intra-atrial block

例句：

1. 1. The patient experienced a sudden onset of chest pain and was diagnosed with intra-atrial block.
   患者突然感到胸痛，被诊断为心房内阻滞。
2. 2. During the surgery, the surgeon noticed an intra-atrial block and immediately performed a cardiopulmonary bypass.
   手术中，外科医生注意到了心房内阻滞，并立即进行了心肺转流。
3. 3.The patient's condition worsened due to the intra-atrial block and required immediate treatment.
   由于心房内阻滞，患者的病情恶化，需要立即治疗。