ECG

Question 1

ECG

What is the normal range for PR interval in ECG?

Answer 1

0.12-0.20s

A shorter PR interval may indicate pre-excitation syndrome (“delta” wave), while a longer PR interval may suggest 1st degree AV block.

Question 2

ECG

What does a widened QRS complex indicate?

Answer 2

Ventricular premature beats, bundle branch block, severe hypokalemia

The normal range for QRS is 0.06-0.10s.

Question 3

ECG

What is the normal QT interval duration in ECG?

Answer 3

<= 0.44s

A prolonged QT interval can result from hypokalemia, hypocalcemia, or certain drugs such as class IA and III anti-arrhythmics, and tricyclics.

Question 4

True or False: A PR interval longer than 0.20s indicates 1st degree AV block.

Answer 4

True

This is a key indicator for diagnosing 1st degree AV block.

Question 5

ECG

Fill in the blank: A PR interval shorter than 0.12s may indicate _______.

Answer 5

pre-excitation syndrome

This condition is characterized by the presence of a delta wave.

Question 6

ECG

What condition is associated with a QRS duration greater than 0.10s?

Answer 6

Ventricular premature beats, bundle branch block, severe hypokalemia

A widened QRS complex can signal several cardiac issues.

Question 7

ECG

Fill in the blank: Prolonged QT intervals can be caused by _______.

Answer 7

hypokalemia, hypocalcemia, drugs

Notable drugs include class IA and III anti-arrhythmics and tricyclic antidepressants.