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Zorluk: OrtaPediatric Cardiovascular Disorders

Match each congenital heart defect to its most characteristic physical examination finding.

  • Patent ductus arteriosusContinuous 'machine-like' murmur loudest at the left infraclavicular area
  • Atrial septal defectWide and fixed splitting of S2 with a systolic ejection murmur at the left upper sternal border
  • Ventricular septal defectHarsh, holosystolic murmur loudest at the left lower sternal border
  • Coarctation of the aortaSystolic murmur radiating to the left interscapular region with associated delayed femoral pulses

Cevap

Patent ductus arteriosus presents with a continuous machine-like murmur. Atrial septal defect presents with fixed splitting of S2. Ventricular septal defect presents with a harsh holosystolic murmur. Coarctation of the aorta presents with a systolic interscapular murmur and brachiofemoral delay.
Each structural cardiac defect produces characteristic alterations in blood flow and hemodynamics, leading to pathognomonic physical examination findings that allow for direct clinical differentiation.

Adım Adım Çözüm

1
Analyze the hemodynamics of patent ductus arteriosus.
Identify that blood flows continuously from the higher-pressure aorta to the lower-pressure pulmonary artery.
This constant flow through both systole and diastole explains the continuous, machine-like murmur.
2
Analyze the physical signs of an atrial septal defect.
Identify fixed splitting of S2 and a flow murmur across the pulmonary valve.
Constant volume overload of the right heart delays pulmonic valve closure and creates excess flow through a normal pulmonary valve.
3
Evaluate the murmur of a ventricular septal defect.
Identify the harsh, holosystolic murmur at the left lower sternal border.
The significant pressure gradient during ventricular contraction creates high-velocity turbulent flow.
4
Determine the unique physical findings of aortic coarctation.
Identify the interscapular murmur and delayed femoral pulses.
The mechanical obstruction in the descending aorta delays blood flow to the lower extremities and creates localized turbulence.

Anahtar Kavram

Auscultatory and physical findings in pediatric congenital heart defects
Tahmini Süre:1m 0s
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Konular

Pediatric Cardiovascular Disorders

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