Cholinergic stimulation with pyridostigmine blunts the cardiac responses to mental stress

Clin Auton Res. 1999 Feb;9(1):11-6. doi: 10.1007/BF02280691.

Abstract

Mental stress may induce myocardial ischemia and ventricular arrhythmia in patients with coronary artery disease, and cholinergic stimulation is a potential protective mechanism. The purpose of this study was to determine the effect of pyridostigmine bromide (PYR), a reversible cholinesterase inhibitor, on the cardiac responses to a mental stress challenge. Twelve healthy young volunteers were submitted to a mental stress test (arithmetic test) 2 hours after the oral administration of either placebo or PYR (45 mg) on two separate days, following a randomized crossover double-blind protocol. Heart rate was reduced after both placebo and PYR (p < 0.05), but the cardiac responses to the mental stress were lower with PYR (p < 0.05): mean RR interval (mean +/- SE)-placebo: 730 +/- 19 msec; PYR: 769 +/- 21 msec; Peak systolic pressure-placebo: 129 +/- 4 mmHg; PYR: 124 +/- 3 mmHg; Peak diastolic pressure-placebo: 92 +/- 3 mmHg; PYR: 89 +/- 4 mmHg; Mean rate-pressure product-placebo: 10,496 +/- 412 bpm x mmHg; PYR: 9,746 +/- 383 bpm x mmHg. In conclusion, 45 mg of pyridostigmine blunted the pressor and chronotropic responses to mental stress in healthy young subjects.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Blood Pressure / drug effects
  • Cholinergic Agonists / pharmacology*
  • Cholinesterases / blood
  • Female
  • Heart / drug effects*
  • Heart / physiopathology*
  • Heart Rate / drug effects
  • Humans
  • Male
  • Pyridostigmine Bromide / pharmacology*
  • Stress, Psychological / physiopathology*
  • Time Factors

Substances

  • Cholinergic Agonists
  • Cholinesterases
  • Pyridostigmine Bromide