Publications by authors named "Y Yam"
Background: The assessment of left ventricular (LV) systolic function and quantification of LV ejection fraction (EF) in patients with atrial fibrillation (AF) can be difficult. We previously demonstrated that LV volume changes over the 100 ms of systole (LVEF) can be used as a measure of LV systolic function.
Objective: We sought to evaluate the applicability of LVEF in AF patients.
Racial referral bias in cardiac computed tomography: Differences, disparities or discrimination?
J Cardiovasc Comput Tomogr
October 2024
Background: Disparities exist in medicine and can affect patient care. We sought to understand influences of racial biases in diagnostic testing within a Cardiac CT (CCT) population.
Methods: Race of CCT patients, referring physicians and the population in the catchment area were captured between February 2006 and November 2021.
Background: Prospective ECG-triggered cardiac computed tomography (CT) imaging limits the ability to assess left ventricular (LV) ejection fraction (EF). We previously developed a new index derived from LV volume changes over 100 ms during systole (LVEF) as a surrogate of LV function in patients undergoing prospective ECG-triggered cardiac CT. We sought to evaluate the prognostic value of LVEF.
View Article and Find Full Text PDFPre-screening for non-diagnostic coronary computed tomography angiography.
Eur Heart J Imaging Methods Pract
September 2023
Article Synopsis
- Researchers aimed to create a clinical tool that predicts the chances of a non-diagnostic coronary computed tomography angiography (CCTA) test to avoid unnecessary referrals and delays in diagnosis.
- They used data from over 21,000 patients who underwent CCTA between 2006 and 2021 to develop a scoring system, employing logistic regression and machine learning methods to assess the likelihood of obtaining a non-diagnostic result.
- The model, which identified key factors like having a cardiac implant and weighing over 100 kg as significant predictors, could be used during the scheduling process to suggest more suitable diagnostic tests for patients.