Department of Cardiology, Limassol General Hospital, Limassol, Cyprus; University of Nicosia Medical School, Nicosia, Cyprus.
J Electrocardiol. 2022 May-Jun;72:39-43. doi: 10.1016/j.jelectrocard.2022.02.014. Epub 2022 Mar 10.
We report the case of a patient who presented with angina and ST-segment elevation in the precordial leads owing to a proximal occlusion of the left anterior descending coronary artery. Serial electrocardiography (ECG) showed signs consistent with the left septal fascicular block (LSFB). The latter was observed in conjunction with a pre-existing left anterior fascicular block and presented atypical ECG features, such as intermittent prominent anterior QRS forces (prominent R wave) in V2 only and preserved septal q waves in I and aVL. In the discussion, we present an overview of the electrocardiographic criteria for the diagnosis of the LSFB together with reasons for which LSFB may present with an atypical ECG picture.
我们报告了一例患者，因左前降支近段闭塞而出现心绞痛和前导导联 ST 段抬高。连续心电图（ECG）显示符合左间隔支阻滞（LSFB）的迹象。后者与先前存在的左前束支阻滞同时出现，并呈现出非典型的 ECG 特征，例如仅在 V2 导联中出现间歇性突出的前 QRS 力（突出的 R 波）和 I 和 aVL 导联中保留的间隔 q 波。在讨论中，我们概述了 LSFB 诊断的心电图标准，以及 LSFB 可能呈现非典型 ECG 图像的原因。
