CVT ECG Interpretation & Analysis 3

Question 1

In atrial flutter, the atrial rate is typically:

Accepted Answer

250–350 bpm

Answer

Atrial flutter produces a characteristic sawtooth pattern at an atrial rate of 250–350 bpm, most commonly around 300 bpm.

Question 2

ST depression that is horizontal or downsloping in leads V4-V6 during an exercise stress test is most suggestive of:

Accepted Answer

Myocardial ischemia

Answer

Horizontal or downsloping ST depression ≥1 mm at 80 ms after the J point during stress testing is the standard criterion for inducible ischemia.

Question 3

Which ECG pattern is seen in Brugada syndrome?

Accepted Answer

ST elevation in V1-V3 with coved morphology

Answer

Brugada syndrome shows a coved-type ST elevation (≥2 mm) in right precordial leads V1-V3, associated with risk of sudden cardiac death.

Question 4

A first-degree AV block is defined by a PR interval of:

Accepted Answer

>200 ms

Answer

First-degree AV block is diagnosed when the PR interval consistently exceeds 200 ms (5 small boxes) with all P waves conducted.

Question 5

Which rhythm shows progressive lengthening of the PR interval until a QRS is dropped?

Accepted Answer

Mobitz type I (Wenckebach) block

Answer

Mobitz type I (Wenckebach) block features progressive PR prolongation until one P wave is not conducted, then the cycle resets.

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