Key result
Chronic heart failure significantly reduced capillary red blood cell velocity during muscle contractions in rats compared to controls (222 vs 428 microm/s, P<0.05).
Why the study?
Does chronic heart failure impair skeletal muscle capillary hemodynamics at rest and during contractions in a rat model?
Population
Rat model of chronic heart failure (CHF) vs control (C) spinotrapezius muscle
Comparison
Muscle contractions vs Control (C) spinotrapezius muscle
Design
Preclinical
Authors
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May not yet inform CHF management; hypothesis-generating for impaired muscle O2 delivery in human exercise intolerance.
Does chronic heart failure impair skeletal muscle capillary hemodynamics at rest and during contractions in a rat model?
Absolute Event Rate: 222% vs 428%
p-value: p=<0.05
Chronic heart failure impairs diffusive and conductive O2 delivery across the rest-to-contractions transition in rat skeletal muscle, which may explain the slowed O2 uptake on-kinetics seen in CHF patients.
Richardson et al. (2003) studied Chronic heart failure. Chronic heart failure (disease model) vs. Healthy control was evaluated on Capillary red blood cell velocity (VRBC) during contractions (p=<0.05). Chronic heart failure significantly reduced capillary red blood cell velocity during muscle contractions in rats compared to controls (222 vs 428 microm/s, P<0.05).
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