Taxonomy of segmental myocardial systolic dysfunction

Area of Science:

• Cardiology
• Medical Imaging
• Pathophysiology

Background:

• Inconsistent terminology for myocardial health and disease complicates clinical practice.
• Terms like 'viable' and 'hibernating' are often misused for chronic contractile dysfunction in ischemic heart disease.
• Variability in imaging modalities further challenges consistent definitions of myocardial states.

Purpose of the Study:

• To address the lack of precise definitions in myocardial health and disease nomenclature.
• To describe diverse myocardial pathologies in ischemic heart disease and cardiomyopathy.
• To establish a taxonomy of myocardial dysfunction based on non-invasive imaging assessment.

Main Methods:

• Review of current literature on myocardial pathologies and nomenclature.
• Analysis of non-invasive imaging techniques used to assess myocardial function.
• Synthesis of information to propose a classification system for myocardial dysfunction.

Main Results:

• Identified imprecision and interchangeability of terms like 'viable' and 'hibernating' myocardium.
• Highlighted challenges posed by different imaging modalities in defining myocardial states.
• Recognized the need for standardized definitions to improve clinical interpretation of trial outcomes.

Conclusions:

• A clear taxonomy of myocardial dysfunction is needed for accurate clinical application.
• Standardized definitions and assessment using non-invasive imaging are crucial for understanding ischemic heart disease and cardiomyopathy.
• Improved nomenclature will enhance the interpretation and utility of clinical trial results.