SQTS

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There is controversy whether short QT intervals are associated with sudden death. One trial found QTc intervals < 300ms to be associated with sudden death.[1] However, a recent Finnish study in a random selection of healthy subjects (n=10 822) did not find an increased incidence of sudden death in patients with short QTc intervals. They defined QTc < 320ms as 'very short' and QTc < 340ms as 'short'. In total, 15 deaths occured in the group with QTc <340ms, with only one possible sudden death (cause of death unknown). They used Friderica's method for QTc correction: 100px.[2] They conclude that the ECG is not a good screening tool to find patients with a short QTc interval at risk of sudden death.[3]

File:Sqts.svg
Precordial ECG tracings of a patient with SQTS

References

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  1. Error fetching PMID 12925462: [Gaita]
  2. Fridericia LS. Die Systolendauer im Elektrokardiogramm bei normalen

    Menschen und bei Herzkranken. Acta Med Scand. 1920;53:469–486.

    [Fridericia]
  3. Error fetching PMID 17679619: [Anttonen]
  4. Bazett HC. An analysis of the time-relations of electrocardiograms. Heart 1920;7:353-370.

    [bazett]
  5. Error fetching PMID 14954534: [Lepeschkin]

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