MS-0264

A 30-year-old male patient complains of shortness of breath, weight loss, and night sweats for the past six weeks. Despite being generally healthy, he has been experiencing these symptoms. During the examination, the patient’s fingers show clubbing, and his temperature is 37.8°C. His pulse is 88 bpm, and his blood pressure is 128/80 mmHg. A pansystolic murmur is audible upon auscultation of the heart. What is the probable diagnosis?