How to place a transvenous pacer?

Equipment

• Essential:
  • Sterile central line kit (introducer sheath, dilator)
  • Transvenous pacing wire with inflatable balloon
  • Pacer generator (with ability to set asynchronous mode, rate, output, and sensitivity)
• Optional: Ultrasound machine for real-time guidance, additional suturing supplies

Positioning and Landmarks

• Position: Supine with head slightly turned; prepare as for a central line
• Landmarks/US: Prefer right internal jugular vein or left subclavian for a direct course to the right ventricle; use ultrasound guidance to confirm venous access and anatomy ¹³

Analgesia/Sedation

Option	When	Key note
Local anesthesia (lidocaine)	At puncture site	Ensures patient comfort during venous access
Ultrasound-guided superficial cervical plexus block	If additional analgesia is needed	Provides effective pain control with minimal sedation requirements 4

Steps

1. Prepare and Access: Prep the patient in sterile fashion as for a central line and gain venous access (typically via the right IJ or left subclavian) with ultrasound if available. Insert the introducer sheath ¹².
2. Wire Preparation: Verify the integrity of the pacing catheter’s balloon; attach the sterile sheath over the pacer wire and test/inflate the balloon with 1.5 mL of air.
3. Connect and Set Generator: Attach the pacer wire (using the connector or alligator clip) to the appropriate “V” lead on the pacing unit. Program the pacemaker to asynchronous mode with a rate around 80 bpm and a maximum initial output (usually 20 mA) with low sensitivity ¹³.
4. Advancement Under Guidance: Slowly advance the pacer wire about 15 cm while monitoring ECG:
   • In the atrium, expect large P waves but negative deflections.
   • In the right ventricle, note smaller, positive P waves and a negative, larger QRS.
   • When contact with the ventricular wall occurs, ECG changes (increased amplitude, ST elevation) indicate capture ¹⁴.
5. Confirm Capture and Secure: Once electrical and mechanical capture is achieved (assessed by ECG, pulse palpation, or ultrasound), deflate the balloon, record the wire depth, and secure the catheter with sutures. Adjust the pacing output by turning down the current until capture is lost, then set to 2.5 times that threshold to ensure reliable capture.
6. Post-procedure Confirmation: Confirm catheter placement with a chest x‑ray and re-check mechanical capture via ultrasound or pulse verification.

Post-procedure

• Confirm: Verify electrical capture on the monitor and look for mechanical capture (via pulse or ultrasound) ¹.
• Aftercare: Secure the pacer wire and maintain sterile dressing; document the insertion depth.
• Re-check: Continuously monitor the patient’s rhythm and hemodynamics, and adjust settings as needed.

¹