Publications by authors named "Kenneth L Rhoads"
Article Synopsis
- - Aortic stiffness, which increases with age, may lead to adverse changes in the heart's left ventricle (LV) size after a heart attack (myocardial infarction).
- - Older patients (60+) showed poorer heart function with lower ejection fractions and larger end-systolic volumes compared to younger patients, despite similar heart attack sizes.
- - The study suggests that higher aortic stiffness in older patients is linked to larger LV size and worse heart function post-heart attack, indicating that age-related changes in arterial elasticity affect heart remodeling.
Purpose: To investigate the long-term safety of cardiac magnetic resonance imaging (CMR) performed one to seven days after coronary artery stent (bare metal) implantation.
Materials And Methods: We analyzed 119 consecutive patients with acute myocardial infarction (MI) who underwent emergency coronary stent implantation with a bare-metal stent. CMR using a 1.
Objectives: This study was designed to determine the diagnostic value of adenosine cardiac magnetic resonance (CMR) in troponin-negative patients with chest pain.
Background: We hypothesized that adenosine CMR could determine which troponin-negative patients with chest pain in an emergency department have coronary artery disease (CAD) or future adverse cardiac events.
Methods: Adenosine stress CMR was performed on 135 patients who presented to the emergency department with chest pain and had acute myocardial infarction (MI) excluded by troponin-I.
Article Synopsis
- The study aimed to compare fully quantitative and semiquantitative methods for analyzing myocardial blood flow (MBF) and myocardial perfusion reserve (MPR) through a specific MRI technique.
- Ten healthy participants underwent stress and rest imaging using a dual-bolus gadolinium protocol, with data processed to obtain accurate MBF and MPR measurements.
- Results showed that fully quantitative methods provided significantly higher and more reliable MPR values than semiquantitative methods, which underestimated perfusion reserve and failed to differentiate between rest and stress levels effectively.
Purpose: The purpose of this study was to analyze reproducibility and inter-observer variability of dobutamine stress cardiac magnetic resonance imaging (dobutamine CMR) and its implications on serial studies.
Methods: Nineteen consecutive patients underwent two dobutamine CMR each (median 12 days apart), as part of eligibility criteria for phase I/II stem cell therapy trial. These patients had Canadian Cardiovascular Society Class III/IV angina despite maximal therapy.
Objectives: The current study tested the hypothesis that gadolinium delayed enhancement assessment of infarct size correlates with clinical indices of myocardial infarction (MI) in humans. Acute infarct mass by cardiac magnetic resonance (CMR) was compared with peak troponin I, acute and chronic left ventricular (LV) systolic function, and chronic infarct mass in patients imaged after recent acute MI.
Background: Cardiac magnetic resonance accurately determines myocardial viability in patients with chronic ischemic heart disease but is not well validated for recent MI.
Purpose: Assessment of left ventricular function is important in patients with heart disease. We hypothesized that regional wall motion assessed qualitatively by cine magnetic resonance imaging (MRI) can predict the left ventricular ejection fraction (EF).
Methods: The correlations between MRI EF and the American Society of Echocardiography (ASE) score index and a modified ASE score index were established in 117 subjects.