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ECG changes in ventricular septic defect (VSD)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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These include:

  • if the defect is small the ECG may be normal
  • while the pulmonary resistance is low the volume overload of the left ventricle produces features of left ventricular hypertrophy
  • as the pulmonary resistance increases right ventricular hypertrophy occurs
  • as pulmonary and systemic vascular resistances become balanced the left ventricular volume overload is lost. The left ventricular hypertrophy regresses leaving pure right ventricular hypertrophy

Click here for example ECG and further information

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