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Atrial natriuretic factor in hypovolemic tachycardia
M G Ziegler1, S R Shackford, K D Wilner
1University of California Medical Center, San Diego 92103.
Experientia
|September 15, 1987
Summary
Atrial natriuretic factor (ANF) release is stimulated by factors beyond atrial pressure, such as increased heart rate. This study in pigs suggests heart rate is a key factor in ANF secretion.
Area of Science:
- Cardiovascular Physiology
- Endocrinology
Background:
- Atrial natriuretic factor (ANF) is primarily known to be released due to increased right atrial pressure.
- The precise stimuli regulating ANF secretion are not fully elucidated.
Purpose of the Study:
- To investigate the relationship between hemodynamic changes and ANF release.
- To identify potential non-atrial stretch stimuli for ANF secretion.
Main Methods:
- Induction of hemorrhage in pigs to decrease atrial pressure.
- Electrical pacing to increase heart rate in pigs.
- Measurement of atrial pressures, heart rate, and ANF levels.
Main Results:
- Hemorrhage led to decreased atrial pressures, tachycardia, and elevated ANF levels.
- Electrical pacing resulted in increased heart rate and ANF levels.
- These findings indicate a correlation between heart rate and ANF release independent of atrial stretch.
Conclusions:
- Heart rate is a significant stimulus for atrial natriuretic factor release.
- ANF secretion can be modulated by factors other than atrial distension.