Response of coronary blood flow to some natural stresses of excitement in the conscious dog

✍ Scribed by G. Marchetti; L. Merlo; V. Noseda

• Publisher: Springer
• Year: 1968
• Tongue: English
• Weight: 671 KB
• Volume: 298
• Category: Article
• ISSN: 0031-6768
• DOI: 10.1007/bf00362599

✦ Synopsis

The effect on aortic pressure, phasic coronary blood flow and heart rate of some natural stimuli has been investigated in conscious dogs in which electromagnetic itowmeters were chronically implanted on the coronary vessels.

All the tested stimulations (sight and ingestion of food, sexual excitement, auditory and cold stimuli, spontaneous excitement) give rise to a marked increase in the coronary blood flow. Aortic pressure and heart rate also increase though f~ a lesser extent.

In the same animals Adrenalin, Noradrenalin and Isopropylnoradrcnalin were administered by intravenous route.

The results obtained show some analogies with those observed after the tested stimulations.

These latter are also resembling to those reported by Gm~ZCATA et al. following electrical stimulation of sympathetie nervous system.

It could therefore suggested that the natural stresses of excitement may result both in considerable activation of sympathetic nerves, and release of cateeholamines in the blood stream.