There are three electrocardiographic patterns associated with<unk><unk> : Type I, Type II and Type III. The diagnosis of<unk><unk>  is based upon the presence of Type I EKG changes.  Patients with Type II or Type III<unk>  patterns can convert to a Type I<unk>  pattern following the administration of sodium channel blockers such as ajmaline and flecainide.  Type 1<unk><unk>  may always be present on the EKG, or it may be elicited by the administration of particular drugs (e.g., Class IC antiarrythmic drugs that blocks sodium channels such as ajmaline, flecainide) or it may be unmasked by various triggers or risk factors.
Brugada syndrome electrocardiogram
Boerhaave syndrome electrocardiogram
Haff disease electrocardiogram
Short QT syndrome electrocardiogram
Sick sinus syndrome electrocardiogram
Andersen-Tawil syndrome electrocardiogram
Noncompaction cardiomyopathy electrocardiogram
Toxic Adenoma electrocardiogram