A 60-year-old Black patient with a history of lumbar spinal stenosis had 2 months of chest pain and shortness of breath with exertion and 3 months of toe numbness. Laboratory testing showed elevated levels of high-sensitivity troponin, brain-type natriuretic peptide, aspartate aminotransferase, and alanine aminotransferase; bone scintigraphy showed increased cardiac uptake. What is the diagnosis and what would you do next?
Source: JAMA Online First