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In vivo evidence that human atrial natriuretic factor-(99-126) (hANF) stimulates parasympathetic activity in man

S Zeuzem1, H G Olbrich, T Haak

  • 1Center of Internal Medicine, University Hospital, Johann Wolfgang Goethe-University, Frankfurt am Main, FRG.

In a double-blind study 8 healthy male subjects received 100 micrograms human atrial natriuretic facotr-(99-126) (hANF) and NaCl0.9% in random order on different days. Following hANF injection a significant increase in cardiac beat-to-beat variation was observed (4.65% vs 5.95%). This shows that in vivo human atrial natriuretic factor stimulates cardiac parasympathetic activity in man.

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