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. 2016 May 27;311(2):H465–H475. doi: 10.1152/ajpheart.00899.2015

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Fig. 5. — Electron micrographs of left ventricular myocardium. Electron micrographs of age-matched control representative of both control ages (A), MI4W (B), and MI20W (C). Columns show typical micrographs of sarcomere order, intercalated disc (ICD) organization and mitochondrial morphology (Mitochondria), of each treatment group. D: quantification of the volume density occupied by mitochondria, myofibrils, and cytoplasm. Myofibrillar contractile volume (MCV) is stated as a percentage in the bar graph.