- Case report
- Open Access
- Open Peer Review
Surgical implantation of a biventricular pacing system via lower half mini sternotomy
© Hosseini et al.; licensee BioMed Central Ltd. 2013
- Received: 12 October 2012
- Accepted: 10 January 2013
- Published: 12 January 2013
We present a case of surgical implantation of biventricular epicardial pacing leads and a defibrillating patch via lower half mini sternotomy. Although median sternotomy is routinely used for this purpose, lower half mini sternotomy could provide the surgeon with the same surgical field exposure and a faster post operative recovery.
- Arrhythmia Therapy
- Pace Maker
- Minimally invasive incision
Transvenous implantation of permanent atrial or ventricular pacing leads is the method of choice in adults. It is a well tolerated procedure that is generally performed with local anesthesia under fluoroscopic control . Right heart leads are placed through the subclavian vein and superior vena cava, while left ventricular lead implant is accomplished percutaneously through coronary sinus cannulation, advancing the lead into a major cardiac vein . Unfortunately, this technique is associated with long fluoroscopy times and is not applicable to all patients because of coronary sinus and coronary venous anatomy limitations .
The optimal pacing system implantation technique in the presence of infected endocardial pacing system or limited venous access to the heart has not yet been defined [4, 5]. Surgical implantation of epicardial pacing leads is an option in children and adults who are not suitable for traditional transvenous approach. While median sternotomy is the common approach for implantation of an epicardial pacing system, other surgical approaches like left lateral thoracotomy , subcostal approach , limited lower sternotomy  and video-assisted thoracic surgery  have also been described. Although median sternotomy provides access to the surface of all chambers of the heart, it may be unnecessary for a full sternotomy. With a left thoracotomy, access to the right side of the heart is restricted and with a subcostal approach difficulty arises if one attempts to implant a defibrillating patch. The limited lower sternotomy technique described in the literature  only allows access to the right atrium and ventricle and not to the left side of the heart. We present a case of surgical implantation of biventricular epicardial pacing leads and defibrillating patch via lower half mini sternotomy.
A 60 year old male presented with Staphylococcus aureous infection of his endocardial pacing system. His past medical history was remarkable for mild dilated cardiomyopathy, ventricular tachycardia, a biventricular endocardial pacing for cardiac resynchronization therapy, and several previous percutaneous endocardial pacing system implantations via the right and the left subclavian veins. The pacing leads and box were removed and the infection was treated with antibiotics. Due to subclavian vein stenosis and pacing box pocket infection, transvenous approach for implantation of a new pacing system proved not to be feasible. Therefore he was referred for surgical implantation of a new epicardial pacing system.
The optimal pacing system implantation technique in the presence of limited venous access to the heart has not yet been defined [4, 5]. Different surgical implantation techniques have been described for different clinical scenarios. Although median sternotomy provides a good access to the surface of all chambers of the heart, it may be unnecessary for a full sternotomy. The limited lower sternotomy technique described in the literature  only allows access to the right atrium and ventricle and not to the left side of the heart. For proper access to the left side of the heart, the mini sternotomy needs to go up to the level of the third intercostal space and then directed toward the left. This allows the surgeon to lift up the heart and have good access to the lateral wall. A smaller skin incision, a more stable sternum, and a better cosmetic result are also important. Bilateral mini thoracotomy could also be considered as an option in similar cases. Our technique could be considered for children, patients with limited venous access to the heart, patients with single ventricle disease, and patients with intracardiac shunts who cannot have a typical transvenous BiV ICD system.
Although a screw-in lead was used for the left ventricle at the time of our operation, it is now recommended to use steroid eluting bipolar leads. To provide an ideal vector, the defibrillating patch should be placed at the posterior aspect of the left ventricle and the pacing box should be implanted at the left side of the abdomen. Due to the limitations of the mini-sternotomy incision, defibrillating patch was implanted on the lateral wall and the pacing box was inserted in the right side of the abdomen. Also based on the current technology, it is now recommended to use an epicardial coil instead of a defibrillating patch.
Written informed consent was obtained from the patient for publication of this Case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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