Early cardiac mechanics abnormalities in patients with mitochondrial diseases

Rosa Lillo, Maria Chiara Meucci, Silvia Malara, Guido Alessandro Primiano, Serenella Servidei, Antonella Lombardo, Maria Grandinetti, Massimo Massetti, Gaetano Antonio Lanza, Giuseppe Limongelli, Francesca Graziani

Risultato della ricerca: Contributo in rivistaArticolo in rivista

Abstract

Background: Evidence about early cardiac mechanics abnormalities in patients with mitochondrial diseases (MDs) before overt cardiomyopathy is limited. Methods: In this prospective study, we performed a comparative analysis of conventional and speckle tracking echocardiographic parameters between patients with genetically identified MDs and no overt cardiomyopathy vs controls matched for age, sex and cardiovascular risk factors. The Newcastle mitochondrial disease adult scale (NMDAS) was calculated, using a threshold of > 21 as indicator of high disease severity. Results: We enrolled 24 MDs patients (50 % males, mean age 47.2 ± 14.3 years), the most prevalent mutation was the MT-TL1 m.3243A>G (37.5 %). In MDs patients all dimensional echocardiographic parameters were similar to controls. Conversely, albeit normal, Tissue Doppler septal systolic (p = 0.002) and early diastolic velocities (p = 0.016) were significantly lower and E/e’ ratio was higher (p = 0.032) in MDs. Moreover, LV-GLS was significantly reduced in MDs as compared to their counterparties (20.2 ± 1.6 vs 22.6 ± 1.5, p < 0.001). Similarly, LA reservoir and conduit strain were significantly lower in MDs (31.7 ± 7.0 vs 35.9 ± 6.6, p = 0.038; 19.7 ± 5.6 vs 23.1 ± 6.0, p = 0.049 respectively), while LA contractile strain was similar between the two groups. Lower values of LV-GLS were observed in patients with NMDAS > 21 vs patients with NMDAS ≤ 21 (19.0 ± 1.2 vs 21.0 ± 1.3, p = 0.001). Conclusions: In patients with MDs and no overt cardiomyopathy Tissue Doppler and speckle tracking analysis unveil worse LV systolic and diastolic function indices as compared to controls. Reduced LV-GLS values were found especially in those with worse disease burden.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
RivistaMitochondrion
Volume78
DOI
Stato di pubblicazionePubblicato - 2024

Keywords

  • Cardiac mechanics
  • Cardiomyopathy
  • Strain
  • Speckle-tracking echocardiography
  • Mitochondrial diseases

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