Significance of Papillary and Trabecular Muscular Volume in Right Ventricular Volumetry with Cardiac MR Imaging.

IF 3.2
Yuki Shibagaki, Hideharu Oka, Rina Imanishi, Sorachi Shimada, Kouichi Nakau, Satoru Takahashi
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Abstract

Purpose: Pulmonary valve regurgitation after repaired Tetralogy of Fallot (TOF) or double-outlet right ventricle (DORV) causes hypertrophy and papillary muscle enlargement. Cardiac magnetic resonance imaging (CMR) can evaluate the right ventricular (RV) dilatation, but the effect of trabecular and papillary muscle (TPM) exclusion on RV volume for TOF or DORV reoperation decision is unclear.

Methods: Twenty-three patients with repaired TOF or DORV, and 19 healthy controls aged ≥15, underwent CMR from 2012 to 2022. TPM volume is measured by artificial intelligence. Reoperation was considered when RV end-diastolic volume index (RVEDVI) >150 mL/m2 or RV end-systolic volume index (RVESVI) >80 mL/m2.

Results: RV volumes were higher in the disease group than controls (P α 0.001). RV mass and TPM volumes were higher in the disease group (P α 0.001). The reduction rate of RV volumes due to the exclusion of TPM volume was 6.3% (2.1-10.5), 11.7% (6.9-13.8), and 13.9% (9.5-19.4) in the control, volume load, and volume α pressure load groups, respectively. TPM/RV volumes were higher in the volume α pressure load group (control: 0.07 g/mL, volume: 0.14 g/mL, volume α pressure: 0.17 g/mL), and correlated with QRS duration (R α 0.77). In 3 patients in the volume α pressure, RV volume included TPM was indicated for reoperation, but when RV volume was reduced by TPM removal, reoperation was no indicated.

Conclusion: RV volume measurements, including TPM in volume α pressure load, may help determine appropriate volume recommendations for reoperation.

乳头状肌和小梁肌体积在心脏磁共振右室体积测量中的意义。
目的:修复法洛四联症(TOF)或右心室双出口(DORV)后肺动脉瓣返流引起肥大和乳头肌增大。心脏磁共振成像(CMR)可以评估右心室(RV)的扩张,但排除小梁和乳头肌(TPM)对右心室(RV)体积的影响在TOF或DORV再手术决策中尚不清楚。方法:2012年至2022年,23例修复TOF或DORV患者和19例年龄≥15岁的健康对照进行了CMR。TPM体积由人工智能测量。当右心室舒张末期容积指数(RVEDVI) >150 mL/m2或右心室收缩末期容积指数(RVESVI) >80 mL/m2时考虑再手术。结果:疾病组RV体积高于对照组(P α 0.001)。病变组右心室质量和TPM体积较高(P α 0.001)。对照组、容积负荷组和容积α压力负荷组排除TPM容积后RV容积减少率分别为6.3%(2.1 ~ 10.5)、11.7%(6.9 ~ 13.8)和13.9%(9.5 ~ 19.4)。体积α压力负荷组(对照组:0.07 g/mL,体积:0.14 g/mL,体积α压力:0.17 g/mL) TPM/RV体积较高,且与QRS持续时间相关(R α 0.77)。3例体积α压患者,包括TPM的右心室体积提示再次手术,TPM去除后右心室体积缩小,提示不提示再次手术。结论:RV容积测量,包括容积α压力负荷下的TPM,可能有助于确定再手术的合适容积建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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