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QT variability in amyloidosis of familial Mediterranean fever

Udi Nussinovitch1, Ilan Ben-Zvi, Avi Livneh

  • 1Israel Naval Medical Institute, Israel Defense Forces Medical Corps, Haifa, Israel.

The Israel Medical Association Journal : IMAJ
|June 9, 2012
PubMed
Abstract

Insights

Familial Mediterranean Fever (FMF) with amyloidosis shows higher QT variability index (QTVI), a marker of heart rhythm issues. This finding may indicate increased arrhythmia risk in these patients.

Area of Science:

  • Cardiology
  • Genetics
  • Internal Medicine

Background:

  • Familial Mediterranean Fever (FMF) is a genetic autoinflammatory disorder.
  • The link between FMF and ventricular arrhythmias is not well-established.
  • Amyloidosis is a potential complication of FMF, affecting organs including the heart.

Purpose of the Study:

  • To assess QT variability index (QTVI) and other repolarization markers in FMF patients with amyloidosis.
  • To investigate potential arrhythmogenic markers in FMF-associated amyloidosis.
  • To compare repolarization markers between FMF amyloidosis patients and healthy controls.

Main Methods:

  • The study included 12 FMF patients with amyloidosis and 14 healthy controls.
  • QT measurements were performed using computerized software.
  • QT variability index (QTVI) and other repolarization parameters were analyzed.

Main Results:

  • No significant differences in QTc or power spectral analysis of QT variability were observed between groups.
  • QTVI was significantly higher in FMF amyloidosis patients compared to healthy controls (P=0.02).
  • Hypertension was more prevalent in the FMF amyloidosis group.

Conclusions:

  • Amyloidosis associated with FMF is linked to an elevated QTVI.
  • The clinical significance and prognostic value of increased QTVI in this population require further investigation.
  • The findings suggest a potential association between FMF amyloidosis and cardiac repolarization abnormalities.

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