22, 2016
- Published online May 7, 2018.
- Akihisa Kataoka, MD, PhDa,∗ (, )
- Yusuke Watanabe, MDb,
- Ken Kozuma, MD, PhDa,
- Yugo Nara, MDa,
- Fukuko Nagura, MDa,
- Hideyuki Kawashima, MD, PhDa,
- Hirofumi Hioki, MDa,
- Makoto Nakashima, MDa,
- Masanori Yamamoto, MD, PhDb,
- Kensuke Takagi, MDc,
- Motoharu Araki, MDd,
- Norio Tada, MDe,
- Shinichi Shirai, MDf,
- Futoshi Yamanaka, MDg,
- Kentaro Hayashida, MD, PhDh,
- on behalf of the OCEAN-TAVI Investigators
- aDivision of Cardiology, Department of Internal Medicine, Teikyo University Hospital, Tokyo, Japan
- bDivision of Cardiovascular Medicine, Toyohashi Heart Center, Aichi, Japan
- cInterventional Cardiology Unit, New Tokyo Hospital, Chiba, Japan
- dDepartment of Cardiovascular Medicine, Yokohama City Eastern Hospital, Kanagawa, Japan
- eDepartment of Cardiovascular Center, Sendai Kosei Hospital, Miyagi, Japan
- fDepartment of Cardiology, Kokura Memorial Hospital, Fukuoka, Japan
- gDepartment of Cardiovascular Medicine, Shonan Kamakura General Hospital, Kanagawa, Japan
- hDepartment of Cardiology, Keio University School of Medicine, Tokyo, Japan
- ↵∗Address for correspondence:
Dr. Akihisa Kataoka, Division of Cardiology, Department of Internal Medicine, Teikyo University Hospital, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-0003, Japan.
Objectives This study aimed to analyze the prognostic impact of low-flow (LF) severe aortic stenosis in small-body patients undergoing transcatheter aortic valve replacement (TAVR).
Background Western literature demonstrates a poor prognosis with paradoxical LF and low-flow low-gradient (LF-LG) severe aortic stenosis (AS), as defined by stroke volume index (SVi) <35 ml/m2 and mean pressure gradient <40 mm Hg with preserved left ventricular ejection fraction (LVEF). However, this poor prognosis is contested in Japan owing to the smaller body size of Japanese patients relative to that of Western patients. Additionally, there are no reports of the prognostic implication of paradoxical LF or LF-LG severe AS in small-body patients undergoing TAVR.
Methods This was a retrospective analysis of 723 consecutive Japanese patients (median age 85 years; 32.6% male; median body surface area 1.4 m2) who underwent TAVR for severe AS at 9 sites in Japan. The primary and secondary endpoints were cumulative all-cause and cardiovascular mortality after TAVR, respectively.
Results Ninety-seven (13.4%) patients had paradoxical LF severe AS whereas 38 (5.3%) had paradoxical LF-LG with severe AS. PLF was associated with a significant increase in all-cause (hazard ratio [HR]: 3.00; 95% confidence interval [CI]: 1.34 to 6.72; p < 0.001) and cardiovascular mortality (HR: 5.58; 95% CI: 1.19 to 26.2; p < 0.01), as compared with patients’ normal flow and preserved LVEF. PLF-LG was associated with a significant increase in all-cause mortality (HR: 3.76; 95% CI: 1.09 to 13.73; p < 0.01), as compared with normal flow high gradient with preserved LVEF. SVi was an independent predictor of cardiovascular mortality on multivariate analysis after adjustments for age, sex, clinically relevant variables, and other echocardiographic parameters (HR: 1.96; 95% CI: 1.19 to 3.23; p < 0.01).
Conclusions Among Japanese small-body patients with severe AS, both paradoxical LF and LF-LG severe AS were associated with poor outcomes following TAVR. SVi was an independent predictor of cardiovascular mortality after TAVR. (Optimised Transcatheter Valvular Intervention registry [OCEAN-TAVI]; UMIN000020423)
- paradoxical low-flow low-gradient severe aortic stenosis
- paradoxical low-flow severe aortic stenosis
- small body
- stroke volume index
- transcatheter aortic valve replacement
Drs. Watanabe, Yamamoto, Araki, Shirai, Tada, and Hayashida are proctors for transfemoral TAVR for Edwards Lifesciences. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
- Received August 22, 2016.
- Revision received December 1, 2016.
- Accepted December 22, 2016.
- 2018 American College of Cardiology Foundation