The P wave of a normal electrocardiogram coincides with which electrical events in the heart.

Question

BlackTom AI · Accepted Answer

The question asks which electrical events in the heart coincide with the P wave on a normal ECG. 
Option 1: 'Atrial repolarization' — Atrial repolarization does occur, but it is not visible as a separate deflection on a normal ECG because it is masked by the much larger QRS complex that accompanies ventricular depolarization. Therefore this choice is incorrect.
Option 2: 'Ventricular repolarization' — Ventricular repolarization corresponds to the T wave on the ECG, not the P wave. This makes the option incorrect.
Option 3: 'Atrial depolarization' — This is the correct association. The P wave represents the depolarization of the atria as the electrical impulse from the SA node spreads through the atrial myocardium, initiating atrial contraction. 
Option 4: 'Ventricular depolarization' — Ventricular depolarization is reflected by the QRS complex, not the P wave. Since the QRS complex corresponds to ventricular depolarization, this option is incorrect.

The P wave of a normal electrocardiogram coincides with which electrical events in the heart.单项选择题

类似问题

Match the number on the wave to its function. 1: Number 3 on the wave above represents… 2: What do numbers 2,4, and 5 represent on the wave above?

Match the number on the wave to its function. 1: Number 4 on the wave above represents... 2: Number 1 on the wave above represents…

The QRS complex represents

Identify this cardiac rhythm:

Identify this cardiac rhythm:

The QRS complex is associated with which portion of the cardiac cycle?

Question at position 9 During which phase of the cardiac cycle does atrial repolarization “appear” in an ECG?T waveQRS complexP wave

The QRS complex signifies

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单