Results 91 to 100 of about 7,318 (202)

Echocardiographic and hemodynamic determinants of right coronary artery flow reserve and phasic flow pattern in advanced non-ischemic cardiomyopathy

Cardiovascular Ultrasound, 2007
Background In patients with advanced non-ischemic cardiomyopathy (NIC), right-sided cardiac disturbances has prognostic implications. Right coronary artery (RCA) flow pattern and flow reserve (CFR) are not well known in this setting.
Mady Charles, Meneghetti Claudio, Beck Leonardo, Perin Marco, Ribeiro Expedito, Ianni Barbara, Graziosi Pedro, Filho Eulogio, Ramires Jose AF   +8 more
doaj   +1 more source

Contour and Centreline Tracking of Vessels from Angiograms using the Classical Image Processing Techniques [PDF]

Buletinul Institutului Politehnic din Iasi, Sectia Automatica si Calculatoare, Vol. 62(66), No. 3, pp. 49-60, July 2016, ISSN 1220-2169, 2017
This article deals with the problem of vessel edge and centerline detection using classical image processing techniques due to their simpleness and easiness to be implemented. The method is divided into four steps: the vessel enhancement which implies a non-linear filtering proposed by Frangi, the thresholding using Otsu method and the contour ...
arxiv  

Bedside ultrasound to assess acute central venous pressure change during treatment of decompensated heart failure

International Journal of Cardiology: Heart & Vasculature, 2022
Background: Accurate volume status assessment is crucial for the treatment of acute decompensated heart failure (ADHF). Volume status assessment by physical exam is often inaccurate, necessitating invasive measurement with right heart catheterization ...
Shumail Fatima, William Lambert, Mehdi Nouraie, John Pacella   +3 more
doaj  

Improving Catheter Segmentation & Localization in 3D Cardiac Ultrasound Using Direction-Fused FCN [PDF]

arXiv, 2019
Fast and accurate catheter detection in cardiac catheterization using harmless 3D ultrasound (US) can improve the efficiency and outcome of the intervention. However, the low image quality of US requires extra training for sonographers to localize the catheter.
arxiv  

Weakly-Supervised Learning via Multi-Lateral Decoder Branching for Tool Segmentation in Robot-Assisted Cardiovascular Catheterization [PDF]

arXiv
Robot-assisted catheterization has garnered a good attention for its potentials in treating cardiovascular diseases. However, advancing surgeon-robot collaboration still requires further research, particularly on task-specific automation. For instance, automated tool segmentation can assist surgeons in visualizing and tracking of endovascular tools ...
arxiv  

Autonomous Catheterization with Open-source Simulator and Expert Trajectory [PDF]

arXiv
Endovascular robots have been actively developed in both academia and industry. However, progress toward autonomous catheterization is often hampered by the widespread use of closed-source simulators and physical phantoms. Additionally, the acquisition of large-scale datasets for training machine learning algorithms with endovascular robots is usually ...
arxiv  

Incidence of pulmonary hypertension in COPD and its relation to inflammatory marker interleukin-1

The Egyptian Journal of Bronchology
Background Many COPD patients present with severe PH defined by a pulmonary vascular resistance (PVR) > 5 WU as measured by right heart catheterization (RHC), and inflammation is thought to be contributing strongly to pulmonary vascular remodeling in ...
Sherif Ahmed Eissa, Youssef Mohamed Amin Soliman, Tarek Samy Essawy, Mostafa Mohammed Abdelrahman Elsayed, Nashwa Ahmed Amin   +4 more
doaj   +1 more source

CathAction: A Benchmark for Endovascular Intervention Understanding [PDF]

arXiv
Real-time visual feedback from catheterization analysis is crucial for enhancing surgical safety and efficiency during endovascular interventions. However, existing datasets are often limited to specific tasks, small scale, and lack the comprehensive annotations necessary for broader endovascular intervention understanding. To tackle these limitations,
arxiv  

Comparative analysis of hemodynamic monitoring with pulmonary artery catheter and transthoracic echocardiography in patients with cardiogenic shock

Российский кардиологический журнал
Aim. To compare main central hemodynamic parameters obtained by pulmonary artery catheterization and transthoracic echocardiography (TTE).Material and methods.
V. V. Ryabov, A. G. Syrkina, M. A. Kercheva, I. I. Yolgin, O. O. Panteleev   +4 more
doaj   +1 more source

A Master-Follower Teleoperation System for Robotic Catheterization: Design, Characterization, and Tracking Control [PDF]

arXiv
Minimally invasive robotic surgery has gained significant attention over the past two decades. Telerobotic systems, combined with robot-mediated minimally invasive techniques, have enabled surgeons and clinicians to mitigate radiation exposure for medical staff and extend medical services to remote and hard-to-reach areas.
arxiv