Histamine decreases left ventricular contractility in normal human subjects

D. J. Cooper, C. R. Thompson, K. R. Walley, R. P. Gillis, P. E. Wolinski-Walley, R. R. Schellenberg

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Abstract

To determine whether histamine alters human left ventricular contractility we measured heart rate, calibrated carotid arterial pressure, and left ventricular dimensions (echocardiogram) in nine healthy volunteers. We assessed baseline contractility using the end-systolic pressure-dimension relationship and the end-systolic meridional wall stress-rate-corrected velocity of circumferential fiber shortening relationship determined over a wide range of afterloads using phenylephrine and nitroprusside infusions. We then infused histamine for 3-5 min at a dose predetermined to decrease mean arterial pressure by 20%, both before and after H1 receptor antagonist pretreatment (diphenhydramine 50 mg iv). Histamine decreased end-systolic pressure but, unlike an equally hypotensive infusion of nitroprusside, did not decrease end-systolic dimension or increase fractional shortening. Histamine also decreased velocity of circumferential fiber shortening at the same end-systolic meridional wall stress as controls (P < 0.05). These effects of histamine were inhibited by H1 antagonist pretreatment. We conclude that the dominant effect of histamine on the human heart is to decrease left ventricular contractility and that this decrease in contractility is dependent, at least partially, on H1-receptor activation.

Original languageEnglish
Pages (from-to)2530-2537
Number of pages8
JournalJournal of Applied Physiology
Volume73
Issue number6
Publication statusPublished - 1 Dec 1992

Keywords

  • end-systolic pressure-dimension relationships
  • H antagonist
  • meridional wall stress
  • velocity of circumferential fiber shortening

Cite this

Cooper, D. J., Thompson, C. R., Walley, K. R., Gillis, R. P., Wolinski-Walley, P. E., & Schellenberg, R. R. (1992). Histamine decreases left ventricular contractility in normal human subjects. Journal of Applied Physiology, 73(6), 2530-2537.