Fig. 1From: Intact survival from severe cardiogenic shock caused by the first attack of atrial tachycardia treated with extracorporeal membrane oxygenation and surgical left atrium appendage resection: a case reportElectrocardiogram on admission to ICU. Regular positive P waves of 180–190 bpm and corresponding narrow QRS waves are seen in V1 and V2, although the P wave is masked by the T wave in most leads.Back to article page