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Machine-like murmur
🔊A patent ductus arteriosus (PDA) is a persistent opening between the aorta and the pulmonary artery that normally closes shortly after birth.
🎧One of the hallmark signs of PDA is a continuous, "machine-like" murmur heard on auscultation, typically at the left upper sternal border.
🩸This murmur results from blood flowing from the high-pressure aorta into the lower-pressure pulmonary artery, creating turbulent flow throughout the cardiac cycle.
💉While PDA can eventually lead to signs of heart failure if untreated, cyanosis, chronic hypoxemia, and weak pulses are not typical early findings unless complications develop.
📌Core message
Patent ductus arteriosus presents with a continuous "machine-like" murmur due to abnormal blood flow between the aorta and pulmonary artery; early detection is key to prevent complications.
This question is from ATI LPN Paediatrics Exam Cohort 65 Exam-2 which contains 41 questions.
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