What question did this study set out to answer?

To explore how coronary blood flow is distributed across the ventricular wall during different intramyocardial pressures and maximal vasodilation.

October 1, 1975Experimental Biology and Medicine

The Transmural Distribution of Coronary Blood Flow During Maximal Vasodilation

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Population

Experimental model (specifics not stated in abstract)

Design

Preclinical

Authors

JDJ. M. DowneyUniversity of South Alabama EKEdward S. KirkUniversity of Illinois Urbana-Champaign

Discussion

Member takes

Implication

Does not support changes in managing myocardial perfusion; leaves open tachycardia's role in human transmural flow.

Key Points

To explore how coronary blood flow is distributed across the ventricular wall during different intramyocardial pressures and maximal vasodilation.
Experiments analyzed coronary blood flow during conditions of maximal vasodilation.
Conditions included minimized intramyocardial pressures (cardiac arrest) and maximized pressures (tachycardia).
A gradient of vascular resistance was identified, favoring subendocardial flow during maximal vasodilation.
Subendocardial flow favorability was confirmed when intramyocardial pressures were minimized.
The flow gradient reversed when tissue pressures were maximized through tachycardia.

Structured PICO

Population

Experimental model (specifics not stated in abstract)

Intervention

Maximal vasodilation under conditions of minimized intramyocardial pressure (cardiac arrest) or maximized intramyocardial pressure (tachycardia)

Outcome

Transmural distribution of coronary blood flowsurrogate

This preclinical study demonstrates that intramyocardial pressure dictates the transmural distribution of coronary blood flow during maximal vasodilation, with tachycardia reversing the normal subendocardial-favoring gradient.

Cite This Study

Downey et al. (1975) studied this question.

synapsesocial.com/papers/6a70b5fda528af2d65c3b0f0 https://doi.org/10.3181/00379727-150-39000

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The Transmural Distribution of Coronary Blood Flow During Maximal Vasodilation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

The Transmural Distribution of Coronary Blood Flow During Maximal Vasodilation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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