This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
In carcinoid syndrome, the ap of hea mostly affected is: 
Select and explain. 
A. Outflow tract of RV, B. Inflow tract of RV, C. Inflow tract of LV, D. Outflow tract LV
B: Inflow tract of RV
Answer: B: Inflow tract of RV 
Explanation: Answer is B (Inflow tract of RV) The most commonly involved valve in, carcinoid syndrome is tricuspid valve which forms the inflow tract of Right ventricle. Most commonly involved pa of hea : Inflow tract of RV (Tricuspid valve) Second most commonly involved pa of hea : Outflow tract of RV (Pulmonic valve)