1. Articles from H. Bedanova

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    1. Assessment of Cardiac Allograft Vasculopathy from OCT Images: Automated Analysis is as Good as Expert-Guided Approach

      Assessment of Cardiac Allograft Vasculopathy from OCT Images: Automated Analysis is as Good as Expert-Guided Approach

      Purpose Cardiac Allograft Vasculopathy (CAV) is a frequent complication after heart transplantation (HTx). To help identify patients at risk of CAV, 3D quantitative analysis of coronary wall thickening is of major importance. Until now, substantial manual tracing effort was required. We report a fully automated approach using optical coherence tomography (OCT) imaging. Methods Lumen surface, intimal and medial layers were identified using our LOGISMOS segmentation framework. Coronary wall regions with layered appearance were automatically identified in each OCT frame using deep learning. These segmentation and classification approaches were newly combined in one fully automated system. The comparison between fully automated ...

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    2. Effect of Heart Rate on Early Progression of Cardiac Allograft Vasculopathy: A Prospective Study Using Highly Automated 3-D Optical Coherence Tomography Analysis

      Effect of Heart Rate on Early Progression of Cardiac Allograft Vasculopathy: A Prospective Study Using Highly Automated 3-D Optical Coherence Tomography Analysis

      Purpose Despite the controversial effect of elevated heart rate on progression of cardiac allograft vasculopathy (CAV), heart-rate-slowing agents are frequently prescribed with the assumption that higher heart rate predicts worse outcomes in cardiovascular disease. Methods This prospective 2-center trial investigated progression of CAV in 116 heart transplant (HTx) patients. Both baseline (1 month after HTx) and follow-up (12 months after HTx) examinations by coronary optical coherence tomography (OCT) were analyzed using highly automated 3D graph-based segmentation software. Mean heart rate was assessed by 24-hour ambulatory ECG monitoring at baseline and at 12-month follow-ups after HTx. Results During the first post-transplant ...

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