[T-wave alternans and atrial tachycardia].

A 70-year-old male patient presented with acute respiratory failure. ECG at admission showed atrial tachycardia with macro T-wave alternans that disappeared as soon as normal sinus rhythm had returned. This ECG shape was not accompanied by either QT-prolongation or acute ischaemia. This case draws attention to atrial tachycardia (provoked here in a context of respiratory insufficiency) that may be the sole reason for macro T-wave alternans. Orv Hetil. 2020; 161(7): 275-277.