Pacemaker electrode implantation in patients with persistent left superior vena cava.

Area of Science:

• Cardiology
• Medical Devices
• Electrophysiology

Background:

• Permanent VVI pacing is a common treatment for bradyarrhythmias.
• A persistent left superior vena cava (PLSVC) is a rare congenital anomaly that can complicate pacemaker lead implantation.
• Standard lead insertion techniques may be challenging in patients with PLSVC, increasing the risk of malposition or complications.

Purpose of the Study:

• To describe a modified technique for pacemaker lead implantation in patients with a persistent left superior vena cava.
• To evaluate the safety and efficacy of using a pigtail-shaped lead for VVI pacing in this patient population.

Main Methods:

• A retrospective review of 661 consecutive patients undergoing permanent VVI pacing.
• Identification of four patients with a persistent left superior vena cava.
• Description of a technique involving shaping the pacing lead into a pigtail with a 3-4 cm loop to facilitate right ventricular apex lead placement.
• Assessment of lead positioning, procedural success, and complications during follow-up.

Main Results:

• Four out of 661 patients (0.6%) had a persistent left superior vena cava requiring specialized lead insertion.
• Shaping the lead into a pigtail successfully navigated the anomalous venous anatomy and facilitated right ventricular apex lead placement.
• The technique avoided inadvertent coronary sinus cannulation.
• No complications were observed in the four patients during a mean follow-up of three years.

Conclusions:

• Pigtail-shaped pacemaker leads offer a safe and effective solution for VVI pacing in patients with a persistent left superior vena cava.
• This modified approach simplifies lead implantation and reduces the risk of complications associated with anomalous venous anatomy.
• Further studies may be warranted to confirm these findings in a larger cohort.