الفهرس 
Embryology and anatomyOnly 14 pages are availabe for public view
 |  | from | 201 |  |  |
| | | from | 201 | | |
Abstract
PDA is one of most common congenital heart defect; it is a unique vascular structure that provides direct communication between pulmonary and systemic circulation. MDCT angiography is a good imaging modality that provide excellent information about congenital heart diseases and in this study MDCT can demonstrate the presence of PDA either isolated anomaly or associated with other anomalies , morphologic types of PDA based on its angiographic features either type A (conical) ,type B(window) Type C(tubular) , type D(complex) or type E(elongated) . The multiplanar reformatted and 3D reconstructed images were essential to visualize the PDAs and detection of their exact morphological type, course and diameters, which is important before percutaneous closure or stenting procedure of the PDA and also for selection of closure hardware. The aim of the work is to assess the role of MDCT angiography in description of morphological types of PDA either isolated or associated with other congenital anomalies. This study carried out on (30) patients referred to diagnostic radiology & medical imaging department at Tanta University Hospitals, the duration of this study started from March 2020 and end at April 2021. All included patients in this study were subjected to proper history taking and clinical examination, Echocardiography examination and radiological evaluation by MDCT angiography using 320-row multi-detector CT scanner installed at Tanta University Educational Hospital. The results of this study suggest that low dose MDCT is suitable for the assessment of PDA and its associated congenital anomalies. Although CT has the disadvantage of ionizing radiation, the alternative studies also have inherent limitations. Echocardiography may be limited in its ability to define extracardiac vessels. MRI is time-consuming, may require prolonged patient sedation, and may be difficult to perform in seriously ill patients. Catheter angiography has a relatively high radiation exposure, may require long sedation times, and may have catheter access complications. Echocardiography missed detection of two cases of PDA, while MDCT angiography was able to detect PDA in all cases and also various shapes of PDAs with or without associated congenital heart and vascular anomalies, appreciation of the location and morphological features of PDA is necessary for selecting the optimal treatment option in these patients. The most common morphological type of PDA was type A (cone shape with wide aortic and narrow pulmonary end) that represented about half percent of the studied cases (46.67%), also PDA is most frequently found on left side. Spearman correlation coefficient test demonstrated fair correlation between length of PDA and MPA (P=0.018). Duct dependent pulmonary congenital heart diseases were the most common duct dependent lesions detected in the current study.