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Which of the following statements is correct concerning atrial septal defects (ASD)? | Which of the following statements is correct concerning atrial septal defects (ASD)? | ||
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D. Bacterial prophylaxis is recommended if the ASD is over 2 cm | D. Bacterial prophylaxis is recommended if the ASD is over 2 cm | ||
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==Answer== | ==Answer== | ||
The answer is C. | The answer is C. | ||
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The physiologic and hemodynamic effects of ASDs are related to the direction and amount of shunting between the atria. The amount of shunt is related to the size of the defect and the relative compliance of each side of the heart. Large defects (>1-2 cm) may be associated with pulmonary overcirculation. ASDs are usually associated with a LEFT to RIGHT shunt due to the relative compliance of the RIGHT ventricle compared to the LEFT. | The physiologic and hemodynamic effects of ASDs are related to the direction and amount of shunting between the atria. The amount of shunt is related to the size of the defect and the relative compliance of each side of the heart. Large defects (>1-2 cm) may be associated with pulmonary overcirculation. ASDs are usually associated with a LEFT to RIGHT shunt due to the relative compliance of the RIGHT ventricle compared to the LEFT. | ||
==Notes== | ==Notes== | ||
<references /> | <references /> | ||
==Keywords== | ==Keywords== | ||
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