Heart blocks are classified by location where the blockage occurs.

心脏阻滞按阻滞发生的部位分类。

Third degree, or complete heart block, describes when the signal is completely blocked when moving from the atria to ventricles, every time.

三度房室传导阻滞，或称为完全阻滞，是指每个由心房向心室传导的电信号都被阻滞。

Patients with third-degree heart blocks are at high risk of cardiac arrest.

III度心脏传导阻滞患者具有心脏骤停高风险。

In fact, it's estimated that about 20 percent of patients that have a heart attack go on to develop a heart block.

事实上，约有20%的病人在心脏病发作后出现了心脏阻滞。

A consistent long PR interval of more than 5 small squares constitutes first-degree heart block.

持续长PR间期＞5个小方格构成I度心脏传导阻滞。

This is a very inefficient way for the heart to move blood, and it's a condition known as heart block.

对于心脏来说，这是一种非常低效的血液流动方式，这种情况被称为心脏传导阻滞。

This can cause the atria and ventricles to contract in an uncoordinated way and is a condition known as heart block.

这会导致心房和心室收缩不协调，发生一种称为心脏传导阻滞的疾病。

Patients with complete heart block are usually symptomatic, with symptoms ranging from syncope, confusion, dyspnea, severe chest pain, and these patients are at risk of dying.

完全传导阻滞患者通常都有症状，包括晕厥、意识障碍、呼吸困难以及严重的胸痛，甚至有死亡风险。

Heart block is a group of diseases characterized by presence of an obstruction, or a " BLOCK" in the heart electrical pathway.

心脏传导阻滞是一组以心脏传导通路阻塞或“传导阻滞”为特征的疾病。

In this example, there are three P waves for every QRS complex and the condition is described as " 3 to 1" heart block.

此时，每个QRS波群有3个P波，这种情况为“3： 1”心脏传导阻滞。

Piece of that broke off, went up the vein, through the heart, blocked the blood flow to her lungs. No blood flow, no oxygen.

一小块掉了下来 随着血流 穿过她的心脏 堵在肺里。

Heart blocks are classified by location where the blockage occurs: - SA nodal block, or SA block – blockage within the SA node.

-窦房结结阻滞，或窦房阻滞--窦房结内的阻滞。

This so-called " group beating" can be differentiated from a type 1 second-degree atrioventricular heart block by identifying the abnormally shaped p-waves that are characteristic of an atrial ectopic focus.

所谓的“成组搏动”可以通过辨认房性异位起搏点产生的异常形状的P波与二度I型房室传导阻滞相鉴别。

Heart block describes a type of arrhythmia, or abnormal rhythm, that happens when the electrical signal gets held up and delayed, or blocked entirely at some point along the conduction system.

心脏阻滞是心律失常（即心律异常）的一种，发生于正常电信号在心电传导系统的某一节点被延误甚至是完全阻滞。

Second- degree type II is less common than second-degree type I but is much more dangerous as it frequently progresses to complete heart block or cardiac arrest.

相较于II级I型，II度II型比较不常见，但更危险，因为它经常进展到完全性心脏传导阻滞或心脏骤停。

So when heart tissue turns all stiff and mineralized, it can’t conduct those signals as well, and your heart can’t keep that smooth, steady beat – a condition called heart block.

因此，当心脏组织变得僵硬和矿化时，它也无法传导这些信号， 并且您的心脏无法保持平稳、稳定的跳动——这种情况称为心脏传导阻滞。