Key result
Noncompaction cardiomyopathy is linked to ~159% higher left atrial ejection force, reflecting compensatory workload.
Why the study?
Atrial function has not been examined in noncompaction cardiomyopathy despite known left ventricular dysfunction and elevated left atrial pressures.
Does real-time three-dimensional echocardiography show altered left atrial systolic function in patients with noncompaction cardiomyopathy compared to healthy controls?
Case-Control (n=34)
No
Does real-time three-dimensional echocardiography show altered left atrial systolic function in patients with noncompaction cardiomyopathy compared to healthy controls?
Absolute Event Rate: 12.7% vs 4.9%
p-value: p=<0.01
Left atrial ejection force is significantly increased in patients with noncompaction cardiomyopathy, suggesting compensatory left atrial work against a dysfunctional left ventricle.
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Hypothesis-generating for compensatory left atrial mechanisms in noncompaction cardiomyopathy; prospective validation needed before clinical adoption.
Nemes et al. (2007) conducted a case-control in Noncompaction cardiomyopathy (n=34). Noncompaction cardiomyopathy vs. Healthy age-matched controls was evaluated on Left atrial ejection force based on mitral annulus area (LAEF3D-MAA) (p=<0.01). Noncompaction cardiomyopathy was associated with significantly increased left atrial ejection force compared to healthy controls (12.7 vs 4.9 kdyne, p<0.01), indicating higher compensatory left atrial workload.
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