Some patients with ICC can report cardiac symptoms such as blackouts, palpitations, or breathlessness. However, in the majority of cases, patients do not have symptoms and unfortunately in some of these, cardiac arrest can be the first presentation of their condition.
Some individuals can be identified by cascade family screening in clinic after identification of an ICC in a family member.
A proportion of individuals can be identified incidentally (e.g. by having a ECG for another reason such as athletic pre-participation screening)