Why the study?
Although the inferior vena cava is a known rare source of non-PV foci in AF, the anatomical border between the IVC and the atrium was unclear in previous mapping cases.
This case demonstrates that the inferior vena cava can be a source of non-pulmonary vein foci in atrial fibrillation, which can be precisely localized using 3-D mapping.
Answers are grounded in this paper and cite their sources.
May support targeted IVC isolation after mapping concealed intramural ectopy; leaves open routine search given very low prevalence.
Key Teaching Points1.Although inferior vena cava (IVC) is known as a possible source of non-PV foci in AF patients, the prevalence is very low.2.Although some previous cases anatomically demonstrated the origin of the trigger from the IVC using a three-dimensional (3-D) mapping system, the definition of the border between the IVC and atrium was unclear.3.This case demonstrated continuous ectopic bigeminy definitely originating from the tiny area within the IVC by mapping ectopic beats both with and without conduction to the atrium from the IVC using a 3-D mapping system. 1.Although inferior vena cava (IVC) is known as a possible source of non-PV foci in AF patients, the prevalence is very low.2.Although some previous cases anatomically demonstrated the origin of the trigger from the IVC using a three-dimensional (3-D) mapping system, the definition of the border between the IVC and atrium was unclear.3.This case demonstrated continuous ectopic bigeminy definitely originating from the tiny area within the IVC by mapping ectopic beats both with and without conduction to the atrium from the IVC using a 3-D mapping system.
No takes yet. Share an insight, caveat, or question.
Sakurai et al. (2024) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: