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所在平台: Udemy |
课程主页: https://www.udemy.com/course/asystole-introduction-causes-symptoms-management/
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课程名称：心脏停搏：概述、原因、症状及管理 课程概述：本课程介绍了心脏停搏的基本知识和相关内容。心脏停搏是指心脏的电气系统完全失效，导致心脏停止泵血。这种情况通常被称为“平线”，因为在心电图中，心脏的电活动显示为一条平坦的线。心脏停搏是一种心脏骤停，意味着心脏完全停止跳动，这通常会导致患者失去意识，也可能导致呼吸停止或仅有微弱的喘息。若不立即进行心肺复苏（CPR）或医疗干预，心脏停搏会在数分钟内致命。 心脏停搏为什么被称为平线？心脏停搏是一种临床体征，而非症状，因为没有特殊设备，你无法直接看见或感受到它。使用心电图（EKG或ECG）是唯一可以“观察”心脏停搏的方式。这个诊断测试通常涉及将多个传感器（通常是12个）附着在胸部的皮肤上，这些叫做电极的传感器可以检测心脏的电活动，并以波形图的形式显示出来。 心脏停搏是如何发生的？每次心跳分为两个步骤：收缩（systole）和舒张（diastole）。收缩是指心脏生成小电流，触发心脏肌肉的收缩；舒张是指心脏肌肉在跳动之间的放松，让心脏的腔室充满血液并在下一次心跳中泵出。当发生心脏停搏时，心脏的电气系统没有可检测的活动，没有电流的产生，心脏完全停止泵血，进入心脏骤停状态，这种情况被称为“临床死亡”。 本课程将深入探讨心脏停搏的机制、症状及应对措施，旨在提高学习者对于这一生命威胁情况的认识和处理能力。
What is asystole?Asystole is when your heart's electrical system fails entirely, which causes your heart to stop pumping. It is also known as "flat-line" or "flat-lining" because of how your heart's electrical activity appears as a flat line on an electrocardiogram.Asystole is a type of cardiac arrest, which is when your heart stops beating entirely. This usually makes you pass out. It's also likely that you'll stop breathing or that you'll only have gasping breaths. Without immediate CPR or medical care, this condition is deadly within minutes.Why is asystole called flat-line?Asystole is a clinical sign rather than a symptom because you can't see or feel it without special equipment. The only way to "see" asystole is by using an electrocardiogram (often abbreviated as ECG or EKG). This is a diagnostic test that involves several (usually 12) sensors attached to the skin of your chest. Those sensors, called electrodes, detect your heart's electrical activity and show it as a wave pattern on either a printout or a screen display.As an electrical current travels through your heart with each heartbeat, an EKG's waves show the strength of that current and how it moves through your heart. There's no electrical activity to create the wave with asystole, so it appears as a flat line.How does asystole work?Every time your heart beats, it does so in two steps: systole (sis-toe-lee) and diastole (dye-ast-oh-lee).Systole: Each heartbeat happens because your heart generates a small electrical current, which then moves through your heart. That current is necessary because as it travels, it triggers a squeezing action - systole - in each section of heart muscle.Diastole: This is when your heart muscle relaxes between beats. The relaxed muscle lets your heart's chambers expand and fill up with blood, and your heart will pump out that blood during the next heartbeat.When asystole happens, your heart's electrical system has no detectable activity at all. Without electrical current, your heart stops pumping entirely, and you go into cardiac arrest. When you go into cardiac arrest, this is a state known as "clinical death."
