This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cystic fibrosis & Sleep apnea, Subject name: Medicine
[{'content': 'Obstructive sleep apnea may result in all of the following except? \nSelect and explain. \nA. Systemic hypeension, B. Pulmonary hypeension, C. Hea block, D. Impotence', 'role': 'user'}, {'content': 'Answer: C \nExplanation: OSAHS raises 24-hour mean blood pressure. The increase is greater in those with recurrent nocturnal hypoxemia and is at least 4-5 mmHg. The resultant hypoxia also leads to pulmonary aery constriction leading to PAH. Other effects of OSAHS- Personality and mood changes, depression and anxiety, sexual dysfunction- impotence and decreased libido, gastroesophageal reflux. Atrial fibrillation and stroke are also repoed.', 'role': 'assistant'}]