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Vascular ejection click

High pitched sound produced by the sudden tensing of the proximal aorta or pulmonary artery during early ejection.It  implies a dilated/hypertensive great vessel that conduct the normal opening sound to the surface.
Decreased vascular compliance is the rule.
Pulmonary ejection click is noticed in
  • Dilated pulmonary artery in PAH
  • Idiopathic dilatation of Pulmonary artery
Vascular PEC may not soften with inspiration
Aortic ejection click is seen in 
  • Aneurysm of aortic root
  • Systemic hypertension.
  • Aortic root dilatation
AEC of vascular type herad best over aortic area.