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Clinical importance of the supra-isthmic anastomosis between the superior thyroid arteries in six cases of occlusion of the common carotid artery

Importance clinique de l'anastomose supra-isthmique entre les artères thyroïdiennes supérieures dans 6 cas d'occlusion de l'artère carotide commune

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Summary

In six cases of occlusion of a single common carotid artery, antegrade blood flow was demonstrable in the ipsilateral internal carotid artery by doppler ultrasonography. Antegrade blood flow was also observed in the intracranial portion of the internal carotid artery, comparatively reduced and irregular with respect to that of the corresponding contralateral artery. Studies by color doppler ultrasound and digital subtraction angiography revealed the presence of a collateral arch that passed through the supra-isthmic anastomosis between the superior thyroid arteries. All six subjects examined had presented with neurological deficits that subsequently almost completely regressed. The regression of symptomatology indicates the clinical importance of the collateral circle.

Résumé

Dans 6 cas d'occlusion d'une seule a. carotide commune, un flux sanguin antérograde dans l'a. carotide interne ipsilatérale a été prouvé par ultrasonographie doppler. Un flux sanguin antérograde était également observé dans la partie intra-crânienne de l'a. carotide interne, mais il était irrégulier et réduit en comparaison avec celui de l'a. homonyme controlatérale. Le doppler couleur et l'angiographie digitalisée avec soustraction ont révélé la présense d'une circulation collatérale qui empruntait l'anastomose supra-isthmique unissant les deux aa. thyroïdiennes supérieures. Ces six patients examinés avaient présenté des déficits neurologiques qui ont ensuite presque complètement régressés. La régression de la symptomatologie indique l'importance clinique de la circulation collatérale.

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Macchi, C., Catini, C. Clinical importance of the supra-isthmic anastomosis between the superior thyroid arteries in six cases of occlusion of the common carotid artery. Surg Radiol Anat 17, 65–69 (1995). https://doi.org/10.1007/BF01629503

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