QuestionSBA
QuestionChoice
This is incorrect as it describes a third-degree heart block, also known as complete heart block. P waves and QRS complexes are regular in complete heart block but have no relationship to each other.
10002223
b
With a type of heart block characterised by a complete failure of the electrical impulse to reach the ventricles
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.

**Please may you rewrite the incorrect answer choices for this question. The question asks for presentations of partial 21-hydroxylase deficiencies but 4 out of the 5 answer choices are on types of heart block. Hence it is too obvious what the correct answer is.**
10002226
e
A type of heart block where gradual prolongation of PR intervals is seen until a QRS complex is dropped
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.
10002225
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 left bundle branch block. It can indicate underlying heart disease, including dilated cardiomyopathy or hypertrophic cardiomyopathy.
10002224
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
A patient with partial 21-hydroxylase deficiency has insufficient aldosterone and cortisol due to the reduced conversion of progesterone to 11-deoxycorticosterone and 17-hydroxyprogesterone in the 21-hydroxylase pathway. Overall, this results in reduced aldosterone and cortisol, but there is still enough for survival as it is only a partial deficiency. Furthermore, there is an increase in adrenal testosterone. This is because pre-cursors of aldosterone and cortisol build up in the adrenal glands and are converted to androgens. This results in hirsutism and virilisation in females.
10002222
a
Deficient aldosterone and cortisol but enough to get by. Clinical presentation may include hirsutism and virilisation
Concept
Chapter
2693
3835
Adrenal insufficiency and Addison's Disease
Topic
133
Endocrinology
12991
How does a female patient with partial 21-hydroxylase deficiency typically present?
a