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Aortic Dissection mind map

Aortic dissection mind map, pathophysiology, clinical features, investigations, management

Aortic Dissection Revision Notes

Aortic Dissection pathophysiology

Pathophysiology

  • Aetiology: Marfan's syndrome, hypertension, atherosclerosis
  • Hypertension + thinned + diseased intima
  • progressive dilation/ aneurysm
  • Intimal tearing, blood flows forwards and backwards, causing false lumen
  • Types: type A- proximal/ ascending; Type B: Descending- beyond subclavian artery.
Aortic dissection investigations

Investigations

  • ECG: ST elevation if coronary arteries involved, small complexes if pericardial effusion
  • CXR: mediastinal widening, cardiomegaly, pleural effusion
  • Echocardiography: transoesophageal best, view dissection flap, assess aortic valve
  • CT scan: diagnostic test- urgent
Aortic Dissection clinical features

Clinical features

  • Pain- radiating to back, tearing
  • Blood pressure discrepancy R > L arm
  • Type A: tamponade, aortic regurgitation, myocardial infarction, stroke
  • Type B: limb ischaemia, renal failure, ischaemic gut
Aortic dissection management

Management

  • !Keep blood Pressure low!- IV betablocker, IV GTN
  • Type A- emergency surgery, mortality increases 2% per hour without surgery
  • Type B- conservative, lower BP, surgery in life saving situation only
  • Endovascular- stent- type B
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