There are many causes of low QRS voltage on the electrocardiogram (ECG). Although uncommon, there is evidence that an enlarged aorta can cause diminished QRS amplitude on ECG. In this case report, we describe an unusual presentation of low QRS voltage confined to the first three precordial leads (V1-V3) in a 77-year-old female with ascending aortic aneurysm. Analysis of the patient's medical history, echocardiogram and contrast-enhanced computed tomography indicates that the ECG pattern was caused by interposition of the aortic aneurysm between the heart and the skin electrodes (V1-V3), revealing a possible indirect sign for large aortic aneurysm on ECG.

心电图 (ECG) 上 QRS 电压低的原因有很多。尽管不常见，但有证据表明主动脉增大会导致心电图上 QRS 波幅减小。在本病例报告中，我们描述了一位患有升主动脉瘤的 77 岁女性，其罕见的低 QRS 电压仅限于前三个心前导联 (V1-V3) 。对患者病史、超声心动图和对比增强计算机断层扫描的分析表明，心电图模式是由心脏和皮肤电极（V1-V3）之间插入主动脉瘤引起的，揭示了大主动脉瘤可能的间接征兆。心电图。