ECG: T wave changes

Peaked T waves

• hyperkalaemia
• myocardial ischaemia

Inverted T waves

• myocardial ischaemia
• digoxin toxicity
• subarachnoid haemorrhage
• arrhythmogenic right ventricular cardiomyopathy
• pulmonary embolism ('S1Q3T3')
• Brugada syndrome