Table 1:

Charger Error Codes

Numeric Code	Code Description	Source	IPG Rechargeable? (Y/N)	Suggested Action
0	IPG deactivated	EMI or internal software conflict	N	Prompt follow-up for assessment and reactivation
1	Lead impedance change	Normal post-implant change vs. lead malfunction	Y	Prompt follow-up if message persistently recurring
2	CCM inactive	Exposure to strong magnetic field or high current condition with low impedance	Y	Prompt follow-up for impedance evaluation
3	CCM delivery not programmed	CCM turned off or in “standby”	Y	Prompt follow-up for reactivation
4	% CCM therapy low	Sensing changes, arrhythmia, or lead malfunction	Y	Prompt follow-up for arrhythmia management, mode, sensing, impedance, and/or detection window adjustment
5	Optimizer Smart™ temperature issue	Febrile illness or abnormal IPG/charger interaction	Not suggested	Pause charging, prompt follow-up, physical exam
6	Internal charger fault	Charger malfunction	N	Prompt follow-up for charger replacement
7	IPG not Optimizer Smart™ device	Wrong-generation Optimizer charger	N	Re-educate appropriately matched charger use
8	Battery depleted	Battery discharged completely or has operation interference	Not suggested	Pause charging, prompt follow-up

Abbreviations: CCM, cardiac contractility modulation; EMI, electromagnetic interference; IPG, internal pulse generator; N, no; Y, yes.