Video Assisted Pericardioscopic Surgery: Minimal-invasive Implantation of Epimyocardial Pacemaker Leads in Humans

Overview

Particularly in CRT (Cardiac Resynchronisation Therapy), limited accessibility of the coronary sinus along with its branches and the mismatch between the region of latest left ventricular (LV) contraction and an adequate epimyocardial vein frequently lead to therapy failure and might even be responsible for the 30 % non-responders, although this aspect has not been thoroughly investigated yet. Further complications such as postoperative micro- (i.e. increased thresholds) or macro-dislodgement (i.e. loss of stimulation success) of the LV electrodes are frequent complications leading to reoperation or a change of strategy. The current transthoracic epimyocardial approach via mini-thoracotomy circumvents the aforesaid obstacles and is regarded as the first-choice alternative approach. Participation in the trial would prevent patients from this invasive, transthoracic approach and at the same time allow the same degree of freedom in lead placement. Risks and complications are in this case comparable to the open surgical approach but with a lower risk of intraoperative rib fracture, postoperative pain with consecutive pulmonary hypo-ventilation and pneumonia. Apart from the benefit of the single individual, societies benefit will include a much higher responder rate in CRT patients and less lead-associated infections. Thoracotomy with breach of the pleural cavity and single lung ventilation - a procedure that itself bears a high risk for postoperative atelectasis, pleural effusion and infection will be avoided. In patients on hemo-dialysis and patients who suffer from an infected pacemaker-system, extravascular lead placement should be preferred. Again, the current open, transthoracic epimyocardial approach via mini-thoracotomy is regarded as the first-choice alternative approach. Aim of this study is the validation of the feasibility of an alternative, minimal-invasive therapy method for implanting a cardiac pacemaker.

Treatment: Video- assisted pericardioscopic surgery for implanting epimyocardial pacemaker leads Abridged Operation Protocol: 10 mm skin incision below the xiphoid process, blunt preparation towards the pericardial sac, insertion of the endoscope-carrying trocar, opening of the pericardium with endoscopic forceps, standardised inspection of the pericardial cavity, insertion of the bipolar Stingray® electrode via the endoscope working channel into pericardial space, implantation of the electrode into designated epimyocardial site under endoscopic vision, pacing measurements sensing, impedance, pacing threshold, interventricular delay (in CRT), panoramic fluoroscopy for future controls, retraction of the endoscope/trocar, subcutaneous tunnelling and connection of the respective electrode to: * existing, infraclavicular CRT device, suture in layers, wound dressing * a single- or dual-chamber pacemaker device implanted epigastrically, suture in layers, wound dressing