Regional Strain Determination and Myocardial Infarction Detection by Three‐Dimensional Echocardiography with Varied Temporal Resolution

This study aims to evaluate the feasibility and accuracy of 3DE on longitudinal and circumferential strain (LS, CS) determination and infarction detection under variable frame rates (FR) and “heart rates” (stroke rates [SR]) conditions. MethodsLatex balloons were sewn into the left ventricle (LV) of 20 freshly harvested pig hearts which were then passively driven by a pulsatile pump apparatus at stroke volumes (SV) 30–70 mL. The hearts were pumped at 2 normal limits of human heart rate. Full‐volume data were acquired before and after a simulated myocardial infarction (MI) at the 2 most commonly used FRs. LS and CS values were evaluated against sonomicrometry. ResultsLongitudinal strain and CS derived from high FR acquisitions showed statistically superior correlations with sonomicrometry data (LS: R2 = 0.85, CS: R2 = 0.84) than strain values from low FR (LS: R2 = 0.78, CS: R2 = 0.76) (all P 
Source: Echocardiography - Category: Cardiology Authors: Tags: Original Investigation Source Type: research

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