To the Editor: Moderator band (MB) is a part of the septomarginal trabeculation, which not only supports the anterior papillary muscle (APM) of the tricuspid valve but also connects it to the free wall.
PVCs arising from the moderator band: An under-recognized trigger for idiopathic VF?
Ventricular tachycardia originating from moderator band: New perspective on catheter ablation.
 reported the first case of VF originating from the moderator band (MB), a structure that never was thought to have a correlation with arrhythmia before.
Sureddi et al., "Idiopathic ventricular arrhythmias originating from the moderator band: electrocardiographic characteristics and treatment by catheter ablation," Heart Rhythm, vol.
In 1837, it was given name "moderator band" as a result of his conjecture that it might control the capacity of the right ventricle as a sort of governor.
Absence of the moderator band or of the septal papillary muscle should be viewed as congenital cardiac defects even though no haemodynamic abnormality is produced.
Moderator Band. At 19 cm CVRL, it was composed of Purkinje fibers, thin layer of myocardium, and endocardium.
Similarly  in ox and goat reported that moderator band contained bundles of Purkinje fibers and nerve fibers separated by connective tissue.
Since in human [23, 24] the moderator band extends between interventricular septum and ventricular free wall and in domestic animals  and ungulates  these bands extend from interventricular septum to the papillary muscle and there is no connection to the vulvarcusps.
Clelland, "Note on a moderator band in the left ventricle and perforate septum ovale in the heart of a sheep," Journal of Anatomy and Physiology, vol.
The right side of the heart (right ventricle) can have a large moderator band
, which is a benign structure frequently seen toward the tip of the ventricle especially when it is enlarged.