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1.The patient was placed on a ventricular-triggered standby pacemaker after the heart attack.
在心脏病发作后，患者被安置了一个心室触发的备用起搏器。
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2. The device is designed to monitor the patient's heart rhythm and provide an automatic backup pacemaker in case of atrial fibrillation.
该设备旨在监测患者的心律并提供自动备份起搏器，以防房颤发生。
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3. The patient's condition improved significantly after receiving the ventricular-triggeredstandby pacemaker.
在接受心室触发的备用起搏器治疗后，患者的病情显著改善。