Evaluation of accordance of magnetic resonance volumetric and flow measurements in determining ventricular stroke volume in cardiac patients

Abstract

Flow quantification can be used as a guidance tool, providing accurate and reproducible stroke volumes of both ventricles. Combining both offers a highly accurate tool to gauge ventricular function in a routine clinical setting, increasing workflow speed.

Clinical feasibility of a myocardial signal intensity threshold-based semi-automated cardiac magnetic resonance segmentation method

“…It has been previously shown that flow measurements can be used as an accurate and reproducible tool for ventricular SV evaluation [9,14]. In our study, the threshold-based method showed excellent agreement in SV and CO with the flow reference, while the conventional segmentation method significantly overestimated SV compared to the flow-derived equivalent ( Table 2).…”

“…Aortic flow assessment was used as an independent reference method to measure CO and SV [9]. Aortic flow was measured using QFlow 5.6.32.4 ES (Medis) by automated contour detection involving the aortic root in the through-plane phase contrast image sets.…”

Sex-Specific Pediatric Percentiles for Ventricular Size and Mass as Reference Values for Cardiac MRI

“…In line with Jeltsch et al, 27 there was a very high correlation between volumetric-derived and flow-derived stroke volumes, which allowed simple internal quality control of volumetric data. Comparison between axial and short-axis volumetry demonstrated no relevant differences, as reported by Jauhiainen et al 28 and in contrast to Alfakih et al, who found short-axis volumes of the right ventricle to be larger in adult volunteers.…”

Centile Curves for Velocity-Time Integral Times Heart Rate as a Function of Ventricular Length: The Use of Minute Distance Is Advantageous to Enhance Clinical Reliability in Children

“…Cardiac magnetic resonance can involve phase contrast, which is currently regarded as the gold standard to measure flow and CO, but it is not commonly available; moreover, it is rather expensive and time intensive, and it requires sedation or even general anesthesia in young children. [1][2][3][4][5] In addition, serial or daily measurements to assess therapeutic success during treatment are not practicable using magnetic resonance. For longitudinal monitoring of cardiac function, echocardiography remains the method of choice 6 ; it can be applied easily to all patients at the bedside, but conventionally used two-dimensional (2D) methods lack precision in matters of stroke volume (SV) determination.…”