Inferior-Lead Lambda (λ) Wave Revealing Critical Right Coronary Artery Stenosis: A Case Report

IF 0.9 4区 医学 Q4 CARDIAC & CARDIOVASCULAR SYSTEMS
Jian Xiong, Djandan Tadum Arthur Vithran, Jingjing Chai, Zheng Cao, Zhixiao Wang, Xiaoyong Hu
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引用次数: 0

Abstract

Lambda (λ) waves are uncommon ECG markers of malignant arrhythmias, usually associated with channelopathies or transient ischemia. We report a 34-year-old man with recurrent syncope preceded by subxiphoid chest pain and diaphoresis. Admission ECG showed λ-like morphology in the inferior leads with dynamic ST changes. Laboratory tests and echocardiography were normal, while Holter monitoring demonstrated persistent ST-segment depression. Coronary angiography revealed diffuse right coronary artery disease with a critical 95% stenosis, treated with drug-eluting stent placement. ECG abnormalities resolved after PCI, and syncope did not return. Serial angiography over 3.5 years confirmed sustained stent patency.

Abstract Image

下导联λ波显示危急右冠状动脉狭窄1例。
λ波是恶性心律失常不常见的心电图标记,通常与通道病变或短暂性缺血有关。我们报告一个34岁的男性复发性晕厥前剑突下胸痛和出汗。入院心电图示下导联λ样形态,伴有ST段动态改变。实验室检查和超声心动图正常,而霍尔特监测显示持续st段凹陷。冠状动脉造影显示弥漫性右冠状动脉病变,95%狭窄严重,接受药物洗脱支架置入术治疗。PCI后心电图异常消失,晕厥未复发。连续血管造影超过3.5年证实支架持续通畅。
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来源期刊
CiteScore
3.40
自引率
0.00%
发文量
88
审稿时长
6-12 weeks
期刊介绍: The ANNALS OF NONINVASIVE ELECTROCARDIOLOGY (A.N.E) is an online only journal that incorporates ongoing advances in the clinical application and technology of traditional and new ECG-based techniques in the diagnosis and treatment of cardiac patients. ANE is the first journal in an evolving subspecialty that incorporates ongoing advances in the clinical application and technology of traditional and new ECG-based techniques in the diagnosis and treatment of cardiac patients. The publication includes topics related to 12-lead, exercise and high-resolution electrocardiography, arrhythmias, ischemia, repolarization phenomena, heart rate variability, circadian rhythms, bioengineering technology, signal-averaged ECGs, T-wave alternans and automatic external defibrillation. ANE publishes peer-reviewed articles of interest to clinicians and researchers in the field of noninvasive electrocardiology. Original research, clinical studies, state-of-the-art reviews, case reports, technical notes, and letters to the editors will be published to meet future demands in this field.
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