397 research outputs found
RELATIONSHIP BETWEEN CLINICAL FEATURES AND THE DIAGNOSTIC VALUE OF CARDIOVASCULAR MAGNETIC RESONANCE TISSUE CHARACTERIZATION IN PATIENTS WITH CLINICALLY SUSPECTED MYOCARDITIS
The value of cardiac magnetic resonance in the prediction of left ventricular function improvement following acute myocarditis
Motives for (not) participating in a lifestyle intervention trial
This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens
The effect of inhibition of the Na+/H+ exchanger on the development of hypertrophy in hypertrophic cardiomyopathy
Comparison and reproducibility of standard and high temporal resolution myocardial tissue tagging in patients with severe aortic stenosis
Objectives
The aim of this study was to compare and assess the reproducibility of left ventricular (LV) circumferential peak systolic strain (PeakEcc) and strain rate (SR) measurements using standard and high temporal resolution myocardial tissue tagging in patients with severe aortic stenosis (AS).
Background
Myocardial tissue tagging with cardiac magnetic resonance (CMR) can be used to quantify strain and SR, however, there are little data on the reproducibility. Diastolic SR may be of particular interest as it may be the most sensitive marker of diastolic dysfunction often occurring early in the course of disease.
Methods
Eight patients with isolated severe AS without obstructive coronary artery disease were prospectively enrolled. They underwent CMR in a 1.5T scanner (Siemens Avanto) on two separate occasions, median interval 12 days. Complementary tagged (CSPAMM) images were acquired with both a single breath-hold (SBH: temporal resolution 42ms), and a multiple brief expiration breath-hold (MBH: high temporal resolution 17ms) sequence. Mid-wall PeakEcc was measured in the LV at mid-ventricular level with HARP Version 2.7 (Diagnosoft, USA). SR was calculated from the strain data; SR=Ecc2-Ecc1/Time2-Time1. PeakEcc , peak systolic and diastolic SR were read from curves of strain and SR against time. The MBH SR curves were filtered with a moving average (MA) to reduce noise sensitivity, results from a sample width of three and five were examined. Differences between SBH and MBH were assessed using Wilcoxon signed-rank test as not all measures were normally distributed. Reproducibility assessments were carried out on all techniques.
Results
PeakEcc was significantly higher with MBH vs. SBH, but reproducibility was slightly worse. Results are summarised in Table 1. Systolic SR was approximately equal with all techniques although MBH using MA of five led to a borderline significant reduction. Diastolic SR was higher when measured with MBH although only significant using MA of three. Systolic and diastolic SR measures were more reproducible with MBH compared with SBH, except for the diastolic SR using MA of three, which was substantially worse. Strain and SR curves for the same patient are shown in Figure 1
EFFECT OF CARDIAC HYBRID 150-WATER PET/CT IMAGING UPON DOWNSTREAM REFERRAL FOR INVASIVE CORONARY ANGIOGRAPHY AND REVASCULARIZATION RATE
Combined anatomical and functional diagnostic work-up of patients with suspected coronary artery disease using cardiac computed tomography and magnetic resonance imaging
Impaired myocardial perfusion on CMR is associated with increased numbers of classical monocytes in STEMI patients treated by primary PCI
Разработка прожектора железнодорожного вокзала Томск-1
Основная задача наружного освещения на железных дорогах состоит в том, чтобы дать возможность персоналу и пассажиру определять:
- пространственное расположение и состояние движения подвижного состава;
- обеспечение беспрепятственного выполнения работы;
- препятствия, мешающие безопасному движению;
- железнодорожные сигналы;
- безопасность работы персонала и нахождения пассажиров в зоне железной дороги.
Железная дорога является зоной повышенной опасности, поэтому нет ничего удивительного, что железнодорожное освещение строго нормируется стандартами. Железнодорожные пути, станции и другие объекты нужно освещать на протяжении всей ночи, поэтому оборудование должно быть надежным и экономным.The main task of outdoor lighting on the railways is to enable the personnel and the passenger to determine:
- Spatial location and state of movement of rolling stock;
- ensuring unhindered performance of work;
- obstacles to safe traffic;
- railway signals;
- safety of personnel and the presence of passengers in the railway zone.
The railway is a zone of increased danger, so it is not surprising that railway lighting is strictly standardized by standards. Railway tracks, stations and other objects need to be illuminated throughout the night, so the equipment must be reliable and economical
TCT-290 Assessment Of Myocardial Viability After Acute Myocardial Infarction: A Head-To-Head Comparison Of The Perfusable Tissue Index By PET And Delayed Contrast-Enhanced CMR
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