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Asynchronous left ventricular wall motion early after coronary thrombosis.

D Gibson, H Mehmel, F Schwarz

    British Heart Journal
    |January 1, 1986
    PubMed
    Summary
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    Early acute myocardial infarction shows asynchronous wall motion, not just hypokinesis or dyskinesis. This suggests residual heart muscle activity persists for hours after coronary thrombosis symptoms begin.

    Area of Science:

    • Cardiology
    • Cardiovascular Imaging
    • Myocardial Infarction Research

    Background:

    • Acute myocardial infarction (AMI) diagnosis relies on detecting regional wall motion abnormalities.
    • Early detection of these changes is crucial for timely intervention and improved patient outcomes.

    Purpose of the Study:

    • To investigate early regional wall motion changes in acute myocardial infarction (AMI) using left ventriculography.
    • To differentiate between various patterns of wall motion abnormalities and their relation to coronary artery thrombosis.

    Main Methods:

    • Left ventriculograms from 24 patients within 3.5 hours of chest pain onset were analyzed frame-by-frame.
    • Digital image processing generated isometric and contour plots to assess regional wall motion.
    • Coronary angiography identified underlying stenosis and thrombosis in 19 patients.

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    Main Results:

    • Global left ventricular function indices were mostly normal, but end-systolic volume was elevated.
    • Asynchronous wall motion was more common than simple hypokinesis or dyskinesis in acute coronary thrombosis.
    • Specific patterns of wall motion abnormalities correlated with the location of coronary artery thrombosis (anterior descending, right, or circumflex).

    Conclusions:

    • Early acute myocardial infarction is characterized by asynchronous regional wall motion, often preceding or accompanying hypokinesis/dyskinesis.
    • The observed patterns suggest residual myocardial contractile activity can persist for up to six hours post-symptom onset in coronary thrombosis.
    • Coronary artery disease complexity influences wall motion patterns, highlighting the need for detailed regional analysis.