Syncope means fainting or passing out. When fainting is caused by certain triggers, like the sight of blood or a needle, or an intense emotion like恐惧或恐惧, it’s called vasovagal syncope. It’s the most common cause of fainting.
Vasovagal syncope is sometimes referred to as a neurocardiogenic or reflex syncope.
任何人都可以体验血管腔的晕厥，但在儿童和年轻人中往往更为普遍。这种昏厥的人数同等地发生在男人和女人身上。
Although some causes of fainting can be a sign of a more serious health problem, that’s typically not the case with vasovagal syncope.
这个article will cover the causes, diagnosis, and treatment for vasovagal syncope, as well as signs that you should see a doctor.
整个身体都有特殊的神经，有助于控制您的心脏跳动的速度。他们还通过控制血管的宽度来调节血压。
通常，这些神经共同起作用，以确保您的大脑始终获得足够的富氧血液。
But, sometimes, they can get their signals mixed up, especially when you have a reaction to something that causes your blood vessels to suddenly open wide and your blood pressure to drop.
血压下降和心率较慢的结合可以减少流向大脑的血液量。这就是导致您昏倒的原因。
Besides reacting to the sight of something that scares you, or a having an intense emotional reaction, some other triggers that can cause a vasovagal syncope include:
- standing after sitting, bending, or lying down
- 长时间站立
- getting overheated
- intense physical activity
- severe pain
- intense coughing
概括
血管腔晕厥是由突然引起的drop in blood pressure，通常是由对某事的反应触发的。这会导致您的心脏在短时间内放慢脚步。结果，您的大脑可能无法获得足够的氧气血液，这会使您昏倒。
Vasovagal syncope is typically not a serious health condition.
您可能没有任何迹象表明您会晕倒之前。但是有些人确实有简短的迹象表明他们可能会晕倒。这些包括：
如果您通常在晕倒之前会经历这些警告信号，那么躺下来帮助增加大脑的血液流动是一个好主意。这可能会阻止您晕倒。
If you do pass out, you’ll likely regain consciousness within a few moments, but you might feel:
- exhausted
- 恶心
- 头晕
几分钟，您甚至可能会感到有些困惑或只是简单地“从中”。
如果您以前看过医生并且知道自己有血管晕厥，那么每次晕倒时都不必回去。
You certainly should keep your doctor in the loop, though, if you develop new symptoms or if you’re having more fainting episodes even though you’ve eliminated some of your triggers.
如果您以前从未昏倒过，并且突然出现了晕倒的情节，请务必得到医疗护理。某些可能使您容易昏迷的条件是：
Fainting can also be a side effect of medications, particularly antidepressants and drugs that affect blood pressure. If you think that’s the case, don’t stop taking your medication without talking to your doctor about alternatives.
如果您的医生认为您的药物可能导致您晕倒，他们将与您一起弄清楚如何安全地从它们中缩小您的情况而不会引起其他副作用。
Seek emergency medical attention if you (or someone else) lose consciousness and:
您的医生或医疗保健提供者将从详细的病史和一般体格检查开始。这项考试可能包括几个血压读数taken while you’re sitting, lying down, and standing.
Diagnostic testing might also include an心电图（ECG或EKG）评估您的心律。
这可能是诊断血管腔晕厥的全部，但是您的医生可能想排除其他一些可能的原因。根据您的特定症状和病史，进一步的诊断测试可能包括：
- 倾斜桌测试。这个测试allows your doctor to check your heart rate and blood pressure when you’re in different positions.
- 便携式抛光监视器。这个is a设备您穿着可以进行详细的24小时心律分析。
- 超声心动图。这个测试使用声波产生您的心脏图像及其血流。
- 运动压力测试。这个测试usually involves walking briskly or running on a treadmill to see how your heart functions during physical activity.
These tests can help confirm that you have vasovagal syncope or point to another diagnosis.
Vasovagal syncope doesn’t necessarily call for treatment. But it’s a good idea to try avoid those situations that trigger fainting and take measures to prevent injury due to falling.
没有标准治疗可以治愈所有原因和类型的血管腔晕厥。根据您的复发症状的原因，治疗是个性化的。一些血管腔晕厥的临床试验已产生令人失望的结果。
如果经常晕倒会影响您的生活质量，请与您的医生交谈。通过共同努力，您可以找到有助于的治疗方法。
Some of the medications used to treat vasovagal syncope include:
- alpha-1-adrenergic agonists，增加血压
- 皮质类固醇，有助于提高钠和液位
- selective serotonin reuptake inhibitors (SSRIs)，有助于调节神经系统的反应
您的医生将根据您的病史，年龄和整体健康做出建议。在最严重的情况下，您的医生可能想讨论获得的利弊起搏器。
可能无法完全防止血管腔的晕厥，但是您可能能够减少晕倒的频率。
最重要的步骤是尝试确定触发器。
抽血或看恐怖电影时，您会倾向于晕倒吗？还是您注意到当您过于焦虑或已经站了很长时间时会感到疲倦？
If you’re able to find a pattern, try to take steps to avoid or work around your triggers.
When you start to feel faint, immediately lie down or sit in a safe spot if you can. It could help you avoid fainting, or at least prevent injury due to a fall.
血管腔是晕倒的最常见原因。它通常与严重的健康问题没有连接，但是重要的是要看到医生可以排除任何可能导致您晕倒的潜在条件。
这种昏昏欲睡的情节通常是由某些触发因素引起的，例如看到吓到您的东西，强烈的情绪，过热或站得太久。
By learning to identify your triggers, you might be able to minimize fainting spells and avoid hurting yourself if you do lose consciousness.
因为晕倒可以其他原因，重要的是，如果您突然出现昏昏欲睡的剧集，或者以前没有一遍，请参阅您的医生。
Get immediate medical care if you injure your head when you pass out, have difficulty breathing, chest pains, or trouble with your speech before or after you faint.
