QuestionSBA
QuestionChoice
This is incorrect as it best describes a third-degree heart block, also known as a complete heart block. P waves and QRS complexes here are regular but have no relationship.
10002013
b
A type of heart block characterised by a complete failure of an electrical impulse to reach the ventricles
QuestionChoice
This is incorrect as it best describes a left bundle branch block. It can indicate underlying heart diseases, such as dilated cardiomyopathy or hypertrophic cardiomyopathy.
10002014
c
A type of heart block characterised by a delay or block in the bundle of His on the left side of the heart
QuestionChoice
This is correct as it best describes a Mobitz II heart block. This is a type of second-degree heart block where QRS complexes are either randomly or regularly (e.g. 2:1) dropped after regular P waves. There is no PR interval prolongation. It can rapidly deteriorate into 3rd-degree heart block.
10002012
a
A type of heart block characterised by the presence of some P waves which are followed by QRS complexes. P waves are regular, and there is no prolongation of PR intervals
QuestionChoice
This is incorrect as it best describes a first-degree heart block. Here, the PR interval is simply prolonged with no dropped QRS complexes. It is the most benign heart block.
10002015
d
A type of heart block characterised by prolonged PR intervals with a regular rhythm and 1:1 ratio of P waves to QRS complexes
QuestionChoice
This is incorrect as it best describes a Mobitz-type I heart block. This is also a type of second-degree heart block, but here there is variation in PR interval length. It is also known as Wenckebach heart block.
10002016
e
A type of heart block where gradual prolongation of PR intervals is seen until a QRS complex is dropped
Concept
Chapter
2693
3699
Heart Block
Topic
134
Cardiology
12949
Which of the following best describes a Mobitz II heart block?
a