Right ventricular hypertrabeculation was associated with significantly higher RV volumes and lower RV-EF in patients with decreased LV function, suggesting RV involvement in noncompaction.
Observational (n=119)
The presence of RV hypertrabeculation and its correlation with LV trabeculation and RV parameters suggest RV involvement in left ventricular noncompaction, with RV strain potentially aiding in the early detection of RV deterioration.
BACKGROUND: Reports of left ventricular noncompaction (LVNC) rarely include descriptions of the right ventricle (RV). This study aimed to describe the characteristics of the RV in LVNC patients with reduced LV function (LVNC-R) compared with patients with dilated cardiomyopathy (DCM) and subjects with LVNC with normal left ventricular ejection fraction (LV-EF) (LVNC-N). METHODS: Forty-four LVNC-R patients, 44 LVNC-N participants, and 31 DCM patients were included in this retrospective study (LV-EF: LVNC-R: 33.4±10.2%; LVNC-N: 65.0±5.9%; DCM: 34.6±7.9%). Each group was divided into two subgroups by the amount of RV trabeculation. RESULTS: There was no difference in the RV-EF between the groups, and the RV trabecular mass correlated positively with the RV volume and negatively with the RV-EF in all the groups. All the measured parameters were comparable between the groups with decreased LV function. The hypertrabeculated RV subgroups showed significantly higher RV volumes and lower RV-EF only in the decreased-LV-function groups. The correlation of LV and RV trabeculation was observed only in the LVNC-N group, while LV trabeculation correlated with RV volumes in both noncompacted groups. Both decreased-LV-function groups had worse RV strain values than the LVNC-N group; however, RV strain values correlated with RV trabeculation predominantly in the LVNC-R group. CONCLUSIONS: The presence and characteristics of RV hypertrabeculation and the correlations between LV trabeculation and RV parameters raise the possibility of RV involvement in noncompaction; moreover, RV strain values might be helpful in the early detection of RV function deterioration.
Gregor et al. (Mon,) conducted a observational in Left ventricular noncompaction with reduced ejection fraction (n=119). Right ventricular hypertrabeculation vs. Normal right ventricular trabeculation was evaluated on Right ventricular ejection fraction, volume, and strain. Right ventricular hypertrabeculation was associated with significantly higher RV volumes and lower RV-EF in patients with decreased LV function, suggesting RV involvement in noncompaction.