What question did this study set out to answer?

To measure right atrial, pulmonary arterial, and pulmonary artery wedge pressures in horses during standing rest and graded treadmill exercise.

January 1, 1993American Journal of Veterinary Research

Pulmonary artery wedge pressure increases with high-intensity exercise in horses

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To measure right atrial, pulmonary arterial, and pulmonary artery wedge pressures in horses during standing rest and graded treadmill exercise.
Evaluated 8 horses instrumented with catheter-mounted microtip manometers.
Recorded hemodynamics while standing quietly at rest and galloping at treadmill belt speeds of 8, 10, and 13 m/s.
Treadmill exercise at 8 m/s significantly increased heart rate, right atrial pressure, pulmonary artery pressures, and pulmonary artery wedge pressure (P < 0.05), with further significant increments at 10 and 13 m/s (P < 0.05).
At 13 m/s, mean pulmonary artery pressure reached 89 ± 5 mm Hg and pulmonary artery wedge pressure reached 56 ± 4 mm Hg, compared to resting values of 31 ± 2 mm Hg and 18 ± 2 mm Hg, respectively.
Calculated mean pulmonary capillary pressure approached 72.5 mm Hg at 13 m/s, with transmural pressures across capillaries likely exceeding this value due to large negative pleural pressure swings.

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Implication

Physiological study demonstrates marked increases in pulmonary vascular pressures in galloping horses, suggesting extreme capillary transmural pressure during maximal exercise.

Cite This Study

Murli Manohar (1993) studied this question.

synapsesocial.com/papers/6a9e67de5c13678b340681ea https://doi.org/10.2460/ajvr.1993.54.01.142

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Implication

Physiological study demonstrates marked increases in pulmonary vascular pressures in galloping horses, suggesting extreme capillary transmural pressure during maximal exercise.

Pulmonary artery wedge pressure increases with high-intensity exercise in horses

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Discussion

Implication

Cite This Study

Pulmonary artery wedge pressure increases with high-intensity exercise in horses

Key Points

Discussion

Implication

Cite This Study

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