Activation of the ventricles starts with the interventricular septum.

心室激活始于室间隔。

This posterior descending branch also supplies the posterior one-third of the interventricular septum.

后降支也供应室间隔的后1/3区域。

The interventricular septum separates the two ventricles; the interatrial septum divides the two atria.

血管主要有三种类型，即动脉、静脉和毛细血管。动脉从心脏运出血液。因要承受心室泵血压力，故动脉血管壁最厚。

The QRS complex represents depolarization of the ventricles which starts with the interventricular septum.

QRS波群代表心室从室间隔开始的去极化。

It pushes against the interventricular septum, causing it to bow out into the left ventricle.

血压推向室间隔，使之偏向左心室。

Finally V1 and V2 are considered " septal" leads because they're nearest to the interventricular septum, and V3, and V4 are " anterior" leads because they're nearest the anterior wall of the heart.

V1和V2导联为“隔导联”，因为它们最接近心脏的室间隔；V3和V4导联为“前壁导联”，因为它们最接近心脏的前壁。

The left anterior descending artery are LAD generally supplies the anterior surface of the ventricles and the anterior two-thirds of the interventricular septum through septal branches.

左前降支一般通过室间隔支供给心室前表面和室间隔前三分之二。