Open AAA, High risk CPET

~75yo lady with incidental finding of 6.6cm juxta-renal AAA. Not obviously amenable to EVAR. 

Background

  • Unprovoked DVT – warfarin 
  • PMR – 2.5mg pred for  years 
  • Independent, walks 1km/day 
  • Driving license automatically revoked due to AAA size causing social isolation and loss of independence for patient

Issues

  • Patient wishes
    • She understands the risks fully and wants to proceed open AAA
    • Very distressed by the threat of rupture and by her current loss of independence
  • Cardiac function/exercise tolerance
    • TTE and sestamibi normal
    • CPET results stratify to high risk category:
      • Low AT 8.4ml/kg/min, low peak VO2 10ml/kg/min
      • Symptomatic with Dizziness and fatigue
      • HR peaked early then decreased throughout test (very abnormal) – ? AF
      • DBP decreased
      • Reviewed at CPET MDT – high risk candidate for open procedure
  • Open v. EVAR
    • Potential for custom made EVAR graft however 12 weeks manufacturing time -> risk of rupture (10-20% annually) and longer time without independence preop.

Discussion

  • Potential for prehab but challenging with transport issues
  • What is her goal from the surgery? Avoid rupture vs to return to previous function. How does the latter goal align with likely outcomes from an open AAA. 
  • Cardiologists suggest AF (if present) not optimizable because she does not require rate control. 
  • How do we balance patient wishes against risks and potentially futile procedures?

Plan

  • Psychological support offered through CPET MDT
  • Holter monitor and cardiology follow up organised
  • Discuss with surgeon re. EVAR