الفهرس 
Introduction
Assessment of Left Ventricular Systolic FunctionOnly 14 pages are availabe for public view
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Abstract
The longitudinally and the circumferentially orientated myocardial fibers work together in fascinating manner to give an effective contractions.
Many recent studies stressed on the importance of long axis fractional shortening which represents the longitudinal oriented fibers work.
Ventriculography is the gold standard for LV function assessment.
The aim of the work is to evaluate the usefulness of circumflex artery motion and long axis fractional shortening in assessment of LV function compared to EF obtained by ventriculography.
The study was conducted on three hundred patients in national heart institute from July 2011 until July 2013.
All patients underwent careful history taking, physical examination, electrocardiogram, coronary and LV angiography. During the coronary and LV angiography CAM amplitude and EDD were obtained and then the FSL were calculated.
Statistical analysis revealed that there was a highly significant linear correlation between EF obtained by LV angiography and measurements of CAM at the proximal site, the distal site and the highest correlation was with the mean circumflex artery motion.
The ejection fraction was found to be more correlated with long axis fractional shortening (FSL) than the circumflex artery motion measurements.
The ejection fraction can be calculated from FSL mean by this equation
EF % = 29 + 2.3 x FSL
With determining 7.4 as a cut off value for FSL mean corresponding to normal ejection fraction (>50%), this value has a sensitivity and specificity of 100% and 93.75% respectively, a positive predictive value and a negative predictive value of 93.3 and 100 respectively.