Normal aortic arch diameter8/2/2023 ![]() There are three main dynamic mechanical factors that contribute to stress in the ascending aorta: arterial blood pressure, the characteristics of the blood flow and systolic up-and-down movement of the aorta (systolic aortic stretching – SAS) during the heart cycle. However, to date, no diagnostic examinations have been used to measure the longitudinal stiffness of the wall of the ascending aorta. The circumferential stress that is predominantly caused by blood pressure can be assessed through measuring the aortic distensibility and pulse wave velocity. ![]() A new diagnostic tool is necessary to select patients who are at risk of dissection and thus require more aggressive treatment among those whose aortas are moderately dilated.Īortic wall stiffness is a factor that is believed to contribute to a higher risk of dissection. However, considering the risk of aortic operations, not all patients with moderately dilated aortas should undergo this type of surgery. People who are genetically predisposed to aortic dissection can be offered preventive surgery at an early stage. ![]() Hence, patients with moderately dilated aortas are also at risk of aortic dissection. The dissection led to a significant increase in the vessel diameter up to 50–60 mm. On the other hand, a recently published multicenter study proved that most aortas had a diameter roughly 40 mm shortly before dissection. It is believed that the risk of aortic dissection rapidly increases when the diameter of the vessel exceeds 50–60 mm. Other risk factors such as a family history of aortic dissection, genetic disorders and severe uncontrollable hypertension also are used to assess the risk of aortic complications. The maximum diameter and the rapid growth of the aortic dimensions are the main factors considered when qualifying patients for surgery. It is lower in patients with an aortic valve pathology. Conclusions: Systolic aortic stretching negatively correlates with the diameter of the tubular ascending aorta and the age of the patients, and does not correlate with the diameter of the aortic root. There was a statistically significant (p < 0.001) difference in the longitudinal aortic stretching values between patients with a normal aortic valve (10.6 ☓.1 mm) and an aortic valve pathology (8.0 ☓.2 mm in all patients with an aortic valve pathology 7.5 ±4.3 mm in isolated aortic stenosis, 8.5 ☒.9 mm in the case of isolated insufficiency, 8.2 ☒.8 mm for valves that were both stenotic and insufficient). There was no significant correlation between the stretching and the dimension of the aortic root (r = –0.11, p = 0.239). The systolic aortic stretching negatively correlated with age (r = –0.49, p < 0.001) and the diameter of the tubular ascending aorta (r = –0.44, p < 0.001). Results: The maximum dimension of the aortic root was on average 34.9 ±4.5 mm and the mean diameter of the ascending aorta was 33.9 ±5.4 mm. The longitudinal systolic stretching of the aorta caused by the contraction of the heart during systole and the maximum dimensions of the aortic root and ascending aorta were measured in all patients. ![]() Material and methods: Aortographies of 122 patients were analyzed. The objective of this study was to assess longitudinal systolic stretching of the aorta and its correlation with the diameters of the ascending aorta and the aortic root. Introduction: Longitudinal stretching of the aorta due to systolic heart motion contributes to the stress in the wall of the ascending aorta.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |