What does this research mean for the field?

Diastolic coronary artery pressure-flow relationships are significantly influenced by coronary vascular capacitance during continuous pressure changes, and when capacitance effects are minimized, flow regulation depends on coronary vasomotor tone in a manner consistent with a vascular waterfall model. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

This study aims to investigate how initial coronary artery pressure affects the diastolic pressure-flow relationships in dogs.

September 1, 1982Circulation Research

Influence of autoregulation and capacitance on diastolic coronary artery pressure-flow relationships in the dog.

View Full Paper

Ask AI

Bookmark

Why the study?

Does initial coronary artery pressure influence diastolic coronary artery pressure-flow relationships in a canine model?

Population

22 closed-chest, anesthetized dogs

Comparison

Alteration of initial coronary artery pressure… vs Basal conditions (autoregulating state)

Design

Preclinical

Authors

WDWilliam P. DoleNovartis (United States)VBV. S. BishopBishop's University

Discussion

Member takes

Implication

Initial coronary pressure alters canine diastolic pressure-flow relations; supports vascular waterfall model but leaves human translation open.

Key Points

This study aims to investigate how initial coronary artery pressure affects the diastolic pressure-flow relationships in dogs.
Conducted experiments on 22 closed-chest anesthetized dogs under basal conditions and after maximum coronary vasodilation.
Utilized pressurized arterial reservoir cannulated into carotid artery to measure diastolic pressure-flow relationships.
Pressure-flow curves were analyzed under gradual and constant pressure conditions.
Under autoregulation, increases in pressure from 75 to 125 mm Hg significantly decreased the slope of pressure-flow curves (P < 0.01).
Maximum coronary vasodilation increased the slope significantly to 4.7 (P < 0.001) while lowering the zero flow pressure intercept to 15.2 mm Hg (P < 0.001).
Constant pressure conditions resulted in 10-25% lower slopes (P < 0.01) and 8-12 mm Hg lower zero flow pressure intercepts (P < 0.01).

Structured PICO

Does initial coronary artery pressure influence diastolic coronary artery pressure-flow relationships in a canine model?

Population

22 closed-chest, anesthetized dogs

Intervention

Alteration of initial coronary artery pressure (from 75 to 125 mm Hg) and maximum coronary vasodilation with intracoronary adenosine

Comparator

Basal conditions (autoregulating state)

Outcome

Diastolic coronary artery pressure-flow relationships (slope and zero flow pressure intercept)surrogate

Diastolic coronary artery pressure-flow relations are influenced by coronary vascular capacitance and vasomotor tone, consistent with a vascular waterfall model of diastolic flow regulation.

Cite This Study

Dole et al. (1982) studied this question.

synapsesocial.com/papers/6a1be446c97d63156a5f118f https://doi.org/10.1161/01.res.51.3.261

View Full Paper

Ask AI

Bookmark

Implication

Initial coronary pressure alters canine diastolic pressure-flow relations; supports vascular waterfall model but leaves human translation open.

Influence of autoregulation and capacitance on diastolic coronary artery pressure-flow relationships in the dog.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Influence of autoregulation and capacitance on diastolic coronary artery pressure-flow relationships in the dog.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider