This is known as a " blocked" P wave or a " dropped" QRS complex.

这就是所谓的P波“被阻滞”或QRS波群“脱落”。

Lead V6 sees the opposite, producing a wide, characteristic " bunny ears" QRS complex with two R waves.

V6导联则相反，产生一个宽的、特征性的“兔耳”QRS波群，两个R波。

Premature atrial contractions are diagnosed with an ECG which shows an early and abnormal looking P-wave and a potential QRS that may go along with it.

房性期前收缩可通过心电图诊断，一般是出现一个提前的形状异常的P波，以及一个可能伴随出现的QRS波。

This results in a DELAYED and SLOWED depolarization of the affected ventricle, hence a broader QRS complex – typically longer than 120 milliseconds; and a loss in ventricular synchrony.

这导致受影响心室去极化延迟和减慢，因此出现更广泛的QRS波群，通常长于120 ms；心室同步性丧失。