Thanks for writing to us.
1. Any infection in body should be dealt promptly in any persons; especially if you have low EF, you must not challenge your heart with any infection.
2. The risk of infection going to heart, infective endocarditis
, is highest with tooth infections but as per current thinking, the predisposing heart conditions with highest risk are not there in your case. An AICD was classified as low risk in previous classifications.
you must discuss this issue with your dentist
and cardiologist , on priority, and proceed accordingly.