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Cardiac abnormalities associated with hydrops fetalis

T K Knilans1

  • 1Department of Pediatrics and Medicine, University of Cincinnati College of Medicine, OH, USA.

Seminars in Perinatology
|December 1, 1995
PubMed
Summary

Cardiovascular issues, including structural defects and arrhythmias, are linked to 26% of hydrops fetalis cases. Fetal tachyarrhythmias are the most treatable cardiac cause, offering a better prognosis for affected infants.

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Area of Science:

  • Perinatology
  • Fetal Cardiology
  • Pediatric Cardiology

Background:

  • Hydrops fetalis is a serious condition characterized by excessive fluid accumulation in fetal tissues and organs.
  • Cardiovascular abnormalities represent a significant, though not fully understood, etiology in a notable percentage of hydrops fetalis cases.

Purpose of the Study:

  • To review the spectrum of cardiovascular abnormalities associated with hydrops fetalis.
  • To elucidate the mechanisms by which cardiac conditions lead to hydrops fetalis.
  • To assess the treatability and prognostic implications of cardiac causes of hydrops fetalis.

Main Methods:

  • Literature review of modern era case reports and studies on hydrops fetalis and associated cardiovascular conditions.
  • Analysis of reported cardiovascular abnormalities, including structural defects, arrhythmias, tumors, and inflammatory/ischemic conditions.
  • Evaluation of proposed pathophysiological mechanisms linking cardiac dysfunction to hydrops fetalis.

Main Results:

  • Cardiovascular abnormalities are identified in 26% of hydrops fetalis cases.
  • Associated conditions range from structural lesions to arrhythmias, tumors, myopathy, infection, infarction, and arterial calcification.
  • Lesions causing right atrial pressure/volume overload and fetal tachyarrhythmias are strongly associated with hydrops fetalis.

Conclusions:

  • Cardiac abnormalities are a significant cause of hydrops fetalis, acting through mechanisms like volume overload and impaired cardiac function.
  • Fetal tachyarrhythmias represent the most treatable cardiac etiology, offering a potential for improved outcomes.
  • While bradyarrhythmias are less commonly implicated and harder to treat, a comprehensive cardiac evaluation is crucial for managing hydrops fetalis.

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