The Journal of thoracic and cardiovascular surgery
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J. Thorac. Cardiovasc. Surg. · Dec 2024
Comparative StudyLongitudinal Versus Circumferential Biomechanical Behavior of the Aneurysmal Ascending Aorta.
We evaluate the independent effects of patient and aortic tissue characteristics on biaxial physiologic mechanical metrics in aneurysmal and nonaneurysmal tissues, and uniaxial failure metrics in aneurysmal tissue, comparing longitudinal and circumferential behavior. ⋯ Age was the strongest predictor of mechanical behavior. After adjusting for age, nonaneurysmal tissue was less deformable than aneurysmal tissue. Differences in longitudinal and circumferential mechanics contribute to tissue dysfunction and failure in ascending aneurysms. This highlights the need to better understand the effects of age, ascending aortic length, and thickness on clinical aortic behavior.
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J. Thorac. Cardiovasc. Surg. · Dec 2024
Efficacy and Safety of a Transaortic Approach to Midventricular and Apical Septal Myectomy.
The study objective was to evaluate the safety and efficacy of a transaortic approach to midventricular and apical septal myectomy in patients with hypertrophic cardiomyopathy with left ventricular outflow tract or midventricular obstruction. ⋯ Most patients undergoing septal myectomy for relief of obstruction required resection beyond the basal septum. With specialized instrumentation, detailed imaging and knowledge of variable septal anatomy, resecting midventricular and apical septal muscle can be safely and effectively achieved through a transaortic approach.