Atrial tracking modes. Do not use atrial tracking modes in patients with chronic refractory atrial tachyarrhythmias. Tracking of atrial arrhythmias could result in VT or VF.

• 心房追踪模式。对于有慢性顽固性房性心律失常的患者，不得使用心房追踪模式。对房性心律失常的追踪可导致室性心动过速或心室纤维颤动。