Clinical InvestigationVentricular MechanicsDiagnostic Value of Rigid Body Rotation in Noncompaction Cardiomyopathy
Section snippets
Study Participants
The study population consisted of 30 patients diagnosed before 2008 with NCCM by expert opinion (of whom 10 were included in a previous study on LV twist in NCCM)9 and 22 consecutive patients with prominent trabeculations (visual estimated end-systolic ratio of noncompacted to compacted layer >1.5) who underwent echocardiography in 2008, identified by one physician highly experienced with echocardiography (M.L.G.). All patients were in sinus rhythm and had good echocardiographic image quality
Characteristics of the Study Population
Revision of the 30 patients with previously established diagnoses of NCCM led to confirmation of the diagnosis in 29 by the criteria of Jenni et al.10 and in all 30 by expert opinion. Of the 22 patients with various degrees of hypertrabeculation, seven were classified as having NCCM by the criteria of Jenni et al. and four by expert opinion. The remaining patients were classified as “subjects with hypertrabeculation.” So, in total, 36 patients were diagnosed as having NCCM by the criteria of
Discussion
Echocardiography is currently the reference standard for the diagnosis of NCCM,16 although this recently has been called into question.17 The most important conclusion of the present study is that RBR is an objective, quantitative, and reproducible functional criterion with good predictive value for the diagnosis of NCCM as established by expert opinion.
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