- Poster presentation
- Open Access
CMR of LV non-compaction cardiomyopathy: association of clinical presentation and prognosis with cardiac phenotype
© Syed et al; licensee BioMed Central Ltd. 2011
- Published: 2 February 2011
- Ventricular Tachycardia
- Late Gadolinium Enhancement
- Cardiac Phenotype
- Monomorphic Ventricular Tachycardia
- Refractory Heart Failure
Left ventricular non-compaction (LVNC) is a rare congenital disorder characterized by two layered myocardium; trabeculated (non-compacted) and a non-trabeculated (compacted). LVNC is increasingly being recognized due to better imaging technology as a cause for heart failure and sudden cardiac death; however, data on clinical and imaging characteristics remains limited.
To investigate the association of clinical presentation and outcomes in LVNC with cardiac phenotype by CMR.
Fourteen patients (mean age 33.1 ± 17.6 years, 9 male) were retrospectively identified from CMR database between December 2007 and May 2010. CMR imaging included SSFP cine in standard views and late gadolinium enhancement. Quantitative analysis included left and right ventricular function, volumes, mass, LV wall motion score and non-compacted to compacted myocardium (NC/C) ratios in different segments. Number of involved LV segments and regions of maximum NC/C ratio were also recorded.
Patient's medical records were reviewed for clinical history including NYHA functional class, ECG, telemetry, Holter/event monitoring and electrophysiology studies.
Non-parametric U test, logistic regression analysis and parametric T-test were used to determine statistical significance as appropriate.
Seven patients presented with acute heart failure including one in cardiogenic shock. Three patients presented with syncope, one with documented ventricular tachycardia (VT).
LVEF >50% (N=6)
LVEF ≤50% (N=8)
1 (IQR 1-1)
3 (IQR 2-4)
LV end-diastolic volume index (ml/m2)
LV end-systolic volume index (ml/m2)
LV mass index (g/m2)
Wall motion score index
NC/C ratio (maximum)
RV EF (%)
Four patients had non-sustained monomorphic VT. Two patients had premature ventricular complexes on telemetry. One patient had paroxysmal atrial fibrillation, and one had atrioventricular nodal reentry tachycardia (AVNRT).
There were no deaths over a mean follow-up of 7.0 ± 4.6 months. One patient received a heart transplant for severe refractory heart failure. Five patients received an ICD; 4 with non-sustained VT and 1 with severe LV dysfunction. Patient with AVNRT underwent successful ablation.
Patients with LVNC have a spectrum of cardiac phenotypes ranging from normal LV and RV to severe biventricular dysfunction. Clinical presentation and symptoms are associated with degree of non-compaction and ventricular dysfunction.
This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (<url>http://creativecommons.org/licenses/by/2.0</url>), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.