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Hemoglobin Kinetics and Long-term Prognosis in Heart Failure
Carles Díez-López1, Josep Lupón2, Marta de Antonio1
1Unitat d'Insuficiència Cardíaca, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain.
Insights
Anemia negatively impacts heart failure outcomes. Persistent and new-onset anemia significantly increase mortality risk, while transient anemia also shows a concerning trend.
Area of Science:
- Cardiology
- Hematology
Background:
- The prognostic impact of hemoglobin kinetics in heart failure patients remains unclear.
- Understanding anemia's role is crucial for improving heart failure management.
Purpose of the Study:
- To investigate the association between hemoglobin levels, anemia classification, and mortality in patients with heart failure.
- To determine if different patterns of anemia (persistent, transient, new-onset) have varying effects on heart failure outcomes.
Main Methods:
- Hemoglobin levels were measured at baseline and 6 months in 1173 heart failure patients.
- Patients were categorized into nonanemic, transiently anemic, newly anemic, or permanently anemic groups based on WHO criteria.
- Outcomes, including all-cause mortality, were assessed over a mean follow-up of 3.7 years.
Main Results:
- Anemia was prevalent, with 32.4% of patients having persistent anemia and 12.5% developing new-onset anemia.
- Both persistent anemia (HR=1.62) and new-onset anemia (HR=1.39) were independent predictors of increased all-cause mortality.
- Transient anemia also suggested a trend towards higher mortality (HR=1.31), though not statistically significant.
Conclusions:
- Anemia is a significant negative prognostic factor in heart failure.
- Persistent and new-onset anemia are particularly detrimental, highlighting the need for monitoring and intervention.
- Even transient anemia may warrant clinical attention in heart failure management.
Introduction And Objectives:
The influence of hemoglobin kinetics on outcomes in heart failure has been incompletely established.
Methods:
Hemoglobin was determined at the first visit and at 6 months. Anemia was defined according to World Health Organization criteria (hemoglobin < 13g/dL for men and hemoglobin < 12g/dL for women). Patients were classified relative to their hemoglobin values as nonanemic (both measurements normal), transiently anemic (anemic at the first visit but not at 6 months), newly anemic (nonanemic initially but anemic at 6 months), or permanently anemic (anemic in both measurements).
Results:
A total of 1173 consecutive patients (71.9% men, mean age 66.8±12.2 years) were included in the study. In all, 476 patients (40.6%) were considered nonanemic, 170 (14.5%) had transient anemia, 147 (12.5%) developed new-onset anemia, and 380 (32.4%) were persistently anemic. During a follow-up of 3.7±2.8 years after the 6-month visit, 494 patients died. On comprehensive multivariable analyses, anemia (P < .001) and the type of anemia (P < .001) remained as independent predictors of all-cause mortality. Compared with patients without anemia, patients with persistent anemia (hazard ratio [HR] = 1.62; 95% confidence interval [95%CI], 1.30-2.03; P < .001) and new-onset anemia (HR = 1.39; 95%CI, 1.04-1.87, P = .03) had higher mortality, and even transient anemia showed a similar trend, although without reaching statistical significance (HR = 1.31; 95%CI, 0.97-1.77, P = .075).
Conclusions:
Anemia, especially persistent and of new-onset, and to a lesser degree, transient anemia, is deleterious in heart failure.
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