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Kikuchi S, Minamimoto Y, Matsushita K, Cho T, Terasaka K, Hanajima Y, Nakahashi H, Gohbara M, Kimura Y, Yasuda S, Okada K, Matsuzawa Y, Iwahashi N, Kosuge M, Ebina T, Morel O, Ohlmann P, Uchida K, Hibi K. Ratio of left ventricular outflow tract area to aortic annulus area and complete atrioventricular block after transcatheter aortic valve replacement for aortic stenosis. Int J Cardiol 2024; 397:131608. [PMID: 38030042 DOI: 10.1016/j.ijcard.2023.131608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/29/2023] [Accepted: 11/23/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Mechanical compression of cardiac conduction system by transcatheter heart valves leads to complete atrioventricular block (CAVB) after transcatheter aortic valve replacement (TAVR). Bulging of ventricular septum in the left ventricular outflow tract (LVOT) may be associated with greater compression of conduction system, leading to irreversible CAVB. OBJECTIVE This study aimed to investigate the association of ventricular septal bulging with TAVR-related CAVB and permanent pacemaker implantation (PPI). METHODS Among 294 consecutive patients with severe aortic stenosis who underwent TAVR between July 2017 and February 2023, 271 were included in the analysis. As a quantitative evaluation of bulging of the ventricular septum, the ratio of LVOT area to aortic annulus area (L/A ratio) was measured at the systolic phase of computed tomography images. RESULTS TAVR-related CAVB occurred in 64 patients (23.6%). Twenty-eight patients (10.3%) required PPI. The optimal thresholds of L/A ratio for predicting TAVR-related CAVB and PPI were 1.0181 and 0.985, respectively. Patients with less than the cut-off values had higher rate of TAVR-related CAVB and PPI than those above (28.3% vs 13.1%, p = 0.0063; 14.7% vs 4.4%, p = 0.0077, respectively). A multivariate analysis showed that L/A ratio < 1.0181 was an independent predictor of TAVR-related CAVB (odds ratio [OR] 2.65, p = 0.011), in addition to prior right bundle branch block (OR 3.76, p = 0.0005), use of a self-expanding valve (OR 1.99, p = 0.030), and short membranous septum length (OR 0.96, p = 0.037). Only L/A ratio < 0.985 was independently associated with PPI (OR 3.70, p = 0.011). CONCLUSION Low L/A ratio is a predictor of TAVR-related CAVB and PPI.
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Affiliation(s)
- Shinnosuke Kikuchi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Yugo Minamimoto
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Kensuke Matsushita
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Tomoki Cho
- Cardiovascular Center, Yokohama City University Medical Center, Yokohama, Japan
| | - Kengo Terasaka
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Yohei Hanajima
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Hidefumi Nakahashi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Masaomi Gohbara
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Yuichiro Kimura
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Shota Yasuda
- Cardiovascular Center, Yokohama City University Medical Center, Yokohama, Japan
| | - Kozo Okada
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Yasushi Matsuzawa
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Noriaki Iwahashi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Masami Kosuge
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Toshiaki Ebina
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Olivier Morel
- Université de Strasbourg, Pôle d'Activité Médico-Chirurgicale Cardio-Vasculaire, Nouvel Hôpital Civil, Centre Hospitalier Universitaire, 1 Place de L'Hôpital, 67091 Strasbourg, France
| | - Patrick Ohlmann
- Université de Strasbourg, Pôle d'Activité Médico-Chirurgicale Cardio-Vasculaire, Nouvel Hôpital Civil, Centre Hospitalier Universitaire, 1 Place de L'Hôpital, 67091 Strasbourg, France
| | - Keiji Uchida
- Cardiovascular Center, Yokohama City University Medical Center, Yokohama, Japan
| | - Kiyoshi Hibi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan; Department of Cardiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
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