Question:
What is the most common cause of complete heart block (acquired complete AV block) in infants and children?
What is the most common cause of complete heart block (acquired complete AV block) in infants and children?
Show Hint
Think of trauma to the AV node during cardiac repair in children.
Updated On: Jun 24, 2026
- SLE
- Surgery for congenital heart disease
- Viral myocarditis
- Rheumatic fever
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: In children the most common cause of permanent acquired complete atrioventricular (AV) block is surgery for congenital heart disease. So the answer is option b.
Step 2: Post-surgical complete AV block results from trauma to the AV node during the operation, through haemorrhage, ischaemia, necrosis, inflammation or direct traumatic disruption of conducting tissue.
Step 3: The second most common cause is congenital heart disease itself associated with congenital complete AV block (for example in maternal SLE, but that is a congenital, not acquired, mechanism).
Step 4: Viral myocarditis and acute rheumatic fever can both cause AV block, but these are usually reversible and far less common than surgical injury, so they are not the single most common cause.
Step 2: Post-surgical complete AV block results from trauma to the AV node during the operation, through haemorrhage, ischaemia, necrosis, inflammation or direct traumatic disruption of conducting tissue.
Step 3: The second most common cause is congenital heart disease itself associated with congenital complete AV block (for example in maternal SLE, but that is a congenital, not acquired, mechanism).
Step 4: Viral myocarditis and acute rheumatic fever can both cause AV block, but these are usually reversible and far less common than surgical injury, so they are not the single most common cause.
Was this answer helpful?
0
0
Top NEET PG Pediatrics Questions
- A newborn presented with chest retractions, dyspnea, and lethargy. The pediatrician diagnosed the baby with respiratory distress syndrome. This occurs due to the deficiency of:
- A 10-year-old child weighing 30 kg presents with a history of loose stools for 2 days. On examination, there is severe dehydration. Laboratory investigations are as follows. What is the initial management as per ISPAD guidelines?
RBS 550mg/dL pH 7.01 Na+ 158mEq/L Urine glucose 3+
- Which of the following is the best sign to indicate adequate growth in an infant with a birth weight of 2.8 kg?
- A 3-month-old baby complains of deafness, cataract, and patent ductus arteriosus. Which of the following is the most likely diagnosis?
Chloride level in sweat is used in the diagnosis of which disease?
View More Questions
Top NEET PG Questions
- A patient hailing from Delhi presents with fever, arthralgia, and extensive petechial rash for 3 days. Lab investigations revealed a hemoglobin of 9 g/ dL, a white blood cell count of 9000 cells/mm3, a platelet count of 20000 cells/mm3, and a prolonged bleeding time. The clotting time was normal. What is the most likely diagnosis?
- Which of the following statements is true about Trichomonas vaginalis?
- A lady from West Rajasthan presented with an ulcer surrounded by erythema on the right leg. Microscopy of the biopsy from the edge of the ulcer showed organisms with dark staining nuclei and kinetoplast. What is the most likely causative agent?
- A child presents with a fever and a rash. Urine examination showed cells with owl's eye appearance. What is the most likely diagnosis?
- Infection with Clonorchis sinensis is associated with an increased risk of__?
View More Questions