Q:

Which of the following congenital lesions of the coronary circulation causes a cardiac murmur that is similar to the murmur produced by a PDA?

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Which of the following congenital lesions of the coronary circulation causes a cardiac murmur that is similar to the murmur produced by a PDA? 


  1. Origin of the left coronary artery from the pulmonary artery
  2. Origin of the right coronary artery from the pulmonary artery.
  3. Coronary artery fistula.
  4. Membranous obstruction of the ostium of the left main coronary artery.

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C. Coronary artery fistula.

DISCUSSION: The major clinical finding with a coronary artery fistula is a continuous murmur over the site of the abnormal communication. This murmur may closely resemble that of PDA.

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