Relationship of bipolar and unipolar electrogram voltage to scar transmurality and composition derived by magnetic resonance imaging in patients with nonischemic cardiomyopathy undergoing VT ablation.
作者： Danna A. Spears , Adrian M. Suszko , Rupin Dalvi , Andrew M. Crean , Joan Ivanov
DOI: 10.1016/J.HRTHM.2012.07.022
关键词:
摘要: Background Bipolar voltage mapping has a role in defining endocardial-based scar postinfarct patients undergoing ventricular tachycardia catheter ablation. The utility of bipolar and unipolar voltages characterizing not been evaluated with nonischemic cardiomyopathy. Objective To relate left (LV) endocardial these to transmurality (endocardial vs nonendocardial) composition (homogeneous core heterogeneous gray). Methods Ten consecutive cardiomyopathy LV ablation were included (age 48 ± 14 years; ejection fraction 43% 15%). Preablation late gadolinium-enhanced magnetic resonance imaging was used quantify gray by using signal-intensity thresholding. Electroanatomic provided voltages. maps rigidly registered order (registration error 3.6 2.9 mm). Results lower than no (P 1.9 mV Conclusions In cardiomyopathy, is dependent on scar, while the influenced across wall as defined imaging.
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