الفهرس 
Introduction & Aim of the \VorkOnly 14 pages are availabe for public view
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Abstract
I:”’ITRODrCTIO.’i
&
AII OF THE \VORK
Obstruction to left vemricular outtlow is most corrunonlv localized to the aortic valve_
However. obstruction may also occur above the valve (supravah11lar stenosis) or belovv
the valve (discrete subvah1ilar amiic stenosis) or may be caused by hypertrophic obstructive
cardiomyopathy. It was found that isolated aortic stenosis is the most common
lesion (Roberts,
19- ,. _’)-)
Valvular aortic stenosis without accompanying mitral valve disease very rarely-
occurs on rheumatic basis but instead is usually either congenital or degenerative in origin
(\Valier,
1986}
Myocardial hy-pertrophy is an adaptive mechanism that enables the heart to cope vvith
abnormal load conditions. It allows maintenance of normal ejection performance in the
chronicall}’ pressure-loaded ventricle such as occurring in aortic stenosis and hypertension.
Inadequate hypertrophy or depressed myocardial contractility leads to deterioration of ejection
perfonnance in patients ’vith these diseases (Carabello et al,
1980 ; Takal!ashi et al., 1980 and Huber et al., 1981).
Assessment of the severity of aortic stenosis is of great clinical
flO\v obstruction can be life threatening (Hatle 1980).
’””!”’” replacement much more successfhl in
patients \vho rtot yet develbped left ventricular failure. diagnosis and
recognition of increasing severity
utm1ost importal1ce (Sokolow et al., 1990).
stenosis is more difficult to recognize at chest heart is usually normal in size and
slightly enlarged
ever1with severe narrowing ofthe valve (Baron, 1988). ·
The most availa
. detectwn of left ventri
The electrocardiograp
· hypertrophy in children judjement (Devereux, 1
· With the use of e
·. the tast ten. years we heart disease(Bryg and echo cardiography hav and quantitative diagn
method assessing th
1988).
This work aims a
· 1 . Fm!ling out
electrocardiography or ventricular hy])ertrophy
· 2 . - Detection :of an
. ·. ste!).osis and degree
·•. • inlpl;linnent ofleft vent
. . -