ABSTRACT
One of the important diseases in the population is heart disease. Congenital heart disease complicated approximately one percent of all live births. Acute rheumatic fever involve the heart which can be fatal during the acute stage or lead to rheumatic heart disease, a chronic condition due to scarring and deformity of the heart valves. In this research have been investigated about the value of chest-X-Ray in 74 patient in the diagnosis of heart disease in patients of Modarres hospital during year of 1379 and decrypted radiographic appearances of heart disease through enlargement of cardiac chambers, vascularity of lung and final diagnosis of heart disease. Results of this research may be play a role in the planning for diagnosis of heart diseases and answer to this question that is it any role for CXR PA that is a simple and routine investigation for patients. The sensitivity and specificity of conventional radiology in the diagnosis of left to right shunt is 96.15 and 90.47 percent respectively and positively and negative predictive value is 86.2 and 97.43 percent respectively. In left a trial enlargement was 96.96 and 82.35 percent respectively and positive and negative predictive value is 84.2 and 96.55 percent respectively. In left ventricular enlargement was 73.3 and 82.5 percent respectively and positive and negative predictive value is 75.86 and85.5 percent respectively. In right a trial enlargement was 53.3 and 100 percent respectively and positively and positive and negative predictive value is-100 and 8735 percent respectively. In right ventricular enlargement is 86.95 and 72.72 percent respectively and positive and negative. The final diagnosis of heart predictive value is 89.95 and 72.72 percent respectively. Disease with conventional radiology consists of: 28.37 percent true definite diagnosis, 58.1 percent true differential diagnosis and 13.5 percent false diagnosis