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Eur J Cardiothorac Surg 2005;28:855-856
© 2005 Elsevier Science NL
Cardiothoracic Surgery, University Hospital, Coimbra, Portugal
(Email: antunes.cct.huc@sapo.pt).
| The first 20% of the full text of this article appears below. |
Despite its apparent simplicity, the anatomy, physiology and physiopathology of the aortic valve have persistently defied the comprehension of the surgeons. Literally, thousands of works have been published on these subjects and it does not cease to surprise us.
In this issue of the journal, Thubrikar et al. [1], from Charlotte, USA, describe an observational study on 14 patients with dilated aortic root and aortic regurgitation who were examined by transesophageal echocardiography. They measured the diameter of the annulus and of the sinotubular junction (STJ), the length of the free edge of the leaflets, and the height of the sinuses and of the leaflets, and compared these measurements with those obtained in silicone moulds of 19 normal human aortic valves. They found that the diameter of the annulus was equivalent and the sinotubular junction diameter was increased in dilated aortic roots, as compared to normal. Strikingly, the aortic sinuses appear to be higher and the leaflets larger than normal. Furthermore, the length of the free edge and the sinus height were all found to be increased in patients with dilated root. That is, their measurements "suggest that these anatomically normal leaflets were, however, not geometrically normal". Finally, they could not correlate the degree of regurgitation with any of the dimensions measured.
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