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. 2024 Mar 4;14(3):2514–2527. doi: 10.21037/qims-23-1143

Figure 2.

Figure 2

Layer-specific strain and MW technology in the HFpEF group. (A) Bull’s eye diagram of layer-specific strain technology; (B) LVPSL and MW parameters. Illustration of the GCW and GWW at the lower right of the image. 1 mmHg =0.133 kPa. Epi, subepicardium; Endo, subendocardium; ANT_SEPT, anteroseptal; ANT, anterior; LAT, lateral; POST, posterior; INF, inferior; SEPT, septal; LVPSL, left ventricular pressure strain loop; AVC, aortic valve closure; AVO, aortic valve opening; MVC, mitral valve closure; MVO, mitral valve opening; MW, myocardial work; HFpEF, heart failure with preserved ejection fraction; GLS, global longitudinal strain; GWI, global myocardial work index; GCW, global myocardial constructive work; GWW, global myocardial wasted work; GWE, global myocardial work efficiency; BP, blood pressure.