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[Myocardial damage following cardioversion]

J Verdejo París, M C Müggenburg, M Cárdenas Loaeza

    Archivos Del Instituto De Cardiologia De Mexico
    |July 1, 1981
    PubMed
    Summary
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    Direct current (DC) cardioversion is safe, with no significant myocardial damage observed. Studies using ECG, enzyme levels, and scintigraphy showed no correlation, indicating the procedure

    Area of Science:

    • Cardiology
    • Electrophysiology

    Background:

    • Elective direct current (DC) cardioversion is a common procedure for treating cardiac rhythm abnormalities.
    • Concerns exist regarding potential myocardial damage following DC cardioversion.
    • Assessing myocardial injury is crucial for patient safety and procedural optimization.

    Purpose of the Study:

    • To evaluate myocardial damage after DC cardioversion.
    • To correlate electrocardiogram (ECG) changes, cardiac enzyme levels (SGOT, LDH, CKMB), and myocardial scintigraphy findings.
    • To determine the safety and innocuous nature of DC cardioversion within clinical limits.

    Main Methods:

    • Studied 20 patients undergoing elective DC cardioversion at the National Institute of Cardiology Ignacio Chávez.
    • Utilized ECG, serum enzyme levels (SGOT, LDH, CKMB), and myocardial scintigraphy before and after the procedure.

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  • Analyzed data to detect and correlate potential myocardial lesions.

    • Main Results:

    • Only two patients showed a significant rise in CKMB levels.
    • Significant ECG changes were observed in 40% of patients.
    • Myocardial scintigraphy was positive in a diffuse pattern in 50% of cases, with no clear correlation between the three diagnostic methods.

    Conclusions:

    • DC cardioversion, when used within normal clinical limits, is a safe procedure.
    • No significant myocardial damage can be attributed to DC cardioversion.
    • The lack of correlation between ECG, enzyme levels, and scintigraphy suggests these markers may not reliably indicate cardioversion-induced myocardial injury.