Progress in CardiologyAssessment of diastolic function by cardiovascular magnetic resonance☆,☆☆
Section snippets
Functional CMR
A number of CMR techniques are currently available: gradient echo (GRE) for evaluation of functional dimensions, phase contrast to measure flow, and myocardial tagging to assess regional dynamics. Each has its own characteristics and specific advantages for assessing diastolic function.
The greatest challenges in the acquisition of CMR movies or cine display have been cardiac motion from breathing and flow artifacts from myocardial and blood motion.6 GRE uses repetitive radiofrequency pulses
Evaluation of diastolic function using CMR: Applications in cardiac disease
This section reviews the role of CMR in estimating cardiac diastolic function in hypertrophic cardiomyopathy, systemic hypertension, aortic valve stenosis, coronary artery disease, and congenital heart disease (Table II).Type of disease CMR technique Patients (n) Principal findings HCM29 GRE 31 Impairment of regional relaxation HCM31 Spectroscopy 8 Decreased PCr/ATP in symptomatic patients HCM32 Spectroscopy 8 Decreased PCr/ATP in asymptomatic patients
Practical considerations
The most optimal cardiac images can be obtained through use of a dedicated surface coil. Compensation for cardiac motion can be performed by synchronization of the CMR acquisition with the ECG signal. In the past, triggering to the ECG sometimes proved to be difficult because of interference of the ECG signal with the magnetic resonance system. Recently, these practical problems could be avoided by use of the vector ECG. Compensation for respiratory motion can be performed by breath-holding or
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Left ventricular structure and diastolic function by cardiac magnetic resonance imaging in hypertrophic cardiomyopathy
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Applications of cardiac magnetic resonance imaging in sickle cell disease
2017, Blood Cells, Molecules, and DiseasesCitation Excerpt :CMR spectroscopy has the ability to analyze and measure the ratio of myocardial phosphocreatine and adenosine triphosphate levels that are determined by cardiac workload and reflects the energy status of myocardial tissues. Impaired left ventricular diastolic function is associated with alterations in myocardial phosphate metabolism and can be identified using CMR spectroscopy [33]. However, CMR spectroscopy is technically challenging and requires extensive experience which has limited its clinical use and availability.
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2016, International Journal of CardiologyCitation Excerpt :If required, the built-in semiautomatic procedure for contour detection of the endocardium on LV short-axis views was corrected manually. Beside this volume versus time curve (V/Δt), also its first derivate characterizing the rate of LV volume changes versus time (ΔV/Δt) was assessed (Fig. 1) [15,16]. Thereby, peak ejection rate (PER, normalized to LVEDV), peak ejection time (PET), peak filling rate (PFR, normalized to LVEDV) and peak filling time after end systole (PFT) was assessed by using approved analyzing software (Argus, Siemens, Germany) [17,18].
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Reprint requests: Bernard P. Paelinck, MD, University Hospital Antwerp, Department of Cardiology, Wilrijkstraat 10, 2650 Edegem, Belgium.
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E-mail: [email protected]