Key result
Diastolic stiffness index No. 4 uniquely accounts for increased LV stiffness with weak hemodynamic dependence.
Why the study?
The LV end-diastolic pressure-volume ratio varies widely and depends heavily on inflow and resistance boundary conditions, complicating the assessment of left ventricular diastolic distensibility.
Diastolic stiffness index No. 4 is a robust measure for assessing LV diastolic distensibility across various cardiac pathologies, independent of LVEF and heart rate.
Index No. 4 may aid LV diastolic assessment; leaves open prospective validation before clinical adoption.
The major property of the myocardium that determines left ventricular (LV) filling is its distensibility. The simplest measure for its assessment is the LV end-diastolic pressure–volume ratio, although it can vary within a wide range and is highly dependent on inflow and resistance boundary conditions, making distensibility difficult to assess. Here, we consider six calculated indices of LV diastolic stiffness, most of which are based on Hooke’s law, comparing their stability, variation, and correlation coefficients with different hemodynamic parameters. The diastolic stiffness index No. 4 proved to be the only measure that takes into account an increase in LV stiffness over diastole. It shows a weak dependence on LV ejection fraction, heart rate, and other parameters of LV hemodynamics, and hence can be used to assess LV diastolic distensibility in various cardiac pathologies.
No takes yet. Share an insight, caveat, or question.
Kapelko et al. (2024) studied Left ventricular diastolic distensibility. Diastolic stiffness index No. 4 vs. Other calculated indices of LV diastolic stiffness was evaluated on Stability, variation, and correlation coefficients with different hemodynamic parameters. Diastolic stiffness index No. 4 was the only measure accounting for increased LV stiffness over diastole, showing weak dependence on LV hemodynamics for assessing distensibility.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: