QuestionSBA
QuestionChoice
The ECG does not show third-degree heart block. Third-degree heart block appears on an ECG as a much slower ventricular rate (30-40bpm), regular spaced QRS complexes, and mis-shaped/upside down QRS complexes with escape beats. Also, an inferior STEMI is seen on this ECG.
10000624
d
Third-degree heart block
QuestionChoice
An inferior STEMI is seen on this ECG in the ST segment elevation in leads II, III, and aVF. However, Mobitz type I second-degree heart block can also be seen as the PR interval progressively increases until a dropped QRS complex occurs and the cycle repeats.
10000625
e
Inferior STEMI
QuestionChoice
This ECG does show an inferior STEMI, as seen by the ST segment elevation in leads II, III, and aVF. However, it shows Mobitz type I second-degree heart block, not first-degree heart block. First -degree heart block would show a continuously raised PR interval with no blocked P waves, unlike this ECG which shows a progressively increasing PR interval until a P wave is blocked.
10000623
c
First-degree heart block + inferior STEMI
QuestionChoice
Whilst a second-degree heart block is seen, it is type I rather than type II. This ECG shows a progressive increase in PR interval until a dropped QRS complex occurs, which is diagnostic of type I second-degree heart block. Type II second-degree heart block is diagnosed via occasional blocked P waves which are not followed by QRS complexes. However, the PR interval remains the same. This ECG also shows an inferior STEMI.
10000622
b
Mobitz type II second-degree heart block only
QuestionChoice
An inferior STEMI can be seen due to ST elevation in leads II, III, and aVF. Mobitz type I second-degree heart block can also be seen as the PR interval progressively increases until a dropped QRS complex occurs and the cycle repeats.
10000621
a
Mobitz type I second-degree heart block + inferior STEMI
Concept
Chapter
2693
3799
ECG
Topic
159
Cardiovascular physiology
12671
Picture
1507
Image 5.png
images/5fr3qmqs1682079627301.jpg
images/5fr3qmqs1682079627301_256.jpg
images/5fr3qmqs1682079627301_512.jpg
OCgCBYJ2hmZwd4d+dwhmf4ePcvcX
Topic
159
Cardiovascular physiology
Which of the following options is the most appropriate interpretation for the above ECG?

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a