Journal: HeartRhythm Case Reports

Article Title: Transient chronotropic incompetence owing to sinus node modification after superior vena cava isolation – A rare complication

doi: 10.1016/j.hrcr.2026.02.008

Figure Lengend Snippet: LAO and RAO views of the right atrium as demonstrated by CARDIO 3D mapping (CARTO 3, Biosense-Webster). Black tags mark the location of phrenic nerve capture; red tags mark the points of ablation. LAO = left anterior oblique; RAO = right anterior oblique.

Article Snippet: LAO and RAO views of the right atrium as demonstrated by CARDIO 3D mapping (CARTO 3, Biosense-Webster).

Techniques:

Journal: HeartRhythm Case Reports

Article Title: High-definition mapping of permanent junctional reciprocating tachycardia: Deeper insights into atrial activation and branching

doi: 10.1016/j.hrcr.2026.01.024

Figure Lengend Snippet: High-density 3-dimensional mapping of the atrial activation during PJRT, with depiction of the 3 diastolic potentials (sometimes recorded at the same area). 1 = area of a first potential possibly represented by the accessory pathway potential of the CS musculature (878 EGMs). 2 = area of a second potential probably represented by the CS musculature (6978 EGMs). 3 = remaining atrial activation (666 EGMs) (see text for explanation). Left : White tracings : Lead II and reference potential (CS). Red and blue tracings : Example of local bipolar ( red ) and unipolar ( blue ) EGMs from the corresponding area ( white arrow ). Gray tracing : “Trend” averaging the local EGMs from the same area. Green tracings: CS activation. Right : Inferior view of the right atrium and proximal coronary sinus. CS = coronary sinus; EGM = electrogram; PJRT = permanent junctional reciprocating tachycardia.

Article Snippet: Unfortunately, the tachycardia recurred days afterward, and a new procedure was planned using high-density 3D mapping (Rhythmia, Boston Scientific, Inc.).

Techniques: Activation Assay