abnormal aortic sinus morphology any structural anomaly of the spaces betwen the superior aspect of each of the three cusps of the aortic valve and the dilated portion of the wall of the ascending aorta, immediately above each cusp; the three sinuses include the posterior (non-coronary sinus), and the right and left aortic sinuses (from which the left and right coronary arteries arise) csmith abnormal Petit sinus morphology 2010-09-30T10:52:58Z abnormal sinus of Valsalva morphology MPheno.ontology abnormal Valsalva sinus morphology MP:0010482 abnormal aorta bulb morphology