atrio ventricular node

简明释义

房室结

英英释义

例句

1.In cases of severe bradycardia, a pacemaker may be needed to assist the atrio ventricular node (房室结).

在严重的心动过缓情况下，可能需要起搏器来辅助房室结（atrio ventricular node）。

2.A malfunctioning atrio ventricular node (房室结) can cause irregular heartbeats.

功能失常的房室结（atrio ventricular node）可能导致心跳不规则。

3.Doctors monitor the function of the atrio ventricular node (房室结) during an electrocardiogram.

医生在心电图检查中监测房室结（atrio ventricular node）的功能。

4.The electrical signals in the heart are regulated by the atrio ventricular node (房室结).

心脏中的电信号由房室结（atrio ventricular node）调节。

5.If the atrio ventricular node (房室结) is damaged, it can lead to heart block.

如果房室结（atrio ventricular node）受损，可能会导致心脏传导阻滞。

作文

The human heart is a complex organ that plays a crucial role in our overall health and well-being. One of the key components of the heart's electrical conduction system is the atrio ventricular node, which is often abbreviated as AV node. This small but vital structure is located between the atria and the ventricles of the heart. Understanding the function of the atrio ventricular node is essential for grasping how the heart maintains its rhythm and ensures efficient blood circulation throughout the body. The primary role of the atrio ventricular node is to act as a gatekeeper for electrical signals traveling from the atria to the ventricles. When the heart beats, it generates electrical impulses that cause the muscles to contract and pump blood. The sinoatrial node, located in the right atrium, initiates these impulses, causing the atria to contract and push blood into the ventricles. However, before the ventricles can contract, the electrical signal must pass through the atrio ventricular node. This delay in transmission is crucial. The atrio ventricular node slows down the electrical impulse, allowing the ventricles enough time to fill with blood before they are stimulated to contract. Without this delay, the atria and ventricles would contract simultaneously, leading to inefficient blood flow and potentially serious health issues. Thus, the atrio ventricular node plays a vital role in coordinating the timing of heartbeats. In addition to its role in impulse conduction, the atrio ventricular node also has an intrinsic ability to generate electrical impulses if the sinoatrial node fails. This backup function is essential for maintaining heart rhythm in certain situations. However, the impulses generated by the atrio ventricular node are slower than those from the sinoatrial node, which can lead to bradycardia, or a slower than normal heart rate. Understanding the atrio ventricular node is particularly important in the context of various cardiac conditions. For instance, if the atrio ventricular node becomes damaged or diseased, it can lead to heart block, a condition in which the electrical signals are significantly delayed or completely blocked. This can result in a range of symptoms, including fatigue, dizziness, and even fainting. In severe cases, a pacemaker may be required to help regulate the heart's rhythm. Moreover, the atrio ventricular node is also involved in the treatment of certain arrhythmias, which are irregular heartbeats. Medical professionals may use procedures such as catheter ablation to target and modify the conduction pathways associated with the atrio ventricular node to restore normal heart rhythm. In conclusion, the atrio ventricular node is a fundamental part of the heart's electrical system, responsible for ensuring that the heart beats in a coordinated and efficient manner. Its role in delaying electrical impulses and acting as a backup pacemaker highlights its importance in maintaining cardiovascular health. A deeper understanding of the atrio ventricular node can provide valuable insights into heart function and the potential implications of various heart conditions. As research continues to advance, the understanding of the atrio ventricular node will undoubtedly evolve, leading to better treatment options for individuals with heart-related issues.

人类的心脏是一个复杂的器官，在我们的整体健康和幸福中发挥着至关重要的作用。心脏电传导系统的关键组成部分之一是房室结，通常缩写为AV结。这个小而重要的结构位于心脏的心房和心室之间。理解房室结的功能对于掌握心脏如何维持其节律并确保全身的有效血液循环至关重要。房室结的主要作用是作为电信号从心房传递到心室的守门员。当心脏跳动时，它会产生电冲动，使肌肉收缩并泵送血液。位于右心房的窦房结启动这些冲动，导致心房收缩并将血液推入心室。然而，在心室收缩之前，电信号必须通过房室结。这种传输的延迟至关重要。房室结减缓电冲动的传递，使心室有足够的时间充满血液，然后再刺激它们收缩。如果没有这种延迟，心房和心室将同时收缩，导致血流不畅，并可能引发严重的健康问题。因此，房室结在协调心跳时发挥着至关重要的作用。除了在冲动传导中的作用外，房室结还具有在窦房结失效时生成电冲动的内在能力。这种备用功能对于在某些情况下维持心律至关重要。然而，房室结产生的冲动比窦房结产生的冲动要慢，这可能导致心动过缓，即心率低于正常水平。在各种心脏疾病的背景下，理解房室结尤为重要。例如，如果房室结受到损伤或患病，可能导致心脏传导阻滞，这是一种电信号显著延迟或完全阻塞的情况。这可能导致一系列症状，包括疲劳、头晕甚至晕厥。在严重情况下，可能需要植入起搏器来帮助调节心脏的节律。此外，房室结还参与某些心律失常的治疗，即不规则心跳。医疗专业人员可能会使用导管消融等程序来针对和修改与房室结相关的传导通路，以恢复正常的心律。总之，房室结是心脏电系统的基本部分，负责确保心脏以协调和有效的方式跳动。它在延迟电冲动和充当备用起搏器方面的作用突显了它在维护心血管健康中的重要性。对房室结的更深入理解可以提供有关心脏功能和各种心脏疾病潜在影响的宝贵见解。随着研究的不断进展，对房室结的理解无疑会不断发展，从而为心脏相关问题患者提供更好的治疗选择。