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Related Experiment Video

Updated: Aug 15, 2025

Demystifying Venous Excess Ultrasound (VExUS): Image Acquisition and Interpretation

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Hyperviscosity syndrome revisited.

Debasree Gangopadhyay¹, Mahua Roy¹, Somrita Laha¹

¹Department of Pediatric Cardiology, Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, West Bengal, India.

Annals of Pediatric Cardiology

|January 2, 2023

Summary

This summary is machine-generated.

Secondary erythrocytosis in cyanotic heart disease causes hyperviscosity, leading to serious complications like stroke. Management involves hydration, iron correction, and sometimes phlebotomy to improve blood flow and reduce risks.

Keywords:

Cyanotic congenital heart disease grown-up congenital heart hyperviscosity syndrome iron deficiency phlebotomy secondary erythrocytosis

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Area of Science:

Cardiology
Hematology
Physiology

Background:

Cyanotic heart disease triggers secondary erythrocytosis due to chronic hypoxia.
This erythrocytosis leads to hyperviscosity, increasing risks of microvascular stasis and thrombosis.
Iron deficiency further exacerbates red blood cell rigidity and vascular occlusion.

Purpose of the Study:

To detail the pathophysiology, clinical features, and management of hyperviscosity syndrome in patients with uncorrected cyanotic congenital heart disease.
To present a case series illustrating the spectrum of hyperviscosity complications.

Main Methods:

Review of four patients with uncorrected cyanotic congenital heart disease.
Analysis of clinical presentations related to hyperviscosity.
Discussion of established and potential management strategies.

Main Results:

Patients presented with a range of hyperviscosity symptoms, including neurological and visual disturbances.
Overt thrombosis, such as cerebrovascular accident and myocardial infarction, is a significant risk.
Iron-deficient microcytic cells worsen vascular occlusion due to reduced deformability.

Conclusions:

Hyperviscosity syndrome is a serious complication of secondary erythrocytosis in cyanotic heart disease.
Management priorities include hydration, iron repletion, and considering therapeutic phlebotomy for persistent symptoms.
Prompt recognition and management are crucial to prevent severe thrombotic events.