Left atrial anomalous fibromuscular bands: a systematic review of case reports

Łukasz Piątek; Karolina Piątek; Jacek Kurzawski; Marianna Janion

doi:10.5114/ms.2026.160485

eISSN: 2300-6722
ISSN: 1899-1874

Medical Studies/Studia Medyczne

Current issue Archive Manuscripts accepted About the journal Editorial board Abstracting and indexing Subscription Contact Ethical standards and procedures Supplements Instructions for authors Publication charge

Editorial System

Submit your Manuscript

Editorial Policies

Sarajevo Declaration on Integrity and Visibility of Scholarly Publications

Open access

1/2026
vol. 42

Send email

Copy url:

abstract:

Review paper

Left atrial anomalous fibromuscular bands: a systematic review of case reports

Łukasz Piątek

¹

,

Karolina Piątek

¹

,

Jacek Kurzawski

¹

,

Marianna Janion

¹

Institute of Medical Sciences, Jan Kochanowski University, Kielce, Poland

Medical Studies 2026; 42 (1): 7–11

DOI: https://doi.org/10.5114/ms.2026.160485

Online publish date: 2026/04/20

View full text Get citation

PlumX metrics:

Introduction
Left atrial fibromuscular band (LAMB) is an infrequently described anomaly of the heart.

Methods
Our knowledge about it is still limited and comes solely from case reports.

Results
Prevalence of LAMB is nowadays estimated as 0.1% in the general population.

Conclusions
The majority of all cases appears to be completely asymptomatic and the diagnosis is made accidentally during imaging of the heart (echocardiography or computed tomography). Conversely, there is a group of patients in whom the bands are attached to mitral valve leaflet triggering mitral valve prolapse and severe regurgitation that often demand surgical repair. Finally, the LAMB appears to be a possible cause of a cryptogenic stroke. However, this issue remains unclear because there is not enough evidence until now.

keywords:

Left atrial anomalous fibromuscular bands: a systematic review of case reports

Łukasz Piątek 1 , Karolina Piątek 1 , Jacek Kurzawski 1 , Marianna Janion 1

left atrial, anomalous fibromuscular band, string-like structure, mitral valve prolapse

Łukasz Piątek

¹

,

Karolina Piątek

¹

,

Jacek Kurzawski

¹

,

Marianna Janion

¹