Key result
Cardiovascular magnetic resonance feature tracking detected early LV dysfunction in ARVC patients with preserved LVEF, which correlated with right ventricular global radial peak strain (r=-0.47, P<0.001).
Why the study?
LV involvement is common in ARVC, and the authors aimed to evaluate LV involvement in ARVC patients using cardiovascular magnetic resonance feature tracking.
Does cardiovascular magnetic resonance feature tracking detect early left ventricular involvement in patients with arrhythmogenic right ventricular cardiomyopathy?
Cross-Sectional (n=98)
Does cardiovascular magnetic resonance feature tracking detect early left ventricular involvement in patients with arrhythmogenic right ventricular cardiomyopathy?
p-value: p=<0.05
Cardiovascular magnetic resonance feature tracking can detect early subclinical left ventricular dysfunction in ARVC patients with preserved ejection fraction, which correlates with late gadolinium enhancement and right ventricular dysfunction.
CMR-FT may identify subclinical LV involvement in preserved-LVEF ARVC; hypothesis-generating for prospective prognostic validation.
Background Left ventricular (LV) involvement is common in arrhythmogenic right ventricular cardiomyopathy (ARVC). We aim to evaluate LV involvement in ARVC patients by cardiovascular magnetic resonance feature tracking. Methods and Results Sixty-eight patients with ARVC and 30 controls were prospectively enrolled. ARVC patients were divided into 2 subgroups: the preserved LV ejection fraction (LVEF) group (LVEF ≥55%, n=27) and the reduced LVEF group (LVEF <55%, n=41). Cardiovascular magnetic resonance with late gadolinium enhancement (LGE) and cardiovascular magnetic resonance feature tracking were performed in all subjects. LV global and regional (basal, mid, apical) peak strain (PS) in radial, circumferential and longitudinal directions were assessed, respectively. Right ventricular global PS in three directions were also analyzed. Compared with the controls, LV global and regional PS were all significantly impaired in the reduced LVEF group (all P<0.05). However, only LV global longitudinal PS as well as mid and apical longitudinal PS were impaired in the preserved LVEF group (all P<0.05), and all these parameters were significantly associated with right ventricular global radial PS (r=-0.47, -0.47, and -0.49, respectively, all P<0.001). The reduced LVEF group showed significantly higher prevalence of LGE (95.10% versus 63.00%, P=0.002) than the preserved LVEF group. Moreover, LV radial PS was significantly reduced in LV segments with LGE (33.15±20.42%, n=46) than those without LGE (41.25±15.98%, n=386) in the preserved LVEF group (P=0.016). Conclusions In patients with ARVC, cardiovascular magnetic resonance feature tracking could detect early LV dysfunction, which was associated with LV myocardial LGE and right ventricular dysfunction.
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Chen et al. (2019) conducted a cross-sectional in Arrhythmogenic right ventricular cardiomyopathy (ARVC) (n=98). Cardiovascular magnetic resonance feature tracking vs. Controls was evaluated on Left ventricular global and regional peak strain (p=<0.05). Cardiovascular magnetic resonance feature tracking detected early LV dysfunction in ARVC patients with preserved LVEF, which correlated with right ventricular global radial peak strain (r=-0.47, P<0.001).
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