intracardiac electrograms  (Abbott Laboratories)

Journal: Europace

Article Title: Mapping and ablation outcomes of extra-pulmonary vein triggers in atrial fibrillation: single-centre retrospective study with consistent provocation protocol

doi: 10.1093/europace/euaf225

Figure Lengend Snippet: Representative example of an induced ExPVT from the LA septum during isoproterenol provocation test. ( A ) Intracardiac electrograms showing AF initiation by an ExPVT induced during provocation. The earliest activation (circle marked by a pointed arrow) is recorded by the circular mapping catheter positioned at the LA septum, consistent with panels D and E . ( B ) Fluoroscopic image (AP view) showing a left atriogram with pulmonary venogram and initial positioning of multielectrode diagnostic catheters. ( C ) Standardized catheter configuration (AP view) during provocation testing, including a quadripolar catheter in the SVC, a decapolar across the high RA and septum, and a duodecapolar along the CS and low RA. A PV mapping catheter, typically positioned at the LA posterior wall, varied in type depending on availability, operator preference, and patient characteristics. ( D ) Electroanatomical activation map identifying the earliest trigger point (white arrow) of the ExPVT from the LA septum. ( E ) Electroanatomical voltage map showing a low-voltage area at the LA septum compatible with the AF trigger site. Abbreviations: AF, atrial fibrillation; AP, anterior posterior; CS, coronary sinus; ExPVT, extra-pulmonary vein trigger; HRA, high right atrium; LA, left atrium; LRA, low right atrium; PV, pulmonary vein; RA, right atrium; SR, sinus rhythm; SVC, superior vena cava.

Article Snippet: Intracardiac electrograms were recorded using the Prucka CardioLabTM Electrophysiology system (General Electric Medical Systems, Inc., Milwaukee, WI, USA), and 3D electro-anatomical maps were created with the NavX (Abbott, Inc., Chicago, IL, USA) or CARTO (Biosense Webster, Diamond Bar, CA, USA) systems, using a PV-mapping catheter (Reflexion Spiral, AdvisorTM FL Circular, or HD Grid from Abbott, Inc.; AFocus, Lasso, PentaRay, or OctaRay from Biosense Webster, Inc.) through a long sheath.

Techniques: Activation Assay, Diagnostic Assay

Journal: HeartRhythm Case Reports

Article Title: Local abnormal atrial activity related to right septal intra-atrial reentrant tachycardia after mitral valve surgery

doi: 10.1016/j.hrcr.2020.12.011

Figure Lengend Snippet: A: Three-dimensional voltage map of the right atrium (RA) acquired using the CARTO system (Biosense Webster, Diamond Bar, CA). A bipolar electrogram amplitude of 0.5 mV was defined as low voltage, and sites with a low voltage were designated as scarred areas. A low-voltage zone was observed in the posterior septum of the RA. PA = posteroanterior. B: An intracardiac electrogram during sinus rhythm (first and second beats) and atrial pacing unmask the local abnormal atrial activity (LAATA), indicated by red arrows. C: Catheter positions for in situ recording of the LAATA related to right septal atrial tachycardia in the fluoroscopic images. CS = coronary sinus; LAO = left anterior oblique; RAO = right anterior oblique. D: An intracardiac electrogram at the initiation of atrial tachycardia. Red arrows indicate LAATAs with a decremental property during atrial program stimulations using a PentaRay catheter (Biosense Webster, Diamond Bar, CA).

Article Snippet: A: An intracardiac electrogram recorded in a PentaRay catheter (Biosense Webster, Diamond Bar, CA).

Techniques: Activity Assay, In Situ

Journal: HeartRhythm Case Reports

Article Title: Local abnormal atrial activity related to right septal intra-atrial reentrant tachycardia after mitral valve surgery

doi: 10.1016/j.hrcr.2020.12.011

Figure Lengend Snippet: Three-dimensional activation map, using the CARTO system (Biosense Webster, Diamond Bar, CA), during atrial tachycardia. A: An intracardiac electrogram recorded in a PentaRay catheter (Biosense Webster, Diamond Bar, CA). CS = coronary sinus. B: Orange arrows indicate the propagation of atrial tachycardia upward from the lower to upper posterior right atrial septum, along the narrow conduction channel. LA = left atrium; LSPV = left superior pulmonary vein; PA = posteroanterior; SVC = superior vena cava. C: An intracardiac electrogram recorded in the upper posterior right atrial septum.

Article Snippet: A: An intracardiac electrogram recorded in a PentaRay catheter (Biosense Webster, Diamond Bar, CA).

Techniques: Activation Assay

Journal: HeartRhythm Case Reports

Article Title: Temporal elimination of an interatrial epicardial connection by ablation encircling the right-sided pulmonary veins

doi: 10.1016/j.hrcr.2020.08.006

Figure Lengend Snippet: A: Activation map in the left atrium during sinus rhythm before ablation. The white arrow indicates the carina breakthrough. B: Intracardiac electrograms during the sixth radiofrequency (RF) application. C: Intracardiac electrograms before and after the sixth RF application, and the 3-dimensional image showing the location of the ablation and Lasso catheters (Biosense Webster, Inc, Diamond Bar, CA) at the sixth RF application. The earliest site of the pulmonary vein potential ( white star ) shifted from the carina region (Lasso 11–12) to the posterior antrum (Lasso 3–4). ABL = ablation catheter; CS = coronary sinus; d = distal; LAA = left atrial appendage; LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein; p = proximal; RA = right atrium; RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein; SVC = superior vena cava.

Article Snippet: C: Intracardiac electrograms before and after the sixth RF application, and the 3-dimensional image showing the location of the ablation and Lasso catheters (Biosense Webster, Inc, Diamond Bar, CA) at the sixth RF application.

Techniques: Activation Assay

Journal: HeartRhythm Case Reports

Article Title: Temporal elimination of an interatrial epicardial connection by ablation encircling the right-sided pulmonary veins

doi: 10.1016/j.hrcr.2020.08.006

Figure Lengend Snippet: A: Activation map of both atria during pacing from the right-sided pulmonary vein (PV) carina. The earliest site was the posterior right atrium. The purple tag indicates the pacing site. B: Three-dimensional image, intracardiac electrograms during sinus rhythm and pacing from the right-sided PV carina, and fluoroscopic images at the successful ablation site. High-frequency potentials were recorded by the ablation catheter at the successful site during both sinus rhythm and pacing from the right-sided PV carina. A radiofrequency (RF) application at the yellow tag successfully isolated the right-sided PVs. Red tags indicate RF applications made before the yellow tag, which resulted only in delay of the PV potentials. C: Intracardiac electrograms after RF application started at the successful site. PV potentials disappeared immediately after RF application started. ABL = ablation catheter; CS = coronary sinus; d = distal; LAO = left anterior oblique view; p = proximal; RA = right atrium; RAO = right anterior oblique view; RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein; SVC = superior vena cava.

Article Snippet: C: Intracardiac electrograms before and after the sixth RF application, and the 3-dimensional image showing the location of the ablation and Lasso catheters (Biosense Webster, Inc, Diamond Bar, CA) at the sixth RF application.

Techniques: Activation Assay, Isolation