Abstract
To evaluate biventricular mechanics by means of echo-derived myocardial work (MW) analysis in patients with a systemic right ventricle (sRV). Comprehensive echo data were collected in all patients with a sRV who underwent transthoracic echocardiography at our tertiary centre between 2020 and 2021 including sRV function indices, global longitudinal strain (GLS) of right and left ventricle (RV/LV), biventricular MW, and atrial strain in those with congenitally corrected transposition of the great arteries (ccTGA). Fifty-six patients (37 [30.97–45.87]years, 59% male) and 49 healthy individuals matched per age and sex were included for comparison. Global work index (GWI:1106 [869.80–1293.10] Vs 314.2 [281.5–358.2]mmHg%, p < 0.0001) and global constructive work(GCW: 1542.50 [1338.9–1718.50] Vs 416.4 [365.70–464]mmHg%, p < 0.0001) were both increased for sRV compared to normal RV, reflecting exposition to a systemic afterload, with a contemporary raise in wasted work (GWW:197 [138.50-322.20] Vs 26.09 [17.80–43.48]mmHg%, p < 0.0001) and impaired efficiency (GWE:89 [83–93.54] Vs 93.67 [91.67–96] %, p < 0.0001). Conversely, sRV showed reduced MW indices in comparison to normal LV(p < 0.0001 for all). Non-systemic LV demonstrated normal GLS values (19.51 ± 3.9%), but reduced GWI (479 [368–665] Vs 2172 [1978–2386]mmHg%, p < 0.0001) and GCW (708 [490–815]mmHg% Vs 86.5 [59.25–118], p < 0.0001). Nevertherless, non-systemic LV showed also impaired efficiency (91 [88–94] Vs 95 [94–97]%, p < 0.0001). LVGLS values were related to RVGLS (R = 0.5, p = 0.00019), suggesting a consistent interventricular dependency. Atrial strain could be assessed in 16 out of 20 (80%) patients with ccTGA: both atria had reduced strain values compared to their normal counterparts. Moreover, pulmonary atrial strain during the reservoir phase was related to LVGWE (R = 0.58, p = 0.047) and inversely related to LVGLS (R = − 0.71, p = 0.0043). MW analysis is feasible in sRV and may provide additional clinical data. In our cohort MW revealed biventricular impairment, in particular for non-systemic LV, in spite of normal GLS values.
Graphical abstract
Main research findings. Asterisks indicate p-value < 0.0001
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No datasets were generated or analysed during the current study.
Abbreviations
- EF:
-
Ejection fraction
- FAC:
-
Fractional area change
- GCW:
-
Global constructive work
- GLS:
-
Global longitudinal strain
- GWE:
-
Global work efficiency
- GWI:
-
Global work index
- GWW:
-
Global wasted work
- LV:
-
Left ventricle
- MW:
-
Myocardial work
- sRV:
-
Systemic right ventricle
- ccTGA:
-
Congenitally corrected transposition of the great arteries
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FF and GS conceptualized and wrote the manuscript, DS and GS collected the data, FF and MA analyzed the data, IA prepared the figures, BS finalized the draft. All authors have reviewed the manuscript.
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Fusco, F., Scognamiglio, G., Sorice, D. et al. Biventricular performance in adults with a systemic right ventricle: new insights from myocardial work analysis. Int J Cardiovasc Imaging (2024). https://doi.org/10.1007/s10554-024-03076-0
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DOI: https://doi.org/10.1007/s10554-024-03076-0