QuestionSBA
QuestionChoice
This is a narrow complex tachycardia with atrial activity >300bpm. A 'saw-tooth' pattern would be seen on ECG.
10000035
e
Atrial flutter
QuestionChoice
This is 3rd degree or complete heart block whereby atrial impulses do not pass to the ventricles. Patients require a permanent pacemaker as definitive management due to the severity of this condition.
10000034
d
Complete heart block
QuestionChoice
Mobitz type I (Wenckebach phenomenon) is a type of 2nd-degree heart block due to a block in conduction through the AV node. This would present as **progressive PR interval lengthening** and then would drop off, failing to conduct a QRS complex.
10000032
b
Mobitz type I
QuestionChoice
This is a type of 2nd-degree heart block where P waves fail to be conducted. The PR interval remains at a constant length however it is not consistently conducted and may or may not show a fixed ratio e.g. 2:1.
10000033
c
Mobitz type II
QuestionChoice
Electrical activity is being prolonged through the AV node and therefore causes a prolonged PR interval (>200ms). 1st-degree heart block can occur in those with a high vagal tone e.g. athletes.
10000031
a
1st-degree heart block
Concept
Chapter
2693
3699
Heart Block
Topic
134
Cardiology
12553
An athlete is having a routine health screening check including routine blood tests and an ECG. The findings on ECG show a PR interval of >200ms.

Which of the following is the most likely diagnosis?
a