Cardiac disease in pregnancy radiation exposure

Cardiac disease in pregnancy Microchapters
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Special Scenarios: I. Pre-existing Cardiac Disease: Congenital Heart Disease Repaired Congenital Heart Disease Pulmonary Hypertension Rheumatic Heart Disease Connective Tissue Disorders II. Valvular Heart Disease: Mitral Stenosis Mitral Regurgitation Aortic Insufficiency Aortic Stenosis Mechanical Prosthetic Valves Tissue Prosthetic Valves III. Cardiomyopathy: Dilated Cardiomyopathy Hypertrophic Cardiomyopathy Peripartum Cardiomyopathy IV. Cardiac diseases that may develop During Pregnancy: Arrhythmias Acute Myocardial Infarction Hypertension
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]

Overview

If a pregnant patient is radiated with less than five rads, then they can be reassured that there is a very low likelihood of risk. If a pregnant patient is exposed to more than 15 rads, termination of the pregnancy is recommended. A routine chest x-ray is associated with radiation of 20 millirads to the chest. Standard fluoroscopy delivers 1-2 rads per minute. Cineangiography delivers 5-10 rads per minute. Only 5% of the radiation delivered is absorbed by the fetus. A lead apron should be used over the mother's pelvis to minimize the risk of radiation exposure. With the use of nuclear medicine procedures the radiopharmaceuticals collect in the bladder which is in close proximity to the placenta and is directly across from the fetus. The expected radiation with thallium-201 or Tc imaging is less than one rad per examination.

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