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Myocardial cell membrane stabilization and antiarrhythmic action.

L Szekeres

    Drugs Under Experimental and Clinical Research
    |January 1, 1986
    PubMed
    Summary

    Cardiac cell membrane changes can cause arrhythmias. Membrane stabilization, including with calcium antagonists or dietary changes, helps restore normal function and prevent heart rhythm disorders.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Pharmacology

    Background:

    • Pathological changes like ischemia, hypoxia, and hypercapnia disrupt cardiac cell membrane ion permeability.
    • These disruptions lead to electrophysiological abnormalities, including altered impulse conduction, excitability, and automaticity.
    • The interplay of these changes is a primary cause of cardiac arrhythmias.

    Purpose of the Study:

    • To explore the concept of membrane stabilization in a broader sense as an antiarrhythmic strategy.
    • To investigate various agents and interventions that can restore normal cardiac membrane function.
    • To demonstrate these effects in relevant animal models.

    Main Methods:

    • Studied electrophysiological changes in cardiac cells due to altered ion permeability.
    • Investigated the antiarrhythmic effects of classical membrane stabilizers (quinidine, lidocaine).
    • Examined the impact of calcium antagonists and phospholipid composition modifiers (linoleic-rich diet) on cardiac membranes.
    • Utilized in situ canine heart and conscious rat infarction models.

    Main Results:

    • Demonstrated that shifts in neurovegetative, hormonal, and ionic balances induce cardiac arrhythmias.
    • Showcased that membrane stabilization, broadly defined, counteracts these arrhythmogenic changes.
    • Provided evidence that calcium antagonists and dietary interventions exhibit antiarrhythmic properties by modulating membrane function.

    Conclusions:

    • Cardiac arrhythmias arise from complex electrophysiological disturbances caused by altered membrane permeability.
    • Membrane stabilization is a key principle for preventing arrhythmias, encompassing a wide range of therapeutic approaches.
    • Diverse interventions, including pharmacological agents and dietary modifications, can achieve membrane stabilization and protect against arrhythmias.

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