A 72-year-old male is evaluated for a 4-month history of progressive exertional dyspnea. He has a 3-year history of ischemic cardiomyopathy. Medical history is significant for renal cell carcinoma treated with surgical resection 4 years ago. Which of the following complications of his medical history is most likely contributing to his current symptoms?
a) Recurrence of renal cell carcinoma
b) Development of pulmonary embolism
c) Progression of ischemic cardiomyopathy
d) Chronic kidney disease
