Objective:

To investigate the prognostic significance and feasibility of assessing left ventricular (LV) longitudinal function among critically ill patients.

Approach:

• Method: T
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Key Findings:

• LVEF measured by Simpson’s biplane does not correlate with mortality.
• LV longitudinal strain may offer superior prognostic information compared to LVEF.
• A hyperdynamic LV state (LVEF ≥ 70%) is associated with increased in-hospital mortality.
• A U-shaped relationship exists between LVEF and mortality in critical illness.
• Longitudinal markers like MAPSE and TDI-S’ could aid in diagnosing LV hyperdynamic profiles.

Interpretation:

The hyperdynamic LV state indicates a maladaptive reaction to severe vasodilatory shock rather than enhanced cardiac performance.

Limitations:

• The complexity of measuring LVEF using Simpson’s method in the ICU.
• Lack of defined thresholds for MAPSE and TDI-S’ in characterizing LV hyperdynamic profiles.

Conclusion:

Further investigation into the relationship between longitudinal markers and LV hyperdynamic states could enhance understanding of LV function in critically ill patients.

Sources:

• Cavefors et al.