第18课 罕见的束支传导阻滞 |
| |
引用本文: | 鲁端,王劲. 第18课 罕见的束支传导阻滞[J]. 心电学杂志, 2006, 25(2): 125-127 |
| |
作者姓名: | 鲁端 王劲 |
| |
摘 要: | The electrocardiographic(Fig. 1) has been recorded from an asymptomatic 52-year-old woman free from organic heart disease,who was admitted to the outpatient department beacause a routine ECG had pointed out some abnormalities1: ①The QRS axis is at +90°, ②The QRS duration is 0.14 seconds, ③ The QRS configuration in the limb leads is suggestive of BBB, but it is hard to define, on the basis of these leads only, which type of BBB (right or left) is involved2.The wide S waves in leads I and aVL suggest at first glance an RBBB, whereas the QRS morphology in the inferior leads (monophasic R wave with secondary ST-T changes) is more consistent with an LBBB with relative right axis deviation, ④The chest leads further complicate the problem because lead V1 suggests an RBBB, whereas leads V5 and V6 are perfectly consistent with an LBBB, showing a monophasic R wave3, in addition, lead V5 shows ST-segment depression and negative T wave, typical of LBBB. It is worth noting that when the tracing was recorded, the correct placement of precordial electrodes was accurately checked, ⑤ Placement of precordial electrodes of leads V4,V5,and V6 2 intercostals spaces above restores4,in these leads, a QRS configuration suggestive of RBBB:small and relatively wide s waves appear and the T waves become positive.
|
关 键 词: | 右束支传导阻滞 左束支传导阻滞 QRS电轴 常规心电图 无器质性心脏病 罕见 ST-T改变 女性患者 肢体导联 QRS时间 |
Lesson Eighteen An Unusual Bundle Branch Block |
| |
Abstract: | |
| |
Keywords: | |
本文献已被 万方数据 等数据库收录! |
|