为了让你的心脏正确击败，你的心脏组织在整个心脏过程中进行电气冲动muscle以常规模式。
这种电气冲动使您的心脏的上部腔室（Atria）首先合同，以及之后的两个下腔室（脑室）。
如果这种电路的任何部分受阻，则称为束分支块。当发生这种情况时，电动脉冲移动速度较慢以达到其端点。这使得你的心脏使你的心脏有效地在整个身体上泵出血。
With left bundle branch block there is a delay or obstruction along the electrical pathway to your heart’s左心室。This is the lower-left portion of your heart.
如果电脉冲沿着通往心脏右心室的途径延迟，则它被称为右束分支块。
Left bundle branch block often doesn’t cause any symptoms. In fact, some people have it for years and never know they have the condition.
For others, however, a delay in the arrival of electrical impulses to the heart’s left ventricle can cause昏厥(fainting), due to unusual heart rhythms that affect blood pressure.
有些人也可能经历了叫做的东西presyncope。This involves feeling like you’re about to faint, but never actually fainting.
Other symptoms can include fatigue and shortness of breath.
Left bundle branch block can be caused by several different heart conditions.
例如，一个heart attackcan damage your heart tissue, making it harder for your heart to conduct electrical impulses. This can result in bundle branch block at either the right or left ventricle. A new left bundle branch block should warrant work-up for a prior heart attack.
可能导致左捆绑分支块的其他条件包括：
- 冠状动脉疾病
- heart failure
- 高血压（高血压）
- 与之存在的问题主动脉瓣
- 心脏感染（myocarditis的）
- 削弱，放大或加强的心肌（cardiomyopathy的）
然而，有时，左束分支块可能会发生没有任何潜在的心脏条件。尚不知道为什么会发生这种情况，但它最常见于老年人。
医生通常使用以下测试诊断左捆绑分支块：
- 心电图（EKG或ECG）。这是最常用于诊断您心中的电气冲动问题的测试。一个心电图是一种无痛的测试，涉及将贴纸（称为铅）放在胸部周围。引线导电。它们连接到导线，从而感觉到心脏的电气冲动并监测你的心脏节奏。
- 超声心动图。一个echocardiogram uses sound waves to produce live images of your heart. It allows your doctor to see how your heart and your heart valves are working and how the chambers are pumping. It also lets your doctor measure the thickness of your heart muscle and to see the overall structure of your heart. This test can be helpful for identifying possible causes of left bundle branch block.
- 药理应力测试。This test uses medicine to make your heart work just as it does when you exercise, without requiring you to exert yourself. It dilates the blood vessels leading to your heart, but it doesn’t increase your heart rate. This test helps your doctor determine if there’s adequate blood flowing to your heart when you exert yourself versus when you’re at rest.
- Blood work.Your doctor may order blood work to check your cholesterol levels and other factors that could be contributing to your left bundle branch block.
Left bundle branch block doesn’t always require treatment, especially if you don’t have any underlying heart conditions.
如果你确实有另一种心脏病，你的医生可能表明如果你是稳定的话，他们可能会对潜在的原因或根本没有治疗。
如果由于导通系统的电气问题而留下捆绑分支块，例如，您可能需要一个pacemaker。这是一种发出电力以帮助您的心脏保持一致节律的设备。
如果你有高血压，你可能需要采取medication保持控制。这也会有助于减少心脏的压力。
在治疗潜在条件的同时可能无法完全摆脱左束分支块，可以减少并发症的风险，例如渐进疾病。
虽然任何人都可以发展左捆绑分支块，但有些人因影响他们的心脏或肺部的其他条件而产生更高的风险。
可以在左侧或右侧增加捆绑分支块的条件包括：
- atrial or心室隔膜缺陷
- cardiomyopathy
- 冠状动脉疾病
- 高血压
如果您有任何这些条件，您的医生可能会定期监测心律，以检测任何捆绑分支块的迹象。
A disrupted electrical signal in your heart can cause the following complications:
- abnormal heart rhythms
- 心率较慢
- 晕倒
- cardiomyopathy
- 增加心力衰竭风险
有时，捆绑分支块可以使医生更难诊断其他心脏病，例如心力衰竭或在largement。
If you’ve been diagnosed with left bundle branch block, make sure to tell any other doctors you see that you have this condition.
If you have left bundle branch block, it’s important that you have regular medical checkups, so your doctor can monitor your heart health and prescribe treatment if it becomes more serious.
为了遵循您的医生的指示，遵循您需要的后续护理至关重要。
左捆绑分支块是一种条件，其中沿着电气通路的速度减慢了您的心脏左心室。发生这种情况时，电脉冲必须进一步旅行以达到其端点。这使得您的心脏更难有效地泵出血。
Left bundle branch block can be caused by many heart conditions, and it’s typically diagnosed with an electrocardiogram or an echocardiogram.
根据左捆绑分支块的严重程度，您的医生可能会推荐起搏器或药物，以帮助治疗可能导致心脏中的电气通路的问题的潜在条件。