Filtered By:
Source: The International Journal of Cardiovascular Imaging
This page shows you your search results in order of relevance. This is page number 7.
Order by Relevance | Date
Total 142 results found since Jan 2013.
Left atrial enlargement as a maker of significant high-risk patent foramen ovale
AbstractLeft atrial (LA) enlargement is a marker of LA cardiopathy and, in patients with patent foramen ovale (PFO), is associated with an increased risk of ischemic stroke. The primary study outcome was the comparison of LA diameter between patients undergoing percutaneous PFO closure versus those treated conservatively. The secondary endpoints were the association of LA diameter with the Risk of Paradoxical Emboli (ROPE) score and the presence of Atrial septal aneurysm (ASA) and Right-To-Left Shunt (RLS). Retrospective analysis of clinical and instrumental data of 1040 subjects referred to a single tertiary center for PF...
Source: The International Journal of Cardiovascular Imaging - July 18, 2019 Category: Radiology Source Type: research
Utility of left atrial strain for predicting atrial fibrillation following ischemic stroke
AbstractTwenty-five percent of ischemic strokes (IS) are cryptogenic, but it is estimated that paroxysmal atrial fibrillation (PAF) is the underlying cause in up to a third of cases. We aimed to investigate the predictive value of speckle tracking of the left atrium (LA) in diagnosing PAF in IS patients. We retrospectively studied 186 IS patients with a clinical echocardiographic examination during sinus rhythm. Outcome was PAF defined by at least one reported episode of AF following their IS. Conventional echocardiographic measures were performed. Global longitudinal strain (GLS), LA reservoir-( εs), conduit-( εe), cont...
Source: The International Journal of Cardiovascular Imaging - August 20, 2019 Category: Radiology Source Type: research
Relationship between left atrial strain, diastolic dysfunction and subclinical atrial fibrillation in patients with cryptogenic stroke: the SURPRISE echo substudy
In conclusion, LAs associates with PAF independent of GLS and LA size, and may be used to improve the performance of DDF grading for identifying PAF in CS patients.
Source: The International Journal of Cardiovascular Imaging - October 7, 2019 Category: Radiology Source Type: research
4D flow vs. 2D cardiac MRI for the evaluation of pulmonary regurgitation and ventricular volume in repaired tetralogy of Fallot: a retrospective case control study
AbstractLengthy exams and breath-holding limit the use of pediatric cardiac MRI (CMR). 3D time-resolved flow MRI (4DF) is a free-breathing, single-sequence exam that obtains magnitude (anatomic) and phase contrast (PC) data. We compare the accuracy of gadobenate dimeglumine-enhanced 4DF on a 1.5 T magnet to 2D CMR in children with repaired tetralogy of Fallot (rTOF) to measure pulmonary net flow (PNF) as a reflection of pulmonary regurgitation, forward flow (FF) and ventricular volumetry. Thirty-four consecutive cases were included. 2D PCs were obtained at the valve level. Using 4DF, we m easured PNF at the valve and at ...
Source: The International Journal of Cardiovascular Imaging - December 31, 2019 Category: Radiology Source Type: research
Left ventricular mechanical dispersion in flow-gradient patterns of severe aortic stenosis with narrow QRS complex
AbstractPatients with severe aortic stenosis are classified according to flow-gradient patterns. We investigated whether left ventricular (LV) mechanical dispersion, a marker of dyssynchrony and predictor of mortality, is associated with low-flow status in aortic stenosis. 316 consecutive patients with aortic stenosis and QRS duration < 120 ms were included in the retrospective analysis. Patients with severe aortic stenosis (aortic valve area ≤ 1.0 cm2) were classified as normal-flow (NF; stroke volume index > 35 ml/m2) high-gradient (HG; mean transvalvular gradient ≥ 40 mmHg) (n = 79...
Source: The International Journal of Cardiovascular Imaging - January 12, 2020 Category: Radiology Source Type: research
Effects of baseline heart rate at sea level on cardiac responses to high-altitude exposure
AbstractHigh-altitude (HA) exposure has been widely considered as a cardiac stress, and associated with altered cardiac function. However, the characteristics of cardiac responses to HA exposure are unclear. In total, 240 healthy men were enrolled and ascended to 4100 m by bus within 7 days. Standard echocardiography and color tissue Doppler imaging were performed at sea level and at 4100 m. In all subjects, HA exposure increased HR [65 (59, 71) vs. 72 (63, 80) beats/min, p < 0.001] but decreased the stroke volume index (SVi) [35.5 (30.5, 42.3) vs. 32.9 (27.4, 39.5) ml/m2, p < 0.001], leading to an unc...
Source: The International Journal of Cardiovascular Imaging - January 16, 2020 Category: Radiology Source Type: research
High-resolution MRI assessed carotid atherosclerotic plaque characteristics comparing men and women with elevated ApoB levels
AbstractPrevious studies demonstrated that men were more likely to have plaque rupture and are at greater risk for myocardial infarction and stroke than women. We evaluated differences in carotid plaque characteristics by MRI between men and women with mild-moderate atherosclerosis and elevated ApoB levels. One hundred eighty-two subjects (104 men and 78 women) with CAD or carotid stenosis ( ≥ 15% by ultrasound), ApoB ≥ 120 mg/dL and carotid MRI scan were included. Percent wall volume (%WV) was calculated as (wall volume/total vessel volume) × 100%. Three major plaque compositions, fibrous tissue (FT), calc...
