Ascending aorta in tetralogy of Fallot: Beyond echocardiographic dimensions

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Cruz, C (Autor) FMUP; Pinho, T (Autor) Outra; Sousa, C (Autor) FMUP; Dias C (Autor) FMUP; Silva Cardoso, J (Autor) FMUP; Maciel MJ (Autor) FMUP

Revista

Título: Echocardiography

Vol. 35

Páginas: 1362-1369

ISSN: 0742-2822

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-00P-M06

DOI: 10.1111/echo.14046

Abstract (EN): BackgroundLate after tetralogy of Fallot (TOF) repair some patients exhibit aortic dilatation and stiffness. Noninvasive assessment of aortic stiffness could contribute to understand this aortopathy and may be important in risk stratification for major aortic event. MethodsWe included prospectively 82 adults after TOF repair and 41 age- and sex-matched normal controls. Aortic diameters were measured by two-dimensional transthoracic echocardiography and the aortic z-score was estimated. Aortic deformation was assessed by M-mode strain and global peak circumferential ascending aortic strain (CAAS), derived from two-dimensional speckle tracking echocardiography (2D-STE). Corrected CAAS was calculated as CAAS/pulse pressure. Ascending aorta (AAo) distensibility and stiffness index were calculated. ResultsTOF patients (age 29.78.4years; follow-up since TOF repair 23.0 +/- 6.8years) had smaller body surface area but a larger aorta compared to controls. TOF patients had lower AAo distensibility (2.2 [0.0-21.0] vs 5.6 [0.0-12.5] cm(2)dyne(-1)10(-6), P<.01), higher aortic stiffness index (9.5 [2.7-98.4] vs 7.1 [2.3-20.4], P=.02) and lower CAAS (6.0 +/- 3.9 vs 8.1 +/- 4.4%, P=.01) compared to controls. CAAS showed a better correlation with AAo z-score (r=-.25, P=.03) compared to M-mode strain. Systemic arterial compliance, arterial stiffness and corrected CAAS (=-0.23, P=.02) were independently associated with AAo diameter. ConclusionsTOF patients have a larger and stiffer AAo compared to controls. CAAS derived from 2D-STE allows a routine noninvasive method for assessing AAo stiffness, with advantages over M-mode strain, and may be used as predictor of major aortic or cardiovascular events.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8