Holger Gueldner

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Our experience with 121 coronary vein (CV) leads in 116 patients shows that CV leads are the leads of choice for pacing the left ventricle (LV). The information gained from pre-operative venous angiography permits individual selection of the most appropriate lead model for each case. The use of steerable electrophysiology catheters facilitates guide(More)
BACKGROUND Sinus node dysfunction is a frequent complication of Fontan-type procedure. Epicardial pacing is considered as the standard treatment for these patients. METHODS AND RESULTS We evaluated an endocardial approach in seven patients using a 4.1 French bipolar lumenless lead (SelectSecure) that is positioned through a steerable guiding catheter.(More)
BACKGROUND Securing transvenous left ventricular (LV) pacing leads without an active fixation mechanism in proximal coronary vein (CV) segments is