Hospitalized patients with acute decompensated heart failure: recognition, risk stratification, and treatment review

Single baseline serum creatinine measurements predict mortality in critically ill patients hospitalized for acute heart failure

Background

Acute heart failure (AHF) is a leading cause of death in critically ill patients and is often accompanied by significant renal dysfunction. Few data exist on the predictive value of measures of renal dysfunction in large cohorts of patients hospitalized for AHF.

Methods

Six hundred and eighteen patients hospitalized for AHF (300 male, aged 73.3 ± 10.3 years, 73% New York Heart Association Class 4, mean hospital length of stay 12.9 ± 7.7 days, 97% non‐ischaemic AHF) were included in a retrospective single‐centre data analysis. Echocardiographic data, serum creatinine/urea levels, estimated glomerular filtration rate (eGFR), and clinical/laboratory markers were recorded. Mean follow‐up time was 2.9 ± 2.1 years. All‐cause mortality was recorded, and univariate/multivariate analyses were performed.

Results

Normal renal function defined as eGFR > 90 mL/min/1.73 m² was noted in only 3% of AHF patients at baseline. A significant correlation of left ventricular ejection fraction with serum creatinine levels and eGFR (all P < 0.002) was noted. All‐cause mortality rates were 12% (90 days) and 40% (at 2 years), respectively. In a multivariate model, increased age, higher New York Heart Association class at admission, higher total cholesterol levels, and lower eGFR independently predicted death. Patients with baseline eGFR < 30 mL/min/1.73 m² had an exceptionally high risk of death (odds ratio 2.80, 95% confidence interval 1.52–5.15, P = 0.001).

Conclusions

In a large cohort of patients with mostly non‐ischaemic AHF, enhanced serum creatinine levels and reduced eGFR independently predict death. It appears that patients with eGFR < 30 mL/min/1.73 m² have poorest survival rates. Our data add to mounting data indicating that impaired renal function is an important risk factor for non‐survival in patients hospitalized for AHF.

Care of the lower extremities in patients with acute decompensated heart failure

Patients with heart failure and pulmonary edema are often admitted to the critical care unit. Many of these patients have severe peripheral edema, which may be associated with exudates and wounds of the lower extremities and which present a challenge to critical care nurses. Little information is available on treatment of peripheral edema in the intensive care unit or in patients with unstable hemodynamic status. Nursing care is based on available evidence, findings on chest radiographs, and hemodynamic status. Medications that contribute to peripheral edema should be evaluated and discontinued if possible. An appropriate mattress surface with an underpad that promotes wicking away of moisture should be selected. The patient's lower extremities should be elevated according to his or her current pulmonary status, and skin-protective interventions should be instituted. Multilayer compression wraps should be avoided until the patient's hemodynamic status is stable and the patient can get out of bed.

Non-symptom-related factors contributing to delay in seeking medical care by patients with heart failure: a narrative review

BACKGROUND

Delay in seeking timely medical care by patients with acute coronary syndrome and stroke has been well established in the literature, but less is known about delay in care-seeking behavior by patients with heart failure (HF). The purpose of this narrative review was to synthesize the literature regarding non-symptom-related factors that contribute to delay in seeking medical care for HF symptoms.

METHODS AND RESULTS

A literature search of Scopus, Medline, and Pubmed was conducted for published articles from database inception to July 2009. Available evidence has shown that non-symptom-related factors, such as HF severity, HF history, age, and ethnocultural background, were related to delay in certain studies; however, null results have also been reported. Other non-symptom-related factors, such as male gender, initial contact with a primary care physician, arriving in the emergency department by means other than ambulance, and patient responses such as self-care, low anxiety, and hopelessness, may play a role in longer delay.

CONCLUSIONS

Although this review identified several non-symptom-related factors that may be implicated in care-seeking delay, health care professionals should be vigilant in identifying all high-risk individuals and educating them about warning signs of HF. Moreover, access to outpatient chronic disease management programs that may have potential to reduce care-seeking delay behavior should be explored.

Malnutrition as assessed by nutritional risk index is associated with worse outcome in patients admitted with acute decompensated heart failure: an ACAP-HF data analysis

Malnutrition is common at hospital admission and tends to worsen during hospitalization. This controlled population study aimed to determine if serum albumin or moderate and severe nutritional depletion by Nutritional Risk Index (NRI) at hospital admission are associated with increased length of hospital stay (LOS) in patients admitted with acute decompensated heart failure (ADHF). Serum albumin levels and lymphocyte counts were retrospectively determined at hospital admission in 1740 consecutive patients admitted with primary and secondary diagnosis of ADHF. The Nutrition Risk Score (NRI) developed originally in AIDS and cancer populations was derived from the serum albumin concentration and the ratio of actual to usual weight, as follows: NRI = (1.519 × serum albumin, g/dL) + {41.7 × present weight (kg)/ideal body weight(kg)}. Patients were classified into four groups as no, mild, moderate or severe risk by NRI. Multiple logistic regressions were used to determine the association between nutritional risk category and LOS.

