Related Experiment Videos
High plasma antidiuretic hormone in patients with cardiac failure: influence of age
Insights
Patients with cardiac failure exhibit elevated antidiuretic hormone (ADH) levels, even with low plasma osmolality, suggesting inappropriate ADH release. This elevation appears linked to increased hormone release rather than reduced breakdown in heart failure patients.
Area of Science:
- Endocrinology
- Cardiology
- Nephrology
Background:
- Elevated antidiuretic hormone (ADH) is observed in various clinical conditions.
- The role of ADH dysregulation in cardiac failure requires further elucidation.
- Age-related changes in ADH levels are documented in healthy individuals.
Purpose of the Study:
- To investigate plasma ADH levels in patients with cardiac failure compared to healthy subjects.
- To determine the relationship between plasma ADH, age, plasma osmolality, and renal function in cardiac failure.
- To explore the mechanisms underlying elevated ADH in cardiac failure, focusing on release versus catabolism.
Main Methods:
- Plasma ADH, sodium, osmolality, and creatinine levels were measured.
- Subjects included patients with cardiac failure and healthy controls, stratified by age.
- Covariance analysis was employed to adjust for age differences.
Main Results:
- Plasma ADH was significantly higher in cardiac failure patients than in controls, irrespective of age.
- Cardiac patients exhibited lower plasma sodium and osmolality, indicating inappropriate ADH secretion.
- Plasma creatinine was higher in patients and older individuals, but showed no correlation with ADH levels.
Conclusions:
- Cardiac failure is associated with inappropriately elevated plasma ADH, likely due to augmented release.
- The findings suggest that ADH elevation in cardiac failure is not primarily caused by impaired renal catabolism.
- Etiology, disease severity, duration, and diuretic treatment did not show a clear influence on ADH levels.
Abstract:
Plasma antidiuretic hormone (ADH) was greater in patients with cardiac failure than in healthy subjects. Plasma ADH increased significantly with age in both groups. Covariance analysis showed that the difference between patients and controls occurred whatever the age. Plasma sodium and plasma osmolality were lower in cardiac patients than in healthy subjects. This showed that increase in plasma ADH observed in patients was inappropriate since it coexisted with inhibitory levels of plasma osmolality. Plasma creatinine was greater in cardiac patients than in healthy subjects and for each group in elderly than in young people. But there was no significant correlation between plasma ADH and creatinine. This suggested that increase in plasma ADH observed in cardiac failure was due more to an augmented release than to a diminished catabolism. No clear influence of etiology, severity, length of the disease and treatment with diuretics could be demonstrated.