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Activation patterns and electrophysiological characteristics of Marshall Bundle related left atrial tachycardias post atrial fibrillation ablation

HeartRhythm

Epicardial Marshall bundle (MB) are frequently utilized in left atrial tachycardias (LATs) post atrial fibrillation (AF) ablation with pulmonary vein isolation and substrate modification.

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Wide Complex Tachycardia -- VT, SVT, or A Fib with RVR? If SVT, is it AVNRT or AVRT?

Dr. Smith's ECG Blog

male with pertinent past medical history including Atrial fibrillation, atrial flutter, cardiomyopathy, Pulmonary Embolism, and hypertension presented to the Emergency Department via ambulance for respiratory distress and tachycardia. Description : Regular Wide Complex Tachycardia at a rate of about 160.

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PO-03-100 EARLY ONSET ATRIAL FIBRILLATION AND CATECHOLAMINERGIC POLYMORPHIC VENTRICULAR TACHYCARDIA WITH TRIADIN MUTATION IN A TACTICAL ATHLETE

HeartRhythm

Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare disorder presenting as exercise-induced ventricular arrhythmias, rarely associated with mutations in triadin (TRDN).

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Ventricular Fibrillation, ICD, LBBB, QRS of 210 ms, Positive Smith Modified Sgarbossa Criteria, and Pacemaker-Mediated Tachycardia

Dr. Smith's ECG Blog

So it must be atrial fibrillation. Then I always look to see if the initial deflection of the QRS has a lot of voltage change per change in time (seen in tachycardias that are initiated from above the ventricle because the propagate through fast conducting purkinje fiber. Pacemaker mediated tachycardia!

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PO-05-084 BIATRIAL ATRIAL TACHYCARDIA DURING ABLATION OF SPATIOTEMPORAL DISPERSION ABLATION REGIONS IN PATIENTS WITH PERSISTENT ATRIAL FIBRILLATION

HeartRhythm

Biatrial atrial tachycardia (BiAT) is a rare form of atypical macro-reentrant AT (MRAT) that can be difficult to characterize and ablate. Ablation of regions demonstrating spatiotemporal dispersion (SD) has shown a high rate of atrial fibrillation (AF) termination to either sinus or MRAT during ablation.

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PO-05-157 CHARACTERIZATION OF ATRIAL TACHYCARDIA FOLLOWING ABLATION OF SPATIOTEMPORAL DISPERSION ABLATION REGIONS IN PATIENTS WITH PERSISTENT ATRIAL FIBRILLATION

HeartRhythm

Ablation of regions demonstrating spatiotemporal dispersion (SD) has been demonstrated as an alternative strategy beyond pulmonary vein isolation in patients with persistent atrial fibrillation. Occurrence of atrial tachycardia (AT) following ablation remains a limitation of this approach.

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Wide complex tachycardia, resistant to cardioversion. Some fascinating features here.

Dr. Smith's ECG Blog

Here is her ECG: Regular Wide Complex Tachycardia. Regular means it can't be atrial fibrillation --Most regular wide complex tachcardia are VT, especially if the patient has poor LV function, as in this case. Could it be atrial tachycardia with RBBB and LPFB aberrancy? What do you think? What do you want to do?