Isolated Noncompaction of the Ventricular Myocardium

This study intends to retrospectively-prospectively enroll NVM patients from multiple centers to establish a natural population cohort of NVM patients. By collecting clinical data and biological samples from surgical patients, the investigators will construct a prognosis prediction system for NVM, optimize risk stratification, explore new strategies for the early prevention and treatment of NVM, and improve the efficiency of clinical treatment of NVM patients.

The main objective of this study is to clarify prospectively prognosis of patients newly diagnosed as carriers of a LVNC (incident cases) (i.e. without the occurrence of a survival of the following events: death, heart transplantation or hospitalization for cardiovascular complications). In a second time, prognosis factors will be identify in these patients with LVNC.

The diagnostic criteria for isolated left ventricular non-compaction cardiomyopathy (IVNC) have been well established for echocardiography and cardiac magnetic resonance, such validation is lacking for computed tomography (CT). Such criteria are of great clinical relevance as a growing number of patients undergo a cardiac CT scan in daily clinical routine.
The investigators aim to test the diagnostic accuracy of cardiac CT in distinguishing IVNC from lesser degrees of trabecular layering seen in potential differential diagnoses such as cardiomyopathies and left ventricular hypertrophy or dilation.
The investigators hypothesize that echocardiographic diagnosed pathological trabeculation can be distinguished by determining the ratio of non-compacted to compacted myocardium on cardiac CT.