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Cardiorespiratory synchronism (CRS) shows that at the breathing frequency, which as usual exceeds the baseline heart rhythm, the heart makes one contraction per each breathing. It is shown that CRS arises as a result of reproduction by the heart the rhythm of signals, coming to the heart via vagus nerves. CRS characterized by the synchronization range,… (More)
The cat heart rate responded with a systole to a burst stimulation of the sinocarotid nerve. A change of the stimulation frequency entailed a respective change in the systole frequency within the range 179.2 +/- 1.3-173.2 +/- 1.5 systoles per minute.