Hisato Ito1,2, Toru Mizumoto1, Yu Shomura1, Yasuhiro Sawada1, Ko Kajiyama1, Hideto Shimpo2. 1. Department of Cardiothoracic Surgery, Anjo Kosei Hospital, 28 Higashi-Hirokute, Anjo City, Aichi, 446-8602, Japan. 2. Department of Thoracic and Cardiovascular Surgery, Mie University, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan.
Abstract
BACKGROUND: Conventional indices such as prosthetic valve effective orifice area (EOA) or transvalvular pressure gradients (TPG) may be unreliable in predicting left ventricular (LV) reverse remodeling after aortic valve replacement (AVR). We hypothesized that the global LV afterload, including valvular and arterial impedance, could influence LV reverse remodeling after AVR. METHODS: Twenty-three consecutive aortic-stenosis patients (mean age, 76 ± 6.4 years) underwent isolated AVR using contemporary externally wrapped pericardial valves (19 mm, 10 patients; 21 mm 11; 23 mm, 2). Valvuloarterial impedance (Zva), a marker of global LV afterload, was measured on serial echocardiography in addition to indexed EOA, energy loss index (ELI), mean TPG, and stroke work loss. LV mass regression was used as a parameter of LV reverse remodeling. RESULTS: The Zva significantly decreased after AVR (5.05 ± 1.7 mmHg/mL/m2 , pre-operatively; 3.12 ± 1.0, postoperatively; 3.13 ± 0.89, at last follow-up) in parallel with increased indexed EOA (0.46 ± 0.13 cm2 /m2 ; 1.13 ± 0.24; 0.96 ± 0.19), ELI (0.55 ± 0.21 cm2 /m2 ; 1.74 ± 0.52; 1.47 ± 0.42), and decreased mean TPG (50.2 ± 19.6 mmHg; 11.1 ± 5.4; 14.7 ± 5.8). The stroke work loss also decreased (26.3 ± 8.5 %; 8.65 ± 4.0; 9.36 ± 3.4). The Zva at last follow-up was significantly correlated with LV mass regression (correlation coefficient, r = - 0.48; P = 0.002), and was a significant predictor of LV reverse remodeling on multiple regression analysis (adjusted odds ratio, -0.43; 95% confidence interval, -31.3 to -0.67, P = 0.042), while indexed EOA, ELI, mean TPG, or systemic arterial compliance were not. CONCLUSIONS: The postoperative Zva was significantly associated with LV mass regression after AVR. Maintaining low global LV afterload following AVR may enhance LV reverse remodeling.
BACKGROUND: Conventional indices such as prosthetic valve effective orifice area (EOA) or transvalvular pressure gradients (TPG) may be unreliable in predicting left ventricular (LV) reverse remodeling after aortic valve replacement (AVR). We hypothesized that the global LV afterload, including valvular and arterial impedance, could influence LV reverse remodeling after AVR. METHODS: Twenty-three consecutive aortic-stenosispatients (mean age, 76 ± 6.4 years) underwent isolated AVR using contemporary externally wrapped pericardial valves (19 mm, 10 patients; 21 mm 11; 23 mm, 2). Valvuloarterial impedance (Zva), a marker of global LV afterload, was measured on serial echocardiography in addition to indexed EOA, energy loss index (ELI), mean TPG, and stroke work loss. LV mass regression was used as a parameter of LV reverse remodeling. RESULTS: The Zva significantly decreased after AVR (5.05 ± 1.7 mmHg/mL/m2 , pre-operatively; 3.12 ± 1.0, postoperatively; 3.13 ± 0.89, at last follow-up) in parallel with increased indexed EOA (0.46 ± 0.13 cm2 /m2 ; 1.13 ± 0.24; 0.96 ± 0.19), ELI (0.55 ± 0.21 cm2 /m2 ; 1.74 ± 0.52; 1.47 ± 0.42), and decreased mean TPG (50.2 ± 19.6 mmHg; 11.1 ± 5.4; 14.7 ± 5.8). The stroke work loss also decreased (26.3 ± 8.5 %; 8.65 ± 4.0; 9.36 ± 3.4). The Zva at last follow-up was significantly correlated with LV mass regression (correlation coefficient, r = - 0.48; P = 0.002), and was a significant predictor of LV reverse remodeling on multiple regression analysis (adjusted odds ratio, -0.43; 95% confidence interval, -31.3 to -0.67, P = 0.042), while indexed EOA, ELI, mean TPG, or systemic arterial compliance were not. CONCLUSIONS: The postoperative Zva was significantly associated with LV mass regression after AVR. Maintaining low global LV afterload following AVR may enhance LV reverse remodeling.
Authors: Christian Basile; Ilaria Fucile; Maria Lembo; Maria Virginia Manzi; Federica Ilardi; Anna Franzone; Costantino Mancusi Journal: J Clin Med Date: 2021-11-26 Impact factor: 4.241