Emergency Transvenous Pacing


Emergency Transvenous Pacing, Transvenous Pacemaker, Emergency Cardiac Pacing

  • Indications
  1. Alternative to Transcutaneous Pacing
  2. Unstable Bradycardia (e.g. third degree AV Block)
  3. Prolonged transport time with higher likelihood of rhythm decompensation
  4. Myocardial Infarction with new Arrhythmia (LBBB, RBBB, Type II second degree AV Block, Third Degree AV Block)
    1. High risk of fatal Bradycardia (up to 43%)
    2. However, first priority is reperfusion!
  1. Requires only one tenth of the delivered energy (milliamps) as Transcutaneous Pacing
  2. Does not require nearly the same level of sedation and analgesia as Transcutaneous Pacing
  3. Does not generate the significant tracing artifacts seen with Transcutaneous Pacing
  • Technique
  1. Preferred Central Line sites (most direct, least tortuous courses)
    1. Right internal Jugular Vein (preferred)
    2. Left subclavian vein
  2. Place Catheter 6 French sheath (in Pacemaker kit)
    1. Use 6 French instead of 9 French standard Cordis catheter
    2. The larger, 9 French leaks blood and fails to allow adequate Pacemaker wire control
  3. Attach the plastic, accordion sheath
    1. Connect the sheeth hub to the catheter
    2. Wire threaded through the sterile sheath and into the catheter
    3. Test wire balloon by inserting 1.5 cc air prior to insertion (then deflate)
  4. Attach the pacer
    1. Connector cable attached to the Pacemaker wire and to the Pacemaker generator
    2. Non-sterile assistant attaches catheter pins to appropriate terminal on generator (+ to +, - to -)
  5. Thread the wire
    1. Deflate balloon
    2. Pass wire via sterile sheath into 6 French catheter
    3. Wire inserted to the second mark (20 cm)
  6. Advance Wire
    1. Turn on Pacemaker generator once tip has cleared introducer sheath
      1. Rate: 60-80 bpm
      2. Sensitivity: Asynchronous, lowest possible
      3. Output: 5 mA
        1. Some recommend setting to maximal ouput (20 mA) to start
        2. Decrease output once capture occurs (see below)
    2. Reinflate balloon
      1. Inflate balloon with 1.5 cc air and turn stop-cock
      2. Balloon reinflated to allow floating of wire into the right atrium and right ventricle
    3. Advance the wire to the third mark (30 cm)
    4. EKG Monitor (not the EKG machine or alligator clip)
      1. Observe for electrical and mechanical capture
      2. Electrical tracing will show a Pacemaker spike followed by Wide QRS (LBBB appearance)
      3. Heart Rate will increase from Bradycardia to pacer rate at capture
        1. Palpate pulse or auscultate heart sounds
        2. Oxygen Saturation waveform
        3. Bedside Ultrasound of heart
    5. Troubleshooting problems passing through the tricuspid valve
      1. Short Stature patient
        1. Withdraw the introducer by small increments and reattempt
      2. Tricuspid regurgitation pushes balloon backwards into right atrium
        1. Consider threading without balloon inflated
      3. Consider alternative access site other than internal Jugular Vein
        1. Subclavian line
        2. Femoral line
  7. Deflate balloon
    1. Open stopcock and allow balloon to deflate spontaneously (syringe fills with air)
    2. If capture lost, reinflate balloon and advance again
  8. Secure catheter and pacer
    1. Extend sheath to cover pacing catheter and tighten the associated valve
  9. Consider confirming lead placement with Bedside Ultrasound
    1. Use Subxiphoid Echocardiogram View
  10. Adjust Pacemaker generator
    1. Decrease pacer output until capture is lost (typically 0.3 mA or less)
      1. Increase again until capture occurs and to approximately 2.5 times lowest capture threshold
  • References
  1. Bessman in Roberts (2014) Roberts and Hedges Emergency Procedures, Elsevier, Philadelphia, p. 277-97
  2. Kwon and Warrington (2016) Crit Dec Emerg Med 30(9):10-11
  3. Orman and Bellezzo in Herbert (2016) EM:Rap 16(4): 8-9
  4. Sacchetti in Herbert (2017) EM:Rap 17(5): 1-2