With regard to the treatment of phaeochromocytoma, beta-blocker should never be given before alpha-blocker because it may cause:
Paradoxical rise in blood pressure due to unopposed alpha-mediated vasoconstriction
In pheochromocytoma, catecholamine excess acts on both alpha and beta receptors. Blocking beta receptors first removes vasodilatory/compensatory beta-2 effects, leaving alpha-mediated vasoconstriction unopposed, causing a dangerous paradoxical rise in blood pressure (hypertensive crisis).
Similar Questions
Which of the following is/are growth hormone receptor antagonist(s) indicated in the treatment of Acromegaly?
1. Octreotide
2. Lanreotide
3. Pasireotide
4. Pegvisomant
Select the correct answer using the code given below:
Liquorice misuse, by inhibiting 11 beta-hydroxysteroid dehydrogenase type 2 enzyme, can cause a condition which resembles the clinical features of:
Which of the following statements regarding Autoimmune Polyendocrine Syndromes (APS) is/are correct?
1. APS Type 1 is more common than APS Type 2.
2. APS Type 1 is inherited as an autosomal recessive condition.
3. APS Type 2 is inherited as an autosomal dominant condition.
Select the correct answer using the code given below:
Important Questions from Adrenal Disorders
- Match the List I with List II and select the correct answer using the code given below the lists:
List I
(disease)List II
(signs)A. Conn syndrome 1. Anosmia B. Turner syndrome 2. Tetany C. Kallman syndrome 3. Lymphoedema D. Cushing syndrome 4. Avascular necrosis of hip
Code: - Which of the following test has maximum sensitivity for diagnosing Pheochromocytoma?
- A 26 year old lady has a Prolactinoma (microadenoma). The best modality of treatment for her condition is:
- Escape behaviour with paroxysmal occurrence is seen in:
- Hirsutism is seen in which of the following ?
1. Polycystic ovarian syndrome
2. Congenital adrenal hyperplasia
3. Hypothyroidism
4. Ovarian tumour
Select the correct answer using the code given below:
