The Journal of thoracic and cardiovascular surgery
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J. Thorac. Cardiovasc. Surg. · Apr 2022
Postoperative and mid-term hemodynamic changes after replacement of the ascending aorta.
To evaluate aortic distensibility and pulse waveform patterns associated with the ascending aortic aneurysm, and to analyze the postoperative and mid-term hemodynamic changes induced by prosthetic replacement of the ascending aorta. ⋯ This study does not confirm the assumption that substitution of the viscoelastic ascending aorta with a rigid prosthesis can cause serious hemodynamic alterations downstream, because we did not observe a worsening of global aortic distensibility after insertion of a rigid prosthetic aorta. The ascending aortic aneurysm is associated with a pulsus tardus.
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J. Thorac. Cardiovasc. Surg. · Apr 2022
Predicting benign, preinvasive, and invasive lung nodules on computed tomography scans using machine learning.
The study objective was to investigate if machine learning algorithms can predict whether a lung nodule is benign, adenocarcinoma, or its preinvasive subtype from computed tomography images alone. ⋯ The machine learning algorithms demonstrated reasonable performance in differentiating benign versus preinvasive versus invasive adenocarcinoma from computed tomography images alone. However, the prediction accuracy varies across its subtypes. This holds the potential for improved diagnostic capabilities with less-invasive means.
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J. Thorac. Cardiovasc. Surg. · Apr 2022
American Association for Thoracic Surgery Summer Intern Scholarship-Over a decade of experience.
The study objective was to evaluate the experience of previous American Association for Thoracic Surgery Summer Intern Scholarship recipients. ⋯ The awardees of the American Association for Thoracic Surgery Summer Intern Scholarship come from a variety of medical schools and visited a diverse group of sponsoring institutions. The 8-week program provides valuable early exposure for medical students to cardiothoracic surgeons, the operating room, and research opportunities. This experience was highly recommended by prior recipients to medical students interested in cardiothoracic surgery.
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J. Thorac. Cardiovasc. Surg. · Apr 2022
Influence of right ventricular pressure and volume overload on right and left ventricular diastolic function.
Ventricular interdependence may account for altered ventricular mechanics in congenital heart disease. The present study aimed to identify differences in load-dependent right ventricular (RV)-left ventricular (LV) interactions in porcine models of pulmonary stenosis (PS) and pulmonary insufficiency (PI) by invasive admittance-derived hemodynamics in conjunction with noninvasive cardiovascular magnetic resonance (CMR). ⋯ The LV exhibits systolic dysfunction and noncompliance with PI. PS is associated with preserved LV systolic function and evidence of some LV diastolic dysfunction. Interventricular interactions influence LV filling and likely account for differential effects of RV pressure and volume overload on LV function.