BackgroundCardiorenal anemia syndrome (CRAS) is an evolving global epidemic associated with increased morbimortality and cost of care. The management of patients with CRAS remains a challenging undertaking worldwide and the lack of evidence-based clinical guidelines adds to the challenge. We aimed to explore the prevalence and survival rates of heart failure patients with CRAS in Tanzania.MethodsWe screened 789 patients and consecutively recruited 463 who met the inclusion criteria. Each participant underwent an interview, physical examination, anthropometric measurements, anemia, renal functions and echocardiographic assessment. All participants were followed until death or for up-to 180 days, whichever came first. Bivariate comparison and subsequent Cox proportional-hazards regression model were used to compare the CRAS and non-CRAS groups with respect to the primary end point.ResultsThe mean age of participants was 46.4 ± 18.9 years, and 56.5% were women. Overall, 51.9% of participants had renal insufficiency, 72.8% were anemic and 44.4% had CRAS. During a mean follow-up of 103 ± 75 days, 57.8% of participants died. Patients with CRAS displayed a higher mortality rate (73.5%) compared to those free of CRAS (45.8%), (p < 0.001). During multivariate analysis in a cox regression model of 21 potential predictors of mortality; renal dysfunction (HR 1.9; 95% CI 1.0–3.5; p = 0.03), severe anemia (HR 1.8; 95% CI 1.0–3.1; p = 0.04), hyponatremia (HR 2.2; 95% CI 1.3–3.7; p = 0.004) and rehospitalization (HR 4.3; 95% CI 2.2–8.4; p < 0.001) proved to be the strongest factors.ConclusionCardiorenal anemia syndrome is considerably prevalent and is associated with an increase in mortality amongst patients with heart failure. In view of this, timely, aggressive and collaborative measures to improve renal functions and/or correct anemia are crucial in the management of CRAS patients. Furthermore, these findings call for guideline committees to revise and/or develop evidence-based recommendations for management of patients with CRAS.Electronic supplementary materialThe online version of this article (doi:10.1186/s12872-017-0497-2) contains supplementary material, which is available to authorized users.

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The concept of cardiac critical care is emerging as a tool in the management of cardiovascular diseases in many Sub-Saharan African countries. The region is undergoing significant epidemiological transition. There remains a significant burden of infectious and nutritional disease, but cardiovascular disease, notably hypertension and coronary artery disease, as well as other noncommunicable diseases (NCD) are emerging rapidly, placing a double burden on existing healthcare systems. Within this complex, heterogeneous, and changing epidemiologic setting, efforts to diagnose and treat cardiovascular diseases have increased. As more patients are diagnosed with acute cardiac conditions, the number requiring management in a cardiac critical care unit is also increasing. In this review, using the Tanzanian experience, we attempt to chronicle the appearance of cardiac critical care services and the many challenges to their implementation in a resource-limited environment.

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