PSI - Issue 40

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V.A. Mironov et al. / Procedia Structural Integrity 40 (2022) 307–313 V. A. Mironov at al. / Structural Integrity Procedia 00 (2022) 000 – 000

Fig. 3. The RCG, spectrogram, and digital values of the HRV parameters for a patient with CAN after surgical intervention. The RCG shows transition into the paroxysmal form of atrial fibrillation (AF). The dominating periodicity is humoral metabolic (VLF% – the spectral area painted black); autonomic regulation (LF%, HF%) is extremely low.

Fig. 4. The electron microscopy histology of a SAN pacemaker cell in the heart of a healthy person deceased from a non-cardiac cause. There are numerous normal mitochondria (a) with structurally integer cristae (b) in protoplasm.

Fig. 5. The ultrastructure of the transition cells of the cardiac conduction system in the region of the sinus node of a patient with cardiac autonomic neuropathy (ultrathin section contrasted by uranyl acetate and lead citrate, magnification 1575×) : chromatin margination in the nucleus (1), numerous swollen mitochondria with destructed cristae (2), inclusions of calcium in the mitochondria (3), lipofuscin (4) and lipid drops Davydova (2011).