system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A young man repos chest pain retrosternal over last few hours. Pain is not related to . and relieved significantly on sitting and forward. Likely possibility is -
assistant
The correct answer is  Acute pericarditis is a type of pericarditis (inflammation of the sac surrounding the hea, the pericardium) usually lasting less than 6 weeks. It is the most common condition affecting the pericardium. Ref Davidson 23rd edition pg 525