P380 THE REEL‘S SYNDROME : A RARE COMPLICATION AFTER PACEMAKER IMPLANTATION

We report the case of a 83–year–old male who underwent single chamber pacemaker implantation in another center for bradyarrhythmia (atrial fibrillation) symptomatic for syncope. A ventricular lead was implanted in the apical septum, the post–procedural posterior–anterior chest radiograph showed correct placement of the leads and generator. Approximately 4 months after the implant, the patient came to our observation for repeated electric pulsations in his left shoulder. The patient was affected by mild dementia and was asymptomatic except for the presenting symptomatology, in particular he denied a history of syncope. The ECG showed arrhythmia due to atrial fibrillation, ventricular undersensing, and lack of ventricular capture (Figure 1). The chest X–ray showed the complete dislodgement of the ventricular lead tip apparently into the vein secondary to the rotation of the pulse generator on its transverse axis with consecutive coiling of the lead (Fig. 2). These findings were consistent with Reel syndrome The patient was admitted to undergo a lead repositioning attempt in consideration of the recent first implant. During the surgery, however, it was shown that the lead was completely displaced from the venous system, near the pectoral muscle. This extreme dislocation of the lead has been related to the electric pulsations felt by the patient. We proceeded with a new re–implantation of the lead and removal of the previous one. The lead was firmly tied to the pectoral muscle with 2 silk points with slight traction control of optimal fixation. Reel‘s syndrome is a variant of the better known Twiddler syndrome, characterized by the coiling of catheters along the transverse axis of the pacemaker. It is often a complication due to the manipulation of the generator by the patient, unlike Twiddler syndrome it occurs early and the leads remain intact. This syndrome is one of the most serious complications of pacemaker or defibrillator implants, it can be potentially fatal due to lack of therapy in the case of defibrillators, or asystole in pacemaker–dependent patients.

P177 A SHOT TO THE HEART

We report the case of a 50–year–old man who, during a wild bird hunt, was accidentally fired with a shotgun loaded with pellets which hit the chest, the neck and the face of the hunter. The patient was taken to the emergency room, tachypnoic and suffering from chest pain, systolic blood pressure was 150/70 mmHg, SpO2 88%, analgesic therapy, liquids administration and O2 therapy were performed with moderate response. On physical examination there was a reduced vesicular murmur in middle field on the right, no heart murmurs; noticeable edema of face and neck soft tissues and absence of evident jugular turgor. The ECG showed sinus rhythm, HR 100/min, morphology at the limit for ST slightly rigid in the inferior site. He underwent a total body CT in which a shotgun pellet was found located at the heart base near the right atrium, with associated pericardial fluid, with a maximum thickness of about 10 mm, with blood density. A shotgun pellet was also found in the apical segment of the right upper lung lobe with associated parenchymal ground glass (the pellet site of passage) without pneumothorax and pleural effusion. CT also showed multiple hunting pellets in the soft tissues of the face and of the neck without significant lesions. The echocardiogram confirmed the presence of circumferential pericardial effusion of mild degree, but progressively worsening, mainly represented along the cardiac apex and the inferolateral wall, but without signs of cardiac tamponade (right atrium within limits, absence of significant Doppler variation in blood flow across cardiac valves). The hospital where the patient arrived was at a distance of 30 minutes from the cardiac surgery, therefore the patient was urgently transferred to the cardiac surgery room of the hub (distance of 30 minutes). Fortunately, the patient maintained hemodynamic stability and arrived in the operating room with good blood pressure, but with a pre–tamponade effusion. The man quickly underwentcardiac surgery, the pericardial effusion was drained and the responsible breach was found in at the atrio–caval junction and successfully sutured. The patient was discharged in the 6th day and currently is in good clinical condition.

[Experimental results of the use of hyaluronic acid based materials (CV Seprafilm and CV Sepracoat) in postoperative pericardial adhesions]

Repeat cardiac surgical procedures are associated with increased technical difficulty and risk related to the presence of dense adhesions between the heart and the surrounding tissues. We examined the efficacy of a bioabsorbable membrane containing hyaluronic acid in the prevention of pericardial adhesions in 23 rabbits. After thoracotomy and pericardiotomy the animals were divided in three groups: Group 1 (9 animals) in which the epicardial surfaces were covered by Seprafilm membrane, Group 2 (9 animals) treated with both Seprafilm membrane and Sepracoat solution, and Group 3 (5 animals) as controls. The animals were reexplored at 10, 30 and 60 days: no intrapericardial adhesions were found in all the animals of Group 2. In 4 animals (44%) of Group 1 localized post-operative adhesions were detected, in absence of epicardial hyperplasia; in contrast, dense and diffuse adhesions were present in all the control animals. The use of the bioabsorbable membrane Seprafilm significantly reduces adhesion formation even if better results are possible with the previous intrapericardial administration of Sepracoat solution. Application of these biocompatible products could reduce the technical difficulty and risk of repeat surgical procedures.

Application of the Cajal-De Castro method to the laser scanning confocal microscope in studying the peripheral nervous system

We tested the Cajal-De Castro method with the Laser Scanning Confocal Microscope (LSCM). This method is a valid investigatory tool for anatomical-morphological study and for the tridimensional reconstruction of the structures of the peripheral nervous system. The combination technique makes it possible to exploit the properties of reflection and fluorescence of the deposited reduced silver. The quantity of which is dependent on the different tissue affinity. On the other hand, since scanning in fluorescence is not selective, both the nerve structures and the surrounding tissue are evidenced and the structures that demonstrate more specific affinity for silver salt are more prominent. Being able to study the preparations using both methods contemporaneously makes it possible to obtain very significant tridimensional images that abound in detail. The Cajal-De Castro method also offers interesting possibilities in the morphometric field and in image analysis.