Related Experiment Videos
[Systemic vascular reactions to increases in total blood flow]
Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
|October 1, 1980
Summary
Anesthetized cats showed reflex vasodilation when pulsatile blood flow increased and vasoconstriction when it decreased. Both reflex and myogenic factors influenced resistance vessel responses during pulsatile perfusion.
Area of Science:
- Cardiovascular Physiology
- Autonomic Nervous System Regulation
- Vascular Biology
Context:
- Investigating vasomotor responses in anesthetized cats undergoing left ventricular bypass.
- Examining the effects of altered systemic blood flow on vascular tone.
- Understanding the interplay of reflex and myogenic mechanisms in vascular regulation.
Purpose:
- To elucidate the vasomotor reactions to acute changes in systemic blood flow during left ventricular bypass.
- To differentiate between reflex and myogenic contributions to vascular tone.
- To explore the inhibition of systemic myogenic vascular tone.
Summary:
- Increased pulsatile blood flow induced reflex vasodilation, while a decrease triggered a vasoconstrictor reflex in cats with left ventricular bypass.
- Resistance vessels exhibited opposing reflex and myogenic factors in response to systemic flow changes during pulsatile perfusion.
- The study discusses the inhibition of systemic myogenic vascular tone when pressure and flow pulse alterations are absent.
Impact:
- Provides insights into the complex regulation of vascular tone during altered hemodynamic conditions.
- Contributes to understanding the mechanisms underlying cardiovascular reflexes.
- Informs potential therapeutic strategies targeting vascular dysfunction.