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→What changes the frequency of the heart?
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** The parasympathic system (nervus vagus) e.g. acetycholin decreases the frequency and atrioventricular conduction. The parasympathic system effects mainly the atria. | ** The parasympathic system (nervus vagus) e.g. acetycholin decreases the frequency and atrioventricular conduction. The parasympathic system effects mainly the atria. | ||
* Cardiac filling increases the frequency. | * Cardiac filling increases the frequency. | ||
* Also [[arrhythmias]] influence heart rate. | |||
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