Heart blocks are classified by location where the blockage occurs.

心脏阻滞按阻滞发生的部位分类。

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。

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。

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。

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。

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。

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。

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。

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。