Mitochondrial ultrastructure in cardiac myocytes is associated with the cardiovascular death in patients with heart failure

Figure 2 Micrograph of a cardiomyocyte from the auricle of the right atrium of a patient with ischemic heart failure (magnification × 5000). An example of delineation of mitochondria and interfibrillary space is shown (yellow line), which is used to calculate the “Total area of the interfibrillar mitochondria” indicator. A: Initial view; B: Yellow lines indicate the contours of mitochondria and the contour of the interfibrillar space.