QuestionSBA
QuestionChoice
No, this is not the correct answer. This would result in a wide QRS complex with the atrial and ventricular rate being independent of each other. This due to the ventricular pacemaker cells taking over the control of ventricular depolarisation.
10007789
e
3rd degree heart block
QuestionChoice
No, this is not the correct answer. This would result in a PR interval that is >0.2 seconds without any skipped beats.
10007787
c
1st degree heart block
QuestionChoice
No, this is not the correct answer. This would present with successively longer PR intervals until one QRS complex is dropped. There is no progression in the PR interval on this ECG.
10007786
b
2nd degree heart block mobitz type I
QuestionChoice
No, this is not the correct answer. This would lead to a wide QRS complex with no change to the PR interval.
10007788
d
Bundle branch block
QuestionChoice
The ECG shows a sudden drop in the QRS complex without any PR interval elongation. The P waves remain normal and the QRS complexes are of a normal width. This can be differentiated from 2nd degree heart block mobitz type I, which shows PR intervals that become successively longer until one QRS complex is dropped.
10007785
a
2nd degree heart block mobitz type II
Concept
Chapter
2693
3699
Heart Block
Topic
134
Cardiology
14104
Picture
1841
mobitz 2.png
images/acv34zk91683523584201.jpg
images/acv34zk91683523584201_256.jpg
images/acv34zk91683523584201_512.jpg
digGAoCHeZiNd/eIZ4dgdgg=
A 56-year-old man attends the cardiology clinic with reports of intermittent chest pain and dyspnoea. He has also experienced unexplained loss of consciousness on two occasions.

An ECG for this patient is taken shown below. [lightgallery]

The cardiologist explains that it shows an impairment of electrical conduction between the atria and the ventricles of the heart.

Which of the following is the most likely diagnosis?
a