Long-term morphofunctional remodeling of internal thoracic artery grafts: a frequency-domain optical coherence tomography study

Mario Fulvio Luigi Gaudino, Piergiorgio Bruno, Filippo Crea, Massimo Massetti, Italo Porto, Luca Di Vito, Rocco Vergallo, Giorgia Bonalumi, Francesco Prati, Leonardo Bolognese

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

9 Citazioni (Scopus)

Abstract

BACKGROUND: Internal thoracic arteries (ITAs) are frequently anastomosed to the coronary circulation for bypass grafting. The purpose of this research was to investigate in vivo the long-term morphofunctional changes of ITAs after their use as coronary artery bypass conduits, by comparing the morphological features and vasoreactivity of the grafted left ITA (LITA) with the native, nonharvested right ITA (RITA) in the same patient. METHODS AND RESULTS: At least 10 years after surgery, in 10 patients, LITA graft and nonharvested RITA were assessed by quantitative angiography and frequency-domain optical tomography. Endothelium-dependent and independent vasodilation was tested by selective infusion of acetylcholine and isosorbide dinitrate. Quantitative angiography showed that baseline mean diameter of LITA graft was significantly smaller than that of RITA (2.59 mm [2.29-3.04] versus 3.05 mm [2.75-3.32]; P=0.01). LITA showed a significant intimal thickening (P=0.05) and a nonsignificant medial thinning (P=0.22) compared with RITA, leading to an increased intima-media ratio (intima-media ratio, 0.72 [0.53-0.91] versus 0.23 [0.12-0.38]; P=0.02). The intima-media ratio correlated inversely with the vasodilatatory response in RITA (r=-0.68, P=0.03 for acetylcholine and r=-0.62, P=0.05 for isosorbide dinitrate) but not in LITA (r=-0.18, P=0.63 for acetylcholine and r=-0.11, P=0.75 for isosorbide dinitrate). CONCLUSIONS: Ten years after implantation to the coronary circulation, LITA grafts show intimal thickening, increased intima/media ratio, and maintained endothelium-derived vasodilation. These changes are likely to be an adaptive answer to the different flow dynamics typical of coronary circulation
Lingua originaleEnglish
pagine (da-a)269-276
Numero di pagine8
RivistaCIRCULATION. CARDIOVASCULAR INTERVENTIONS.
DOI
Stato di pubblicazionePubblicato - 2013

Keywords

  • endothelium-dependent vasodilation

Fingerprint Entra nei temi di ricerca di 'Long-term morphofunctional remodeling of internal thoracic artery grafts: a frequency-domain optical coherence tomography study'. Insieme formano una fingerprint unica.

Cita questo