The omohyoid muscle entrapment of the internal jugular vein. A still unclear pathogenetic mechanism http://phl.sagepub.com/content/early/2013/05/16/0268355513489549.abstract

"...Conclusions: The omohyoid muscle compression on the internal jugular vein seems to be a possible cause of venous obstruction, but several anatomical and patho-physiological aspects need further investigations. Such picture might cause balloon venous angioplasty inefficacy and needs to be preoperatively considered...."


The omohyoid muscle entrapment of the internal jugular vein. A still unclear pathogenetic mechanism
phl.sagepub.com
Objectives: To evaluate the role of the omohyoid muscle anatomic variants as a possible reversible cause of internal jugular vein extrinsic compression.