Overview

• A systolic murmur is an abnormal sound that is present in systole, between the first heart sound (S1) and the second heart sound (S2).
• Note whether the murmur is present in early, middle or late systole, or is pansystolic.

• • Causes of Systolic Murmur

  • Aortic stenosis
  • Mitral regurgitation
  • Tricuspid regurgitation
  • Ventricular septal defect
  • Hypertrophic obstructive cardiomyopathy
  • Pulmonary stenosis
• Soft systolic murmur - likely innocent murmur due to physiological bloodflow
• Early systolic murmur - ventricular septal defect, mitral regurgitation, tricuspid regurgitation
• Ejection (Mid)Systolic Murmur - aortic or pulmonary stenosis
• Late systolic murmur - mitral valve prolapse
• Pansystolic murmur - tricuspid or mitral regurgitation