• Using sterile preparation with Seldinger percutaneous entry
technique into veins or an artery, electrode catheters are advanced
to the heart through vascular sheaths, and positioned using fluoroscopy.
• Catheters are connected to recording equipment and filter box
to allow electrogram display and recording; real-time and review
mode of tracings available.
• Catheter positioning is optimized based on size of electrograms
recorded, pacing capture thresholds, and anatomic positioning.
• For diagnostic purposes, pacing may initiate reentrant cardiac
arrhythmias, allowing interpretation of mechanism of tachycardia.
• Mapping may be performed to precisely localize critical part
of tachycardia circuit, or origin of automatic arrhythmia;
performed in ...