Vitamin D in chronic heart failure.
Study Goal
The researchers aimed to explore the potential mechanisms by which vitamin D (and indirectly calcium handling) might influence heart failure pathophysiology.
Results Summary
The study found observational links between low vitamin D levels and worse heart failure outcomes but noted insufficient interventional data to support vitamin D supplementation, even in deficient patients. No direct conclusions about calcium's efficacy were drawn.
Population
Patients with heart failure.
Effective Dosage
Not specified
Duration
Not specified
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
vitamin D | increase | pathophysiology of heart failure | - | - | may positively influence | #1 |
vitamin D | increase | renin-angiotensin system | - | - | actions on | #2 |
vitamin D | increase | calcium handling | - | - | actions on | #3 |
vitamin D | decrease | proinflammatory cytokines | - | - | reduction of | #4 |
vitamin D | increase | endothelial function | - | - | improvements in | #5 |
vitamin D | increase | blood pressure | - | - | improvements in | #6 |
low vitamin D levels | neutral | - | patients with heart failure | - | are common in | #7 |
low vitamin D levels | decrease | exercise capacity | patients with heart failure | - | are associated with worse | #8 |
low vitamin D levels | increase | natriuretic peptide levels | patients with heart failure | - | are associated with worse | #9 |
vitamin D supplementation | no change | - | patients with low vitamin D levels | - | evidence to date does not support | #10 |
larger doses of vitamin D given over a longer period of time | decrease | symptoms | heart failure | - | can reduce | #11 |
larger doses of vitamin D given over a longer period of time | decrease | hospitalization | heart failure | - | can reduce | #12 |
larger doses of vitamin D given over a longer period of time | decrease | mortality | heart failure | - | can reduce | #13 |
Recent evidence suggests a number of mechanisms whereby vitamin D may positively influence the pathophysiology of heart failure. These include actions on the renin-angiotensin system, calcium handling, reduction of proinflammatory cytokines, and improvements in endothelial function and blood pressure. Observational data suggest that low vitamin D levels are common in patients with heart failure and are associated with worse exercise capacity and natriuretic peptide levels. Little interventional data are currently available, but evidence to date does not support vitamin D supplementation, even in patients with low vitamin D levels. Further studies are needed to establish whether larger doses of vitamin D given over a longer period of time can reduce symptoms, hospitalization, and mortality in heart failure.