A cardiac problem which is present at birth is abbreviated as a(n)

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CHD stands for Congenital Heart Disease, which refers to any cardiac problem that is present at birth. The other options are not related to congenital heart disease. SA stands for sinoatrial node, a natural pacemaker of the heart. AED stands for Automated External Defibrillator, a device used to deliver an electrical shock to the heart in case of cardiac arrest. ECG stands for Electrocardiogram, a test that measures the electrical activity of the heart. CHF stands for congestive heart failure, a condition where the heart cannot pump blood efficiently.

A Cardiac Problem Which Is Present at Birth Is Abbreviated