What does this research mean for the field?

Pulmonary venous flow is pulsatile, characterized by rapid antegrade flow during right ventricular ejection and retrograde flow of lesser magnitude during left atrial contraction. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Determine pulmonary venous flow velocity patterns and assess how they correlate with mechanical events during ventricular and atrial contractions.

March 1, 1968Investigative Radiology

Flow Velocity Variations in the Pulmonary Veins of the Dog

Q: What is the clinical evidence from this study?

Study design: Other. Intervention: Cineradiographic study of injected oily contrast droplets. Primary outcome: Flow velocity variations in the pulmonary veins.

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Key result

Canine cineradiography reveals pulsatile pulmonary vein flow with antegrade RV and retrograde LA components.

n=12

Why the study?

The study aimed to characterize flow velocity variations in the pulmonary veins and their relation to ventricular and atrial contractions.

Population

12 dogs

Design

Cineradiographic study of injected oily contrast droplets

Authors

CFCarlos M. FerrarioPreventive Cardiology BMBj rn Nordenstr mKarolinska University Hospital SPSven PaulinCardiac Imaging

Discussion

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Implication

Should not change clinical practice; leaves open human relevance of pulsatile pulmonary vein flow.

Key Points

Determine pulmonary venous flow velocity patterns and assess how they correlate with mechanical events during ventricular and atrial contractions.
Conducted cineradiographic imaging of injected oily contrast droplets within the pulmonary veins of 12 canine models (N=12).
Calculated velocity curves from droplet displacement measurements and matched them to cardiac cycle phases.
Demonstrated pulsatile rather than continuous blood flow within the pulmonary veins across all 12 experiments.
Identified rapid antegrade flow synchronized with right ventricular ejection and a smaller retrograde flow during left atrial contraction.

PICO

Population

12 dogs undergoing cineradiographic studies to evaluate flow velocity variations in the pulmonary veins.

Intervention / Comparator

Cineradiographic study of injected oily contrast droplets

Primary Outcome

Flow velocity variations in the pulmonary veins

Cite This Study

Ferrario et al. (1968) studied this question. Cineradiographic study of injected oily contrast droplets was evaluated on Flow velocity variations in the pulmonary veins. Cineradiographic studies in 12 dogs demonstrated pulsatile pulmonary vein flow, with rapid antegrade flow during right ventricular ejection and retrograde flow during left atrial contraction.

synapsesocial.com/papers/6aab35d2ec7d720feaf32000 https://doi.org/10.1097/00004424-196803000-00001

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Flow Velocity Variations in the Pulmonary Veins of the Dog

Discussion

Member takes

Implication

Key Points

PICO

Cite This Study

Flow Velocity Variations in the Pulmonary Veins of the Dog

Discussion

Member takes

Implication

Key Points

PICO

Cite This Study

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Also Consider