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Questions and Answers
What does the S-T segment on an ECG represent?
Which leads are used to observe the lateral wall of the heart?
How many thick-lined boxes on an ECG paper represent 1 second?
Study Notes
- Thin lines on ECG paper represent 1 mm intervals or 0.04 sec.
- Thick lines on ECG paper represent 5 mm intervals or 0.2 sec.
- 1 thick-lined box (5 small boxes) represents 0.2 sec or 5mm.
- 5 thick-lined boxes (25 small boxes) represent 1 second.
- Tick marks on ECG paper rhythm strip represent 3 secs.
- P-R interval represents the propagation of cardiac action potential from atria through AV node to ventricles.
- S-T segment represents the interval between ventricular depolarization and repolarization.
- V1, V2, V3, V4, and V5 are leads used to observe different areas of the heart.
- V1 and V2 primarily observe the ventricular septum.
- V5, V6, lead I, and lead aVL observe the lateral wall of the heart.
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Description
How well do you know the ECG paper? Test your knowledge with this quiz and learn about the thin and thick lines, the time intervals they represent, and the different leads used to observe the heart. Discover the meaning of the P-R interval and the S-T segment, and improve your understanding of ECG rhythm strips. Perfect for medical students, healthcare professionals, and anyone interested in cardiovascular health.
