Identifying ECG Wave Patterns

Which wave in an electrocardiograph (ECG) represents atrial depolarization?

• P wave

• Q wave

• R wave

• T wave

Identify the wave in an ECG that indicates ventricular repolarization.

• P wave

• Q wave

• S wave

• T wave

In an ECG, which segment represents the time between the end of atrial depolarization and the start of ventricular depolarization?

• PR segment

• ST segment

• QT interval

• QRS complex

What does the QRS complex in an ECG signify?

• Atrial repolarization

• Ventricular depolarization

• Atrial depolarization

• Ventricular repolarization

Which part of the ECG is used to measure the time taken for the electrical impulse to travel from the atria to the ventricles?

• PR interval

• ST interval

• QT interval

• QRS duration

The ST segment in an ECG is crucial for diagnosing which of the following conditions?

• Atrial fibrillation

• Myocardial infarction

• Ventricular tachycardia

• Bradycardia

Which wave in an ECG is typically the largest and represents the main electrical impulse through the ventricles?

• P wave

• Q wave

• R wave

• T wave

What is the normal duration of the QRS complex in a standard ECG?

• 0.04 to 0.10 seconds

• 0.12 to 0.20 seconds

• 0.20 to 0.30 seconds

• 0.30 to 0.40 seconds