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Left ventricular noncompaction: a cardiomyopathy with distinct characteristics and risks
Jonathan Summers1, Brandon Mikolich
1Jonathan Summers, ACNP-BC, MSN, BS, BSN, RN Acute Care Nurse Practitioner (ACNP-BC), Pulmonary and Critical Care, Sharon Regional Health System, Pennsylvania. Brandon Mikolich, MD, FACC Interventional Cardiologist, Sharon Cardiology Specialists, Sharon Regional Health System, Pennsylvania.
Insights
Left ventricular noncompaction (LVNC) is a congenital heart condition often unrecognized for decades. Early and accurate diagnosis is crucial for managing severe complications like heart failure and arrhythmias.
Area of Science:
- Cardiology
- Genetics
- Medical Diagnostics
Background:
- Left ventricular noncompaction (LVNC) is a rare cardiomyopathy characterized by prominent ventricular trabeculations and deep recesses.
- This condition is often undiagnosed for years and presents significant life-threatening risks.
- Accurate diagnosis is essential for effective management and risk mitigation.
Purpose of the Study:
- To familiarize clinicians with the diagnostic criteria for LVNC.
- To highlight the clinical significance and diagnostic challenges of LVNC.
- To emphasize the importance of accurate diagnosis for patient treatment.
Main Methods:
- Review of diagnostic criteria for LVNC.
- Discussion of diagnostic modalities including echocardiography and cardiac MRI.
- Clinical case analysis (implied).
Main Results:
- LVNC is a congenital condition that can manifest clinically at any age.
- It can occur independently or as part of broader genetic or congenital syndromes.
- Major complications include heart failure, arrhythmias, and thromboembolism.
Conclusions:
- Transthoracic echocardiography is the primary screening tool for LVNC.
- Cardiac MRI is recommended for definitive diagnosis when echocardiography is inconclusive or findings are suspicious.
- Prompt diagnosis and appropriate management are critical for patients with LVNC.
Background:
Left ventricular noncompaction (LVNC) cardiomyopathy is a heterogeneous condition that is gaining recognition as a distinct clinical entity. It is characterized by numerous, excessively prominent ventricular trabeculations with deep trabecular recesses and the formation of 2 distinct layers of myocardium. It is often unrecognized clinically for decades and poses distinct life-threatening complications. Accurate diagnosis is key to minimizing risks associated with LVNC.
Purpose:
This article will introduce clinicians to the defining criteria and diagnostic process for recognition of LVNC. Left ventricular noncompaction is an important clinical entity not easily recognized at first glance but has important clinical ramifications for treatment requiring an accurate diagnosis.
Conclusions:
Left ventricular noncompaction is present at birth but can remain clinically silent for decades. It is found both in isolation and as a part of other congenital cardiac, extracardiac, neuromuscular, and genetic syndromes. Left ventricular noncompaction is associated with the major complications of heart failure, tachyarrhythmias, and systemic thromboembolism.
Clinical Implications:
Transthoracic echocardiography will likely remain the initial screening modality, but modality limitations, questionable findings, and clinical presentations suspicious for noncompaction should be followed up promptly with cardiac magnetic resonance imaging for definitive diagnosis and treatment.
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