Three hundred and eighty-one patients (34%) were at moderate or severe nutritional risk by NRI score. This cohort had lower BMI (24 ± 5.6 kg/m²), albumin (2.8±0.5 g/dL), mean NRI (73.5±9) and lower eGFR (50±33 mL/min per 1.73 m²). NRI for this cohort, adjusted for age, was associated with LOS of 10.1 days. Using the Multiple Logistic regression module, NRI was the strongest predictor for LOS (OR 1.7, 95% CI: 1.58–1.9; P=0.005), followed by TIMI Risk Score [TRS] (OR 1.33, 95% CI: 1.03–1.71; P=0.02) and the presence of coronary artery disease (OR 2.29, 95%CI: 1.03–5.1; P=0.04). Moderate and severe NRI score was associated with higher readmission and death rates as compared to the other two groups.

Nutritional depletion as assessed by Nutritional Risk Index is associated with worse outcome in patients admitted with ADHF. Therefore; we recommend adding NRI to further risk stratify these patients.

Effect of adding nitroglycerin to early diuretic therapy on the morbidity and mortality of patients with chronic kidney disease presenting with acute decompensated heart failure

BACKGROUND

Loop diuretics are considered first-line therapy for patients with acute decompensated heart failure (ADHF). Adding nitroglycerin (NTG) to diuretic therapy for alleviation of acute shortness of breath has been advocated in our institution. We evaluated the benefits of adding NTG to diuretics in the emergency department for patients with ADHF and chronic kidney disease (CKD).

METHODS

430 consecutive patients with ADHF who were admitted with a chief complaint of dyspnea were included in this retrospective study. Patients were divided into 3 groups. Group A patients were treated with neither diuretics nor NTG; Group B patients were treated with diuretics only; and Group C patients were treated with both diuretics and NTG. Estimated glomerular filtration rate (GFR) was calculated according to the Cockcroft-Gault formula. Follow-up was 36 ± 9 (mean ± standard deviation [SD]) months. Primary endpoints were readmission rate at 30 days and mortality at 24 months.

RESULTS

430 patients were included in this study (42% men; age, 69 ± 14 [mean ± SD] years); mean New York Heart Association class was 2.4 ± 0.7 (mean ± SD) and mean ejection fraction was 28% ± 17% (mean ± SD). Group A included 257 (59%) patients, Group B had 127 (29%) patients, and Group C had 46 (11%) patients. Group C patients were older (mean age, 72 ± 13 years) with lower body mass index (26 ± 7 kg/m2), lower estimated GFR (55.8 ± 38 mL/min per 1.73 m2), higher B-type natriuretic peptide levels (1112 ± 876 pg/mL; P = nonsignificant [NS]), and higher systolic and diastolic blood pressures on admission (P = 0.001). The primary endpoint was assessed as a composite of all-cause mortality and ADHF readmission seen in 143 (56%) Group A patients, 68 (53%) Group B patients, and 22 (48%) Group C patients (P = NS). At 30 days there were 53 (12%) readmissions--26 in Group A, 20 in Group B, and 7 in Group C (P = NS). However, survival at 24 months was higher in Group C (87%) compared with Groups A (79%) and B (82%) (P = 0.002). Using the Cox proportional-hazards regression module, early administration of NTG and Lasix (95% confidence interval [CI], 1.06-1.62; P = 0.01) followed by CKD stage (95% CI, 1.00-1.35; P = 0.04) were the only predictors for survival.

CONCLUSION

There is a role for early administration of NTG in addition to diuretic therapy in patients admitted to the emergency department with ADHF, with resultant decreased length of stay and a trend toward a decrease in the composite endpoint of all-cause mortality and ADHF readmission. The mortality benefit at 2 years reported in our study is thought-provoking and raises a premise to be proven in randomized clinical trials.

Developing and Maintaining Competency with Circulatory Assist Devices: How to Meet the Challenge

Heart failure is the only cardiovascular disease that is increasing in prevalence in developing countries. As a result, circulatory assist devices are being used more both as a bridge to heart transplantation and as destination therapy in patients with a failing heart. Nurses must become knowledgeable about these options for their patients. Developing and maintaining competency can be challenging as more devices become available. The principles of adult learners were used by one academic medical center to set up a new circulatory assist program and to maintain ongoing competency among staff working with patients who have these devices.