Dietary Self-management in Heart Failure: High Tech or High Touch?

The current state of evidence for sodium and fluid restriction in heart failure

The field of heart failure has evolved in terms of the therapies that are available including pharmaceutical and device therapies. There is now substantial randomized trial data to indicate that dietary sodium restriction does not provide the reduction in clinical events with accepted heterogeneity in the clinical trial results. Dietary sodium restriction should be considered for some but not all patients and with different objectives than clinical outcomes but instead for potential quality of life benefit. In addition, fluid restriction, once the mainstay of clinical practice, has not shown to be of any additional benefit for patients in hospital or in the ambulatory care setting and therefore should be considered to be used cautiously (if at all) in clinical practice. Further developments and clinical trials are needed in this area to better identify patients who may benefit or have harm from these lower cost interventions and future research should focus on large scale, high quality, clinical trials rather than observational data to drive clinical practice.

Evidence related to sodium restriction in patients with heart failure

OBJECTIVES

to analyze the scientific production about sodium restriction in patients with heart failure.

METHODS

integrative literature review from articles published from 2007 to 2017, located in the CINAHL and Scopus databases.

RESULTS

thirteen studies were analyzed. Sodium intake restriction was associated with lower unfavorable clinical outcomes in patients with marked symptomatology. The 24-hour urine sodium dosage was the main tool to assess adherence to the low sodium diet.

CONCLUSIONS

based on the studies included in this review, in symptomatic patients, dietary sodium restriction should be encouraged in clinical practice as a protective measure for health. However, in asymptomatic patients, it should be well studied.

Problems Experienced in the Second and Third Months After Discharge From a Heart Failure-Related Hospitalization

The purpose of this study was to identify high-priority problems experienced by individuals during the second and third month after discharge from an acute care facility for heart failure. This descriptive, exploratory study, an extension of a previous analysis that examined high-priority problems in the first month, comprised 19 participants who were assigned to an intervention group that received a randomized, 12-week-pilot coping partnership (COPE-HF) intervention. A trained research nurse provided the intervention, and participants used a standard list to identify high-priority heart failure-related problems. Quantitative and content data analysis was conducted. While the highest-priority problem continued to be managing their treatment regimens, the frequency of this problem lessened by week 12. Comorbidities emerged as a new problem in managing heart failure treatment and symptoms. Coping emerged as a new problem, as individuals with heart failure dealt with the impending morbidity of their diagnosis and how it would affect loved ones. Resource issues (ie, financial, social) became more prevalent for individuals with heart failure as potential and actual resources were depleted. Health providers should develop strategies to address these problems to improve outcomes in individuals with heart failure.

High salt induced hypertension leads to cognitive defect

Although increasing evidences suggest a relationship between hypertension and brain function for years, it is still unclear whether hypertension constitutes a risk factor for cognitive decline and its underlying mechanism. In the present study, an experimental animal model of hypertension simply by feeding rats with high salt diet was employed. We found that long-term high salt intake caused a marked increase of systolic blood pressure linked to a declined regional cerebral blood flow. Fear conditioning and morris water maze behavioral test revealed that high salt diet induced hippocampal dependent spatial reference memory deficits, while a decreased synaptogenesis without neuronal loss in hippocampus was observed in high salt treated rats. Furthermore, we found that high salt induced a decrease of intracellular calcium, which inactivated CaMK II and resulted in dephosphorylation of CREB at Ser133. These findings suggest a novel etiopathogenic mechanism of cognitive deficit induced by hypertension, which is initiated by high salt diet.