Key result
In dogs, the product of systolic right atrial pressure and heart rate was the strongest determinant of plasma ANF release (r2 = 0.75), indicating atrial tension during systole drives ANF release.
Population
5 anaesthetized, closed-chest dogs
Comparison
Blood volume expansion at three levels and… vs Control levels of blood volume and heart rate
Design
Preclinical
Authors
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Supports systolic atrial tension as ANF driver in dogs; leaves open human relevance and therapeutic implications.
Effect estimate: r2 = 0.75
Atrial tension or stress developing during atrial systole, rather than atrial distension, is a key determinant of atrial natriuretic factor release.
Christensen et al. (1988) studied Anaesthetized, closed-chest dogs (n=5). Blood volume expansion and pacing tachycardia vs. Baseline/control levels was evaluated on Plasma immunoreactive (IR) ANF levels and correlation with atrial pressures and heart rate (r2 = 0.75). In dogs, the product of systolic right atrial pressure and heart rate was the strongest determinant of plasma ANF release (r2 = 0.75), indicating atrial tension during systole drives ANF release.
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