Understanding the Cardiac Cycle and Electrical Conductivity in the Pulmonary System

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Photograph of a dissected mammalian heart

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Fig 1: (Wei et al 2015)
The cardiac cycle
Cardiac cycle is the way the human heart performs from the beginning of one heartbeat to
the beginning of the next (Lang et al 2015). The cycle is comprised of two different sessions;
the first one taking place when muscles of the heart are relaxed and it gets refilled with blood,