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Sometimes there is an opening between the 1 _______ and the left side of the heart, or even between the aorta and pulmonary artery.
2 _______ depend on the type of heart 3 _______. Sometimes, the defect is picked up on a routine examination; at other times there may be breathlessness, difficulty in walking or running, swelling of feet and puffiness of face, and later of the whole 4 _______. Some these anomalies can be surgically corrected.