A comparison of electrocardiographic imaging based on two source types.

摘要: The aim of the study to compare performance two major source types involved in imaging electric activity heart on basis potential differences observed thorax. images depict either timing activation and repolarization myocardium or field a surface closely encompassing myocardium. depolarization closed bounding ventricular was derived from measured body potentials (BSPs), an MRI-based volume conductor model comprising geometry thorax, lungs, S h, cavities. solution constrained by using template local transmembrane (TMPs). latter serve as strength Equivalent Double Layer (EDL) (SM), which used compute h (epicardium endocardium). second SM is distribution epicardium Sp, referred here Potential Distribution (EPD). Its estimated directly BSPs. inflection points electrograms (ELGs) were taken markers repolarization. endocardial fields both sources exhibited qualitative similarity, did ELGs. With reference one generated EDL source, magnitude EPD smaller, downslopes ELGs lower. EDL-based highly correlated with those TMP templates, EPD-based correlation For corresponding test values indicated insufficient similarity. EDL- variants deserve be studied alongside each other future development electrocardiographic imaging.