This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Mitral stenosis Is associated with- 
Select and explain. 
A. Right ventricular hyper trophy, B. Left ventricular hyperophy, C. Left axis detion, D. Abnormal QRS complex
A: Right ventricular hyper trophy
Answer: A: Right ventricular hyper trophy 
Explanation: In patients with severe MS, there may be a malar flush with pinched and blue facies. In patients with sinus rhythm and severe pulmonary hypeension or associated tricuspid stenosis (TS), the jugular venous pulse reveals prominent a waves due to vigorous right atrial systole. The systemic aerial pressure is usually normal or slightly low. An RV tap along the left sternal border signifies an enlarged RV. A diastolic thrill may rarely be present at the cardiac apex, with the patient in the left lateral recumbent position. In MS and sinus rhythm, the P wave usually suggests LA enlargement The QRS complex is usually normal. However, with severe pulmonary hypeension, right-axis detion and RV hyperophy are often present. (Harrison&;s principle of internal medicine,18th edition,pg no. 1930 )