and Marco Rengo1
(1)
Department of Radiological Sciences, Oncology and Pathology, Sapienza University of Rome-Polo Pontino, Latina, Italy
(2)
Department of Radiology and Radiological Sciences, Medical University of South Carolina, Charleston, SC, USA
Damus–Kaye–Stansel Operation
Surgical operation performed in TGA, single ventricle, and restrictive VSD causing subaortic stenosis.
Side-to-side aorta and pulmonary artery connection to provide unrestricted blood flow from the systemic ventricle to the aorta.
D-Dimers
High negative predictive value for PE and DVT.
Positive D-dimer results with medium–high clinical probability of PE should be followed by CTA.
Dextrocardia
Anomalous cardiac position with the apex pointing the right chest wall.
Cardiac anatomy may be normal.
Check for other congenital cardiac lesions.
Differential diagnosis: in case of abnormal heart position, look for congenital absence of pericardium.
DiGeorge Syndrome
Genetic disease on chromosome 22 leading to thymic hypoplasia with low T cell count, hypoparathyroidism with hypocalcemia, and outflow tract defects of the heart (ToF, truncus arteriosus, interrupted aortic arch, right-sided aortic arch, aberrant right subclavian artery).
Dilated Cardiomyopathy
Impaired systolic function with dilatation of cardiac chambers.
Diastolic function can be normal or impaired.
Causes: inherited (25 %), myocarditis, metabolic, nutritional, and persistent tachycardia. Usually diagnosis of exclusion.
Differential diagnosis: ischemic heart disease, valvular disease, adult congenital heart disease, left ventricular noncompaction, iron-overloaded cardiomyopathy, alcoholic cardiomyopathy, hypertensive heart disease.
See also section Cardiomyopathies.
Dipyridamole
Indirect vasodilator agent used in stress MR.
Increase endogenous levels of adenosine blocking cellular uptake.
Dipyridamole dose: 0.56 mg/kg IV over 4 min.
Prolonged action (~30 min).Stay updated, free articles. Join our Telegram channel
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