Journal: European Heart Journal: Case Reports

Article Title: A case report of right bundle branch block and junctional beats during ablation at the right ventricle outflow tract: metallic occluder’s unanticipated effect

doi: 10.1093/ehjcr/ytae054

Figure Lengend Snippet: Electrophysiological study and radiofrequency catheter ablation in the right ventricular outflow tract. ( A ) Baseline and electrograms in right ventricular outflow tract on intracardiac electrocardiogram. ( B ) Three-dimensional electroanatomic mapping of local right ventricular outflow tract (arrow shows the earliest activation in this area); ( C ) right bundle branch block (arrows) and junctional beat (arrowheads) during radiofrequency catheter ablation at the first target; ( D ) the location of the ablation catheter and the occluder on fluoroscopy. ( E and F ) The earliest electrogram in right ventricular outflow tract on intracardiac electrocardiogram ( E ) and three-dimensional electroanatomic mapping ( F ), arrow shows the earliest activation. ( G ) High-frequency potential (transverse line) and His bundle potential (arrows) in right ventricular outflow tract. ( H ) Three-dimensional electroanatomic mapping of the occluder, the dot target represents the His bundle potential. HPS, His–Purkinje system; LAO, light anterior oblique; RAO, right anterior oblique.

Article Snippet: Activation mapping was performed using an irrigated ablation catheter (OmniCool, APT Medical Inc, China) in conjunction with a three-dimensional (3D) electroanatomic mapping system (HT Viewer, APT Medical Inc, China).

Techniques: Activation Assay, Blocking Assay

Journal: European Heart Journal: Case Reports

Article Title: A case report of right bundle branch block and junctional beats during ablation at the right ventricle outflow tract: metallic occluder’s unanticipated effect

doi: 10.1093/ehjcr/ytae054

Figure Lengend Snippet: Electrophysiological study and radiofrequency catheter ablation in the left ventricular outflow tract. ( A and C ) The earliest electrogram in left ventricular outflow tract on intracardiac electrocardiogram ( A ) and three-dimensional electroanatomic mapping ( C ). The arrow in A shows the high-frequency potential, and the arrowhead shows the His bundle potential. The arrow from A to C shows the earliest activation. ( B and D ) The earliest electrogram above right coronary cusp on intracardiac electrocardiogram ( B ) and three-dimensional electroanatomic mapping ( D ). LAO, light anterior oblique; RAO, right anterior oblique.

Article Snippet: Activation mapping was performed using an irrigated ablation catheter (OmniCool, APT Medical Inc, China) in conjunction with a three-dimensional (3D) electroanatomic mapping system (HT Viewer, APT Medical Inc, China).

Techniques: Activation Assay

Journal: Europace

Article Title: Efficacy and safety of pulsed field ablation for accessory pathways: a pilot study

doi: 10.1093/europace/euae139

Figure Lengend Snippet: Successful ablation of AP at LALW. ( A ) AVRT was induced after RVA pacing. From top to bottom, the following tracings are displayed: surface ECG, CS electrograms from proximal (CS 9–10 ) to distal (CS 1–2 ), distal (HB 1–2 ), and proximal (HB 3–4 ) His bundle electrograms, distal (Bi-Abl) bipolar and unipolar (Uni-Abl) recording from the PFA catheter, and RVA electrograms. Earliest retrograde atrial activation with bipolar recording was at LALW during RVA pacing navigated by 3D electroanatomical mapping ( B , green point) and fluoroscopy ( C ), and the morphology of unipolar electrograms of ERAA was QS. Note the distinct APP inserting (orange arrow) between ERAA (black arrow) and retrograde ventricular activation (V). Successful ablation was achieved after one pulse train delivery ( D , 1-PFA modality), and three pulse train deliveries ( E , 3-PFA modality) at the same AS were applied. ( F ) Transient AV conduction block for a short period after the adenosine injection, then left ventricular pacing confirmed terminating conduction over AP. Bonus lesions (red points) were created near the target with 3-PFA modality. Sustained AP conduction termination was observed by RVA pacing. Abl, ablation catheter; AP, accessory pathway; APP, accessory pathway potential; AS, ablation site; AVRT, atrioventricular reentrant tachycardia; CS, coronary sinus; ERAA, earliest retrograde atrial activation; LALW, left anterolateral wall; LAO, left anterior oblique; LL, left lateral; MA, mitral annulus; PFA, pulsed field ablation; RAO, right anterior oblique; RVA, right ventricular apex.

Article Snippet: The image of TA or MA, HB, and CS was labelled when the PFA catheter moved along the cavity surface guided by a three-dimensional electroanatomical mapping system (3D-EAMS, ColumbusTM 3D EP Navigation system, Shanghai MicroPort EP MedTech Co., Ltd., China).

Techniques: Activation Assay, Blocking Assay, Injection

Journal:

Article Title: Prolonged RV Endocardial Activation Duration: A Novel Marker of Arrhythmogenic Right Ventricular Dysplasia/ /Cardiomyopathy

doi: 10.1016/j.hrthm.2009.02.031

Figure Lengend Snippet: Postero-anterior view of electroanatomic voltage map (right) and activation map (left) from a patient with ARVD/C is shown. Small amount of scarring and low voltage is seen in the subtricuspid region. Note the delayed local activation time at the RV outflow tract of 77 msec despite normal endocardial voltage at the same location. (Catheter location is marked by the green circle).

Article Snippet: The study population included 28 consecutive patients who underwent electrophysiologic study including 3D electroanatomic mapping as a part of their evaluation for ARVD/C at the Johns Hopkins ARVD/C center.

Techniques: Activation Assay

Journal: Journal of Arrhythmia

Article Title: Using coronary sinus ostium as the reference for the slow pathway ablation of atrioventricular nodal reentrant tachycardia in children

doi: 10.1002/joa3.12379

Figure Lengend Snippet: Electroanatomic mapping and SP cryoablation in a patient with AVNRT showing a right anterior oblique view of the right atrium and the CSO. Red balls, HB cloud; Light blue dots, successful ablation sites. Measurements: CSO height and width (12 × 10 mm); from the lowest recorded HB recording to the CSO 12 o'clock site (His‐CS12): 24 mm. The success ablation site vertical location is 37% (counting from the CSO floor; ie, between the middle and lower two third of the KT) of the total length from the HB to CSO floor (black double arrow line passing through the ablation site). A transparent protractor (seen at the side) is aligned to the center of CS ostium to obtain the direction (red arrow) of the success ablation site. In this case, it is at 30° or 2:00 o'clock direction (red arrow) with CSO viewed as a clock. SP, slow pathway; AVNRT, atrioventricular nodal reentrant tachycardia; CSO, coronary sinus ostium. HB, His bundle

Article Snippet: A deflectable 6‐Fr decapolar electrode catheter was advanced from femoral vein into inferior vena cava, right atrium, superior vena cava, and CS under the guidance of the St. Jude Medical NAVX ® or Precision ® 3‐D electroanatomic mapping system (St. Jude Medical).

Techniques: