What does this research mean for the field?

Blood flow velocity in normal human venae cavae exhibits marked cardiac pulsations that peak during ventricular systole and is significantly modulated by respiration, physical maneuvers, and exercise. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

This research aims to measure and analyze blood flow velocity in the venae cavae under various conditions, including respiration and maneuvers.

September 1, 1968Circulation ResearchOpen Access

Velocity of Blood Flow in Normal Human Venae Cavae

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Population

4 normal conscious subjects

Design

Other

Authors

LWLewis WexlerStanford University DBD. H. BergelUniversity of Oxford IGI. T. GabeMidhurst Community Hospital

Discussion

Member takes

Implication

May aid vena cava Doppler interpretation; leaves open validation in disease states.

Key Points

This research aims to measure and analyze blood flow velocity in the venae cavae under various conditions, including respiration and maneuvers.
Velocity was measured using a catheter-tip electromagnetic transducer in four normal conscious subjects.
Various factors such as respiration, Valsalva and Müller maneuvers, coughing, and exercise were systematically studied.
Peak blood velocities during ventricular systole were 30-45 cm/sec in the inferior vena cava and 10-35 cm/sec in the superior vena cava.
During abdominal breathing and the Müller maneuver, flow velocity reduction suggested inferior vena caval collapse.
Leg exercise led to an immediate increase in inferior caval flow velocity that remained elevated during recovery.

Structured PICO

Population

4 normal conscious subjects

Intervention

Measurement of caval blood velocity using a catheter-tip electromagnetic transducer during physiological maneuvers (respiration, Valsalva, Müller, coughing, exercise)

Outcome

Velocity of blood flow and pressure in the venae cavaesurrogate

This study provides baseline physiological data on blood flow velocity in the human venae cavae during various respiratory and physical maneuvers.

Cite This Study

Wexler et al. (1968) studied this question.

synapsesocial.com/papers/6a1bd5889dc17f23939cc522 https://doi.org/10.1161/01.res.23.3.349

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Velocity of Blood Flow in Normal Human Venae Cavae

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Velocity of Blood Flow in Normal Human Venae Cavae

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider