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Prognostic implications of relative hypochromia in ambulatory patients with chronic systolic heart failure

Cesar Simbaqueba1, Kevin Shrestha, Maria Patarroyo

  • 1Department of Medicine, Fairview Health Services, Minneapolis, MN, USA.

Congestive Heart Failure (Greenwich, Conn.)
|January 3, 2013
PubMed

Insights

Low mean corpuscular hemoglobin concentration (MCHC), indicating red blood cell hypochromia, is linked to worse outcomes in heart failure patients. This finding is significant even without anemia, highlighting MCHC as a key indicator.

Area of Science:

  • Cardiology
  • Hematology
  • Clinical Medicine

Background:

  • Iron deficiency is linked to heart failure.
  • The impact of reduced erythrocyte hemoglobin content (MCHC) on heart failure outcomes is not well-established.

Purpose of the Study:

  • To investigate the association between mean corpuscular hemoglobin concentration (MCHC) and myocardial structure, performance, and long-term clinical outcomes in patients with chronic systolic heart failure.

Main Methods:

  • Analysis of hematologic data and long-term outcomes in 197 ambulatory patients with chronic systolic heart failure.
  • Comprehensive echocardiographic evaluation.
  • Statistical analysis adjusting for age, LVEF, eGFR, and NYHA class.

Main Results:

  • Low MCHC (relative hypochromia) correlated with higher NT-proBNP and lower eGFR.
  • Low MCHC showed modest correlation with diastolic dysfunction but not LVEF.
  • Lower MCHC levels were associated with a higher risk of death, transplant, or heart failure hospitalization after 5 years.
  • This association was particularly pronounced in patients with hemoglobin above the median.

Conclusions:

  • Relative hypochromia, indicated by low MCHC, is an independent predictor of adverse outcomes in chronic systolic heart failure.
  • Physicians should consider MCHC levels, especially in the absence of anemia, for risk stratification in heart failure patients.

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