Left ventricular noncompaction: a diagnostically challenging cardiomyopathy

Area of Science:

• Cardiology
• Genetics
• Pathophysiology

Background:

• Left ventricular noncompaction (LVNC) cardiomyopathy diagnosis is challenging due to shared features with hypertrophic and dilated cardiomyopathies.
• Lack of a definitive diagnostic tool, like a genetic marker, contributes to diagnostic uncertainty.
• Distinguishing LVNC from normal variations is often indistinct, complicating diagnosis.

Purpose of the Study:

• To highlight the diagnostic challenges in left ventricular noncompaction (LVNC) cardiomyopathy.
• To emphasize the need for improved diagnostic criteria and approaches for LVNC.
• To advocate for an integrated diagnostic strategy for LVNC.

Main Methods:

• Review of current diagnostic criteria and challenges for LVNC.
• Discussion of echocardiography's role and limitations in LVNC diagnosis.
• Exploration of the potential of a morphologic/pathophysiologic approach.

Main Results:

• Current diagnostic criteria for LVNC, particularly echocardiographic measurements, may lack specificity and lead to overdiagnosis.
• LVNC diagnosis requires significant expertise across various overlapping cardiomyopathies.
• The distinction between LVNC morphology and normal phenotypes is often unclear.

Conclusions:

• Accurate and reproducible diagnosis of LVNC is critical due to its severe clinical sequelae, including arrhythmias, heart failure, and sudden death.
• A shift towards a combined morphologic and pathophysiologic diagnostic approach shows promise for improving LVNC diagnosis.
• Future understanding and diagnosis of LVNC necessitate integrating cardiac morphology, physiology, pathophysiology, and genetics.