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Concealed quadrigeminy.

M M Aygen, H Dean, H Almog

    Cardiology
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Concealed quadrigeminy, a rare heart rhythm, was identified in diverse patients, including a pregnant woman and a myocardial infarction survivor. Mathematical formulas precisely describe the pattern of sinus beats between ectopic beats in this arrhythmia.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Cardiac Arrhythmias

    Background:

    • Concealed quadrigeminy is an uncommon cardiac arrhythmia characterized by a specific pattern of ectopic beats.
    • Understanding its occurrence in various patient populations is crucial for accurate diagnosis and management.

    Observation:

    • The study documented concealed quadrigeminy in three distinct cases: a pregnant woman, a patient with mitral valve prolapse, and an elderly male post-anterior myocardial infarction.
    • Continuous electrocardiographic monitoring was employed for durations ranging from 0.5 to 10 hours.

    Findings:

    • Analysis of interectopic intervals revealed a consistent mathematical relationship (s=4n-1) between sinus beats and ectopic beats in the observed cases.
    • A variant of concealed quadrigeminy was noted, where interpolated ectopic beats followed a different mathematical pattern (s=4n).

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    Implications:

    • These findings enhance the understanding of concealed quadrigeminy's presentation and electrophysiological characteristics.
    • The identification of mathematical patterns aids in the recognition and differentiation of this arrhythmia during electrocardiographic interpretation.