Extracardiac conduit adequacy along the respiratory cycle in adolescent Fontan patients.
Extracardiac conduit adequacy along the respiratory cycle in adolescent Fontan patients.
复制标题
青少年方丹患者的呼吸周期沿呼吸周期的充分性。
DOI:
10.1093/ejcts/ezab478
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发表时间:
2022-06-15
影响因子:
3.4
通讯作者:
Roest, Arno A. W.
中科院分区:
文献类型:
--
作者:
Rijnberg, Friso M.;van der Woude, Seline F. S.;Hazekamp, Mark G.;van den Boogaard, Pieter J.;Lamb, Hildo J.;de Los Monteros, Covadonga Terol Espinosa;Kroft, Lucia J. M.;Kenjeres, Sasa;Karim, Tawab;Jongbloed, Monique R. M.;Westenberg, Jos J. M.;Wentzel, Jolanda J.;Roest, Arno A. W.
Adequacy of 16–20mm extracardiac conduits for adolescent Fontan patients remains unknown. This study aims to evaluate conduit adequacy using the inferior vena cava (IVC)–conduit velocity mismatch factor along the respiratory cycle. Real-time 2D flow MRI was prospectively acquired in 50 extracardiac (16–20mm conduits) Fontan patients (mean age 16.9 ± 4.5 years) at the subhepatic IVC, conduit and superior vena cava. Hepatic venous flow was determined by subtracting IVC flow from conduit flow. The cross-sectional area (CSA) was reported for each vessel. Mean flow and velocity was calculated during the average respiratory cycle, inspiration and expiration. The IVC–conduit velocity mismatch factor was determined as follows: Vconduit/VIVC, where V is the mean velocity. Median conduit CSA and IVC CSA were 221 mm2 (Q1–Q3 201–255) and 244 mm2 (Q1–Q3 203–265), respectively. From the IVC towards the conduit, flow rates increased significantly due to the entry of hepatic venous flow (IVC 1.9, Q1–Q3 1.5–2.2) versus conduit (3.3, Q1–Q3 2.5–4.0 l/min, P < 0.001). Consequently, mean velocity significantly increased (IVC 12 (Q1–Q3 11–14 cm/s) versus conduit 25 (Q1–Q3 17–31 cm/s), P < 0.001), resulting in a median IVC–conduit velocity mismatch of 1.8 (Q1–Q3 1.5–2.4), further augmenting during inspiration (median 2.3, Q1–Q3 1.8–3.0). IVC–conduit mismatch was inversely related to measured conduit size and positively correlated with conduit flow. The normalized IVC–conduit velocity mismatch factor during expiration and the entire respiratory cycle correlated with peak VO2 (r = –0.37, P = 0.014 and r = –0.31, P = 0.04, respectively). Important blood flow accelerations are observed from the IVC towards the conduit in adolescent Fontan patients, which is related to peak VO2. This study, therefore, raises concerns that implanted 16–20mm conduits have become undersized for older Fontan patients and future studies should clarify its effect on long-term outcome. The Fontan procedure provides a palliative solution for single-ventricle patients, by connecting both the superior vena cava (SVC) and inferior vena cava (IVC) directly to the pulmonary arteries [i.e.
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影响因子:
7.2
作者:
Schwarz EL;Kelly JM;Blum KM;Hor KN;Yates AR;Zbinden JC;Verma A;Lindsey SE;Ramachandra AB;Szafron JM;Humphrey JD;Shin'oka T;Marsden AL;Breuer CK
通讯作者:
Breuer CK
影响因子:
5.7
作者:
Bossers, Sjoerd S. M.;Cibis, Merih;Helbing, Willem A.
通讯作者:
Helbing, Willem A.
影响因子:
1
作者:
Goldberg, David J.;Avitabile, Catherine M.;Paridon, Stephen M.
通讯作者:
Paridon, Stephen M.
DOI:
10.1152/ajpheart.00628.2008
发表时间:
2008-12-01
影响因子:
4.8
作者:
Sundareswaran, Kartik S.;Pekkan, Kerem;Yoganathan, Ajit P.
通讯作者:
Yoganathan, Ajit P.
影响因子:
4.6
作者:
Rijnberg FM;van Assen HC;Juffermans JF;Kroft LJM;van den Boogaard PJ;de Koning PJH;Hazekamp MG;van der Woude SFS;Warmerdam EG;Leiner T;Grotenhuis HB;Goeman JJ;Lamb HJ;Roest AAW;Westenberg JJM
通讯作者:
Westenberg JJM