A normal rhythm Rs premature ventricular beat 人人人入人 C paroxysmal supraventricular tachycardia (PSVT) D atrial fibrillation arrhythmias E atrial flutter with variable Av conduction ++++++++++++++++ F atrial flutter with 1: 1 AV conduction G monomorphic ventricular tachycardia H Torsades de Pointes 从M从 √arrhythmias