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Bathmotropic action

Bathmotropic action (Greek bathmos – a step, a threshold + tropos – turn, the direction) – the influence of the noncardiac reasons leading to change of excitability of a cardiac muscle; divide on positive (increasing excitability) and negative (reducing excitability).

 
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Even if heart of the person does not fight, then he all the same can live during a long period, as the Norwegian fisherman Jan Revsdal showed us. Its "motor" stopped for 4 hours after the fisherman got lost and fell asleep in snow.