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Related Experiment Videos

Cardiac troponin I does not increase after cardioversion

E Bonnefoy1, P Chevalier, G Kirkorian

  • 1Service de Cardiologie, Hôpital Cardiologique et Pneumologie Louis Pradel, Lyon, France.

Chest
|January 1, 1997
PubMed
Summary

Electrical cardioversion does not elevate cardiac troponin I (cTnI) levels. Increases in creatine kinase (CK) and myoglobin are linked to muscular damage and energy delivered during the procedure.

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Area of Science:

  • Cardiology
  • Biomarkers
  • Electrophysiology

Background:

  • Electrical cardioversion can elevate serum total creatine kinase (CK) and CK-MB levels.
  • Cardiac troponin I (cTnI) is a specific biomarker for myocardial injury.

Purpose of the Study:

  • To assess cardiac damage after cardioversion by measuring serum cTnI, myoglobin, total CK, and CK-MB mass.
  • To determine if cardioversion induces a significant elevation in cTnI.

Main Methods:

  • Serum cTnI, myoglobin, total CK, and CK-MB mass were measured in 28 patients post-cardioversion.
  • Measurements were taken at multiple time points up to 24 hours after the procedure.
  • Cardioversion energy levels were recorded and correlated with biomarker changes.

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Main Results:

  • cTnI levels remained below the detection limit in most patients, with minor elevations in three.
  • No correlation was found between cTnI levels and cardioversion energy or number of shocks.
  • Myoglobin and total CK increased significantly in 11 patients, with values reaching myocardial infarction-like levels in five.
  • A strong correlation was observed between delivered energy and increases in myoglobin and total CK.

Conclusions:

  • Clinical cardioversion does not induce elevation of cardiac troponin I (cTnI).
  • Elevated total CK, CK-MB, and myoglobin are likely due to muscular lesions, not cardiac damage.
  • The degree of muscular damage is closely related to the cumulative energy delivered during cardioversion.