Introduction: Congenitally corrected transposition of the great arteries is a rare condition, representing less than 1% of all congenital heart diseases. It is characterized by a double discordance: atrioventricular and ventriculo-arterial. The ventricles are inverted, so that the aorta emerges anteriorly from the right ventricle (morphologically) located on the left side of the heart and the pulmonary artery emerges posteriorly from the left ventricle (morphologically) located on the right side of the heart. Associated lesions may occur: ventricular septal defect, pulmonary artery stenosis, malformations of the tricuspid valve (Ebstein type) and conduction abnormalities (atrioventricular and interventricular). Methods: We are presenting the case of a 36 years old male patient, with no chronic medical conditions, admitted in the County Emergency Clinical Hospital, Oradea, for the following complaints: mild dyspnea, decreased exercise tolerance, without angina. We performed the following: blood pressure monitorization, complete blood count, biochemistry measurements, electrocardiogram, and echocardiography (transthoracic and transesophageal) and chest X-ray. Results: At time of the hospital admission BP = 125/75 mm Hg; EKG: RS, 55/minute, LBBB. After performing echocardiography (transthoracic and transesophageal) we found corrected transposition of the great arteries, annuloaortic ectasia and interatrial septal aneurysm. Conclusions: Congenitally corrected transposition of the great arteries (as in the case of our patient) is diagnosed most often during adolescence or adulthood, when symptoms and signs usually occur due to: valve malfunctions, inability of the right ventricle to further ensure efficient pumping into the systemic circulation and also conduction abnormalities.
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