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Cardiovascular function and dysfunction in sickle cell anemia

L Julian Haywood1

  • 1Department of Medicine (Cardiology), Los Angeles County+University of Southern California Medical Center, CA 90033, USA. jhaywood@hsc.usc.edu

Journal of the National Medical Association
|February 28, 2009
PubMed

Insights

Sickle cell anemia (SCA) impacts the heart, causing enlarged heart and myocardial ischemia due to anemia and blood viscosity. Key mortality risks include hypertension and pulmonary hypertension.

Area of Science:

  • Hematology
  • Cardiology
  • Pathophysiology

Background:

  • Sickle cell anemia (SCA) was identified in 1910 and remains a significant clinical entity.
  • SCA presents complex pathophysiologic mechanisms, particularly concerning cardiopulmonary and circulatory systems.
  • Understanding SCA's cardiovascular impact is crucial for patient outcomes.

Purpose of the Study:

  • To review the pathophysiologic mechanisms of cardiopulmonary and circulatory disorders in sickle cell anemia.
  • To highlight the relationship between SCA and cardiac complications such as cardiomegaly and myocardial ischemia.
  • To identify mortality risk factors associated with sickle cell anemia.

Main Methods:

  • Review of existing data and literature on sickle cell anemia and its cardiovascular manifestations.
  • Analysis of pathophysiologic pathways linking anemia, blood viscosity, and cardiac dysfunction.
  • Identification of clinical factors contributing to mortality in SCA patients.

Main Results:

  • Cardiomegaly in SCA is linked to increased cardiac workload from anemia.
  • Myocardial ischemia results from severe anemia, microthrombi, and increased blood viscosity.
  • Sudden death can occur due to myocardial infarction or rhythm disturbances; hypertension and pulmonary hypertension are key mortality risks.

Conclusions:

  • Sickle cell anemia significantly affects cardiovascular health, leading to conditions like cardiomegaly and myocardial ischemia.
  • Early identification and management of risk factors such as hypertension are vital for improving survival in SCA patients.
  • Continued research into SCA's complex mechanisms is essential for developing effective therapeutic strategies.

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