الفهرس 
Introduction and aim of workOnly 14 pages are availabe for public view
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Abstract
One hundred and thirteen patients were included in this study, 62 were males and 51 were females.
44 cases were diagnosed to have supra-ventricular
arrhythmias of which 34 cases had supra-ventricular tachycardia
(SVT), 5 cases had atrial fibrillation (AF), 3 cases had sick sinus
syndrome (SSS) and 2 cases had atrial flutter.
Regarding the etiology of this type of arrhythmias:
In cases of supra-ventricular tachycardia, 18 cases were
idiopathic, 3 cases had ventricular septal defect, 3 cases had
cardiomyopathy 2 of them were obstructive and one was congestive,
3 cases had mitral valve prolapse, 3 cases had myocarditis, one
case had single ventricle, one case with secundum type of atrial
septal defect, one case with patent ductus arteriosus and one case
with aortic stenosis (sub-valvular type).
5 cases were diagnosed to have atrial fibrillation, 3
cases were male and 2 cases were females. Of these cases, one of
them was diagnosed to have congestive cardiomyopathy, another
case with rheumatic heart disease mitral insufficiency, one case with
ventricular septal defect and a case with thyrotoxicosis .
(226)
3 cases had Sick Sinus syndrome, 2 females and 1
male, 2 of these cases were due to post operative· correction of
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congenital heart lesions. One was D-type of transposition of the
great arteries and one case was after closure of atrial septal defect
of secundum type. The last one was due to myocarditis.
Two cases were diagnosed to be atrial flutter, one was male
and the other was female. The main etiologic factors of this disorder
were as follows : 1 case had rheumatic heart disease (mitral
incompetence and mitral stenosis) and one case was due to post
operative closure of primum type of atrial septal defect.
Regarding the conduction disorders we have:
42 cases with atrio-ventricular block
9 cases with intra-ventricular block
7 cases with pre-excitation
In the cases of atria-ventricular block:
21 cases have first degree A- V block
7 cases have second degree A-V block
14 cases have third degree A- Vblock
Of the group of first degree A-V block, 8 cases were found to
be of idiopathic etiology, 6 cases were due to rheumatic fever,3
(227)
cases with complete A-V canal, 2 cases with primum type of atrial
septal defect, one case was due to Ebstein’s anomaly of the tricuspid
valve and one case due to patent ductus arteriosus.
Patients with second degree A-V block were 7 in number, 4
males and 3 females and age range from 1-13 years. The main
etiology of these cases was as follows : 3 cases were due to
rheumatic fever, one case due to congestive cardiomyopathy, one
case due to digitalis toxicity, one case due to secundum type of atrial
septal defect and the last case was of idiopathic etiology.
Regarding cases of third degree A-V block, 14 cases were
diagnosed to have this disorder. 7 were males and at the same time
7 were females.The age range of this group was 1 day to 13 years
old. 6 cases were diagnosed to had congenital heart disease, 3 of
them have L-transposition of the great arteries, 1 case with
ventricular septal defect,one case with primum type of atrial septal
defect and one case with patent ductus arteriosus.