Source: The International Journal of Cardiovascular Imaging - February 3, 2020 Category: Radiology Source Type: research
Evaluating cervical artery dissections in young adults: a comparison study between high-resolution MRI and CT angiography
This study supports the value of HR-MRI in non-invasive diagnosis of young adults with cervical artery dissections.
Source: The International Journal of Cardiovascular Imaging - February 19, 2020 Category: Radiology Source Type: research
Comparison of direct stenting with conventional strategy on myocardial impairments in ST-segment elevation myocardial infarction: a cardiac magnetic resonance imaging study
AbstractDirect stenting (DS) without pre-dilatation of the culprit lesion might improve myocardial perfusion and prognosis in patients undergoing percutaneous coronary intervention for ST-elevation myocardial infarction (STEMI); however, some studies report conflicting results. We investigated whether DS provides incremental myocardial benefits over conventional stenting (CS) in STEMI patients based on cardiac magnetic resonance imaging (CMR) measures. Reperfused patients who underwent CMR examinations within 1 week of STEMI onset were selected from a multicenter CMR registry of STEMI (NCT: 03768453). Patients were strat...
Source: The International Journal of Cardiovascular Imaging - March 11, 2020 Category: Radiology Source Type: research
Caseous Mitral Annular Calcification (CMAC) in an octogenarian with Calcific LV Aneurysm
AbstractCaseous Mitral Annular Calcification (CMAC) is seen in 0.6% of Mitral annular Calcification (MAC) and carries an increased risk for ischemic stroke. The typical location is Posterior Mitral Annular area and arises as degeneration of MAC. Typical Echocardiographic features along with Cardiac MRI and CT imaging features are diagnostic.
Source: The International Journal of Cardiovascular Imaging - March 29, 2020 Category: Radiology Source Type: research
Early diastolic strain rate by two-dimensional speckle tracking echocardiography is a predictor of coronary artery disease and cardiovascular events in stable angina pectoris
This study aimed to clarify the diagnostic and prognostic potential of strain rate in patients with suspected stable angina pectoris (SAP). Strain rate by 2-dimensional speckle tracking echocardiography (2DSTE) has been suggested to be able to diagnose coronary artery disease (CAD) and predict cardiovascular events in various patient groups. Prospectively enrolled patients (n = 296) with suspected SAP, no previous cardiac disease, and normal left ventricular ejection fraction were examined by 2DSTE, exercise ECG, and coronary angiography. Obstructive CAD was defined as stenosis ≥ 70% in ≥ 1 coronary artery...
Source: The International Journal of Cardiovascular Imaging - May 13, 2020 Category: Radiology Source Type: research
Defining the left ventricular base in mitral valve prolapse: impact on systolic function and regurgitation
AbstractIn bileaflet mitral valve prolapse (BMVP) systolic leaflet displacement creates a pocket of blood on the left ventricular (LV) side of the leaflets, but on the atrial side of the annulus. This blood is excluded from the LV end-systolic volume if the mitral valve annulus is used to determine the most basal extent of the LV. The purpose of this study is to describe the quantitative implications of defining the LV base on mitral regurgitant severity and LV systolic function in BMVP. In 30 consecutive patients (53% male, 58 ± 14 years) with BMVP, LV endocardial and epicardial borders were determined from SSFP im...
Source: The International Journal of Cardiovascular Imaging - July 5, 2020 Category: Radiology Source Type: research
Fully automated quantification of left ventricular volumes and function in cardiac MRI: clinical evaluation of a deep learning-based algorithm
AbstractTo investigate the performance of a deep learning-based algorithm for fully automated quantification of left ventricular (LV) volumes and function in cardiac MRI. We retrospectively analysed MR examinations of 50 patients (74% men, median age 57 years). The most common indications were known or suspected ischemic heart disease, cardiomyopathies or myocarditis. Fully automated analysis of LV volumes and function was performed using a deep learning-based algorithm. The analysis was subsequently corrected by a senior cardiovascular radiologi st. Manual volumetric analysis was performed by two radiology trainees. Vol...
Source: The International Journal of Cardiovascular Imaging - July 15, 2020 Category: Radiology Source Type: research
Accuracy and sensitivity of three-dimensional echocardiography to detect changes in right ventricular volumes: comparison study with cardiac magnetic resonance
AbstractWe aimed to investigate the ability of three-dimensional transthoracic echocardiography (3DE) to detect changes in RV volumes compared to cardiac magnetic resonance (CMR). Eighty-five subjects including 45 with no known cardiac disease and 40 patients with a variety of cardiac diseases were included. Two- and three-dimensional echocardiography as well as CMR of the RV was performed before and after infusion of on average two litres of saline. Examinations were analysed with estimation of RV dimensions, volumes and ejection fraction (RVEF). Intra- and inter-examiner variability was evaluated in 25 patients rand...
Source: The International Journal of Cardiovascular Imaging - September 9, 2020 Category: Radiology Source Type: research
Effect of long term CPAP therapy on cardiac parameters assessed with cardiac MRI
AbstractThe obstructive sleep apnoea syndrome (OSAS) is a disorder with a high prevalence and is associated with an elevated cardiovascular risk and increased morbidity and mortality. For longitudinal studies and functional analysis cardiac MRI is regarded as the gold standard. Aim of this study was to evaluate the long-term effect of continuous positive airway pressure (CPAP) therapy on cardiac functional parameters with cardiac Magnetic Resonance Imaging (cMRI). 54 patients with OSAS (mean apnea hypopnea index-AHI: 31) were prospectively enrolled in this study and cMRI was performed before and after 7 months of CPAP th...
Source: The International Journal of Cardiovascular Imaging - September 13, 2020 Category: Radiology Source Type: research
