Bachmann's Bundle's Unique Physiology: Reviewing How it Made an Atypical Flutter Even More Atypical.

A 69-year-old man with a history of previous ablation and cardiac surgery was found on cardiac electrophysiology study to have a macro-re-entrant left atrial flutter initially misdiagnosed as a micro-re-entrant right atrial tachycardia resulting from the unique conduction properties of Bachmann's bundle. ().

Metabolic heterogeneous zone assessed by FDG-PET is predictive of postablation mortality in patients with ventricular tachycardia.

Purpose: We sought to study the predictive value of the metabolic heterogeneous zone (HZ) as determined by Fluorodeoxyglucose ( FDG) positron emission tomography (PET) viability studies in ventricular tachycardia (VT) patients.

Methods: PET studies utilizing Rubidium ( Rb) tracer for perfusion and FDG tracer for viability were analyzed using PMOD (PMOD Technologies) and further analyzed using 684-segment plots. FDG uptake was normalized to the area with maximal perfusion on the rest Rb study.

Metabolic Scar Assessment withF-FDG PET: Correlation to Ischemic Ventricular Tachycardia Substrate and Successful Ablation Sites.

The functional and molecular imaging characteristics of ischemic ventricular tachycardia (VT) substrate are incompletely understood. Our objective was to compare regional F-FDG PET tracer uptake with detailed electroanatomic maps (EAMs) in a more extensive series of postinfarction VT patients to define the metabolic properties of VT substrate and successful ablation sites. Three-dimensional (3D) metabolic left ventricular reconstructions were created from perfusion-normalized F-FDG PET images in consecutive patients undergoing VT ablation.