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.