Podcast
Questions and Answers
Why is the T wave (representing ventricular repolarization) normally pointing in the same direction as the QRS complex representing ventricular depolarization?
Why is the T wave (representing ventricular repolarization) normally pointing in the same direction as the QRS complex representing ventricular depolarization?
- Due to the hyperkalemia present during ventricular repolarization.
- Because repolarization is directed from endocardium to epicardium.
- Because depolarization is directed from epicardium to endocardium.
- Because repolarization starts in epicardial cells where the duration of action potential is shorter. (correct)
What is the significance of recording electrical activity between the electrodes in specific patterns in a 12-lead ECG?
What is the significance of recording electrical activity between the electrodes in specific patterns in a 12-lead ECG?
- To identify hyperkalemia in the heart.
- To capture electrical signals from different angles for more accurate interpretation. (correct)
- To detect left and right axis deviations.
- To monitor ventricular depolarization.
Which type of leads in a standard ECG involve limb electrodes as the positive and negative poles?
Which type of leads in a standard ECG involve limb electrodes as the positive and negative poles?
- Chest leads.
- Unipolar leads.
- Intracardiac leads.
- Bipolar leads. (correct)
Why does the T wave in an ECG represent ventricular repolarization?
Why does the T wave in an ECG represent ventricular repolarization?
What causes the repolarization process to start in epicardial cells?
What causes the repolarization process to start in epicardial cells?
What is the role of limb leads in a standard ECG?
What is the role of limb leads in a standard ECG?
How do unipolar leads differ from bipolar leads in a standard ECG?
How do unipolar leads differ from bipolar leads in a standard ECG?
In a 12-lead ECG, what do chest leads primarily help detect?
In a 12-lead ECG, what do chest leads primarily help detect?
What is the purpose of recording electrical activity between electrodes in specific patterns?
What is the purpose of recording electrical activity between electrodes in specific patterns?
Why are bipolar leads considered important in standard ECG interpretation?
Why are bipolar leads considered important in standard ECG interpretation?
