NSTEMI is infraction that is limited to the inner layer of the ventricular wall.

NSTEMI是局限于心室壁内层的梗塞。

The susceptibility of the ventricular wall to this type of partial thickness infarction is not uniform.

心室壁对这种部分厚度梗死的易感性并不一致。

Because of this difference, the left ventricle needs to be stronger; and so the muscular layer of the left ventricular wall or its myocardium is three times thicker than the right ventricle's myocardium.

由于这种差异，左心室需要更强壮；因此左心室壁的肌肉，即心肌，比右心室的心肌厚三倍。

Concentric hypertrophy leading to diastolic failure can also be caused by aortic stenosis, which is a narrowing of the aortic valve opening, as well by hypertrophic cardiomyopathy, an abnormal ventricular wall thickening often from a genetic cause.

导致舒张性心衰的向心性肥大，也可能由主动脉瓣狭窄（即主动脉瓣开口变窄）造成，也可能由肥厚型心肌病（一种遗传性异常心室壁增厚）引起。

These transient changes to the terminal portion of the QRS complex reflect worsening crisis in the oxygen-starved ventricular wall, and probably result from progressive ischemia and necrosis of the Purkinje fibers a tissue more resistant to death than working muscle.

QRS波群终末的这些短暂变化反映了缺氧心室壁的恶化危机，可能是由于进行性缺血和浦肯野纤维坏死所致，浦肯野纤维是一种比工作肌更耐死亡的组织。