DDs

Cardiovascular causes

• Myocarditis

• Decompensated congestive heart failure

• Pulmonary embolism

• Cardiac arrhythmia, tachycardia

• Aortic dissection

• Hypertensive emergencies

• Structural heart disease

• Myocardial drug toxicity (e.g., doxorubicin)

• Cardiac trauma (including iatrogenic/periprocedural)

• Takotsubo cardiomyopathy

• Stroke

Noncardiovascular causes

• Renal failure

• Critical illness (e.g., sepsis)

• Hypothyroidism or hyperthyroidism

Early repolarization

LBBB

Brugada syndrome

Myocarditis

Pericarditis

Pulmonary embolism

Hyperkalemia

Tricyclic antidepressant use

Poor ECG lead placement