Table 4: Decision Aid to Guide Determining Patients Suitable for Listing for a Box Change and Those who Require Pre-procedure Clinical Review.

	Proceed	Stop and Review
Wound	Well covered	Peri-erosion
Leads	Normal function	May need replacement
Pacemakers	On-going pacing need	Low frequency of pacing, who may not have on-going pacing need. Impaired LV function – may need LV/CSP High-burden RV pacing who may need LV/CSP lead.
ICD	Remains indicated	Never had shock – consider reviewing indication
ICD	Stable and good functional status	Change in condition, e.g. progressive heart failure
All	Well	Severe frailty, significant comorbidities, profound dementia

Green indicates to proceed and red indicates to stop and review. CSP = conduction system pacing; LV = left ventricular; RV = right ventricular.