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  • Measurement
  • In patients with reduced LV function, all volume and mass measurements were again similar for SSFP sequences at 1.5 vs. 3 T. In volunteers and patients, measurement variabilities for LV parameters were small for both field strength and sequences, ranging between 3.7% and 10.7% for mass. (ox.ac.uk)
  • sequences
  • Determination of cardiac volumes and mass with FLASH and SSFP cine sequences at 1.5 vs. 3 Tesla: a validation study. (ox.ac.uk)
  • CONCLUSION: Compared to 1.5 T, cardiac cine MR imaging at 3 T, using either FLASH or SSFP sequences, is feasible and highly reproducible. (ox.ac.uk)
  • determination
  • PURPOSE: To compare cardiac cine MR imaging using steady state free precession (SSFP) and fast low angle shot (FLASH) techniques at 1.5 and 3 T, and to establish their variabilities and reproducibilities for cardiac volume and mass determination in volunteers. (ox.ac.uk)
  • field
  • Field strength does not have an influence on quantification of cardiac volume or mass, but the systematic overestimation of LV mass and underestimation of LV volume by FLASH compared to SSFP is present at both 1.5 and 3 T. Normal values for cardiac volumes and mass established at 1.5 T can be applied to scans obtained at 3 T. (ox.ac.uk)
  • chamber volume or pressure
  • This invention relates generally to a cardiac pacing system in which the pacing rate tracks metabolic need, and more particularly to a rate adaptive pacemaker employing a sensor for detecting variations in cardiac chamber volume or pressure due to respiration and producing a control signal related to the respiration frequency and depth for adjusting the pacing rate relative to a baseline value. (google.com)
  • clinical
  • Most clinical applications tend to focus upon a particular set of organ structures, and in the case of cardiac imaging, it would be helpful to embed anatomical features into the dynamic volume that are of particular importance to an intervention. (spie.org)
  • aortic
  • Differential regulation of cardiac protein kinase C isozyme expression after aortic banding in rat. (semanticscholar.org)
  • Using transthoracic ultrasound Doppler at the level of the aortic valve, we compared blood flow velocities in the left ventricle and cardiac frequencies during rest and at 1, 3 and 4 min after a bout of exercise in 13 adult bottlenose dolphins ( Tursiops truncatus , six male and seven female, body mass range 143-212 kg). (biologists.org)
  • adaptive
  • A rate adaptive cardiac pacer is described in which the impedance versus time information derived using impedance plethysmography or the pressure versus time information derived from a pressure transducer in a ventricular chamber is signal processed to recover a modulating envelope due to volume or pressure changes occasioned by respiratory activity. (patents.com)
  • implantable
  • Workers in the cardiac pacing field have long recognized the desirability of creating an implantable device capable of maintaining an adequate heartrate in a patient suffering from bradycardia at a nominal level with the individual at rest but which would automatically adapt to changes in metabolic need to increase the pacing rate above that baseline value. (google.com)
  • Primary Prevention Implantable Cardiac Defibrillator Trials: What Have We Learned? (elsevier.com)
  • function
  • A uniform transfer function (TF), such as is generally employed in volume rendering, cannot effectively isolate such structures because of the lack of spatial information and the small intensity differences between adjacent tissues. (spie.org)
  • Seismocardiography is a method for detecting cardiac function by measuring the vibrations of the sternum. (aalto.fi)
  • measurement
  • The results of phase blood volume measurement and the numerical values that characterize the metabolic processes in heart muscles are given herein. (cardiometry.net)
  • therapy
  • Dynamic volume rendering of the beating heart is an important element in cardiac disease diagnosis and therapy planning, providing the clinician with insight into the internal cardiac structure and functional behavior. (spie.org)
  • respectively
  • The mask tag labels derived from segmentation are first smoothed with a Gaussian filter, and multiple TFs are designed for each of the MVs and the source cardiac volume respectively, mapping the voxel's intensity to color and opacity at each sampling point along the casting ray. (spie.org)
  • One minute following high intensity exercise, the cardiac variables had increased by 104±43%, 63±11% and 234±84%, respectively. (biologists.org)
  • cardiology
  • In many types of cardiology procedures, there is an association between higher institutional volume and improved outcomes. (chop.edu)
  • influence
  • Field strength does not have an influence on quantification of cardiac volume or mass, but the systematic overestimation of LV mass and underestimation of LV volume by FLASH compared to SSFP is present at both 1.5 and 3 T. Normal values for cardiac volumes and mass established at 1.5 T can be applied to scans obtained at 3 T. (ox.ac.uk)
  • artifacts
  • Our algorithm produces high image quality in real-time without introducing intermixing artifacts in the rendered 4-dimensional (4D) cardiac volumes. (spie.org)
  • factors
  • However, after adjusting for patient- and procedure-level factors, there was no significant association between center volume and outcome. (chop.edu)
  • Study
  • The study team identified all congenital cardiac catheterizations from 2011 to 2013 at 64 institutions in the IMPACT (Improving Pediatric and Adult Congenital Treatment) Registry. (chop.edu)
  • blood
  • A significant correlation was found between total blood volume (TBV) and EDV before (r = 0.66, p less than 0.005) and after dialysis (r = 0.61, p less than 0.001). (ahajournals.org)
  • The Monroe-Kelley doctrine states that the volume of the craniospinal compartment which comprises blood, cerebrospinal fluid, and brain parenchyma remains constant. (alpfmedical.info)
  • relationship
  • Andrew C. Glatz, MD , and colleagues investigated whether such a relationship occurs in congenital cardiac catheterization. (chop.edu)