AKT-0368

AKT-0368

A 67-year-old man presents for follow-up. He has a medical history of small cell lung cancer and ischemic heart disease. His cancer was detected five months ago and he recently finished a round of chemotherapy. In terms of his heart health, he experienced a heart attack two years ago and underwent primary angioplasty with stent placement. He has not had any angina since then.

Over the past week, he has been experiencing increasing shortness of breath, particularly at night, and has an occasional non-productive cough. He has also noticed that his wedding ring feels tight. Upon examination, his chest appears normal, but he does have distended neck veins and periorbital edema. What is the most probable diagnosis?