Ejection fraction determination by MR imaging: comparison with left ventricular angiography.

Abstract

To determine the accuracy of left ventricular ejection fractions (EFs) calculated from magnetic resonance (MR) images, 22 patients who underwent coronary angiography and left ventriculography were studied within 1-3 days by MR imaging. ECG-gated spin-echo 30-msec echo-delay images were obtained in end systole and end diastole in a plane through the long axis of the left ventricle perpendicular to the septum at a level through the aortic valve and apex. The area-length method was then used to calculate the EF from left ventriculograms and MR images. Angiographic EF correlated linearly with MR determinations. The mean differences in EF calculation between two observers were 5.0 +/- 6.9 for ventriculography and 2.7 +/- 7.8 for MR imaging. MR imaging, using image planes oriented to the left ventricular axes, can allow accurate EF calculation. This has the potential to be clinically useful in noninvasive evaluation of cardiac function.

Cardiac function by magnetic resonance imaging

“…These results are similar to those obtained in recent studies comparing ejection fraction by MRI and angiocardiography [4][5][6]. However, there are certain limitations of the MR method used.…”

Cardiac Function

“…Imaging Techniques Since the first publications on the use of MRI for quantification of cardiac volumes, function, and mass, results have been compared with those obtained with other ''established'' techniques, such as contrast ventriculography, echocardiography, radionuclide imaging, and indicator dilution or thermodilution techniques (Longmore et al 1985;Stratemeier et al 1986;Kaul et al 1986;Mogelvang et al 1986;Dilworth et al 1987;Markiewicz et al 1987b;van Rossum et al 1988a, b;Culham and Vince 1988;Debatin et al 1992b;Gopal et al 1993;Herregods et al 1994;Bavelaar-Croon et al 2000;Chuang et al 2000;Bellenger et al 2000aBellenger et al , 2002Chuang et al 2000;Myerson et al 2002a;Rajappan et al 2002;Sierra-Galan et al 2003;Ichikawa et al 2003). Nowadays, we notice the opposite phenomenon, i.e., MRI is increasingly used to validate other (novel) quantification approaches, emphasizing that MRI has become a front player when it comes to assessment of cardiac functional performance (Sugeng et al 2006;Niemann et al 2007;Nesser et al 2007Nesser et al , 2009 circles represents one control, and the filled circles represent the other control.…”

Right and left ventricular volume measurements in an animal heart model in vitro: first experiences with cardiac MRI at 1.0 T

“…More recently, several authors compared ultrafast multishot or single-shot echo-planar imaging (EPI) to conventional gradient techniques of the heart, demonstrating markedly shorter acquisition times without significant loss of temporal and spatial resolution enabling adequate delineation of the endocardial borders comparable to gradient cine MRI, and permitting breath-hold imaging [6,7,8,9]. Ventricular volumes and ejection fractions are important measurements of cardiac function, e. g., for obtaining prognostic indicators in patients with different relevant cardiac diseases [4] and frequently used parameters central to the objective characterization of cardiac performance [7].…”

“…Different MR techniques have been tested such as spin-echo (SE) imaging and gradient cine MR imaging [4,5]. More recently, several authors compared ultrafast multishot or single-shot echo-planar imaging (EPI) to conventional gradient techniques of the heart, demonstrating markedly shorter acquisition times without significant loss of temporal and spatial resolution enabling adequate delineation of the endocardial borders comparable to gradient cine MRI, and permitting breath-hold imaging [6,7,8,9].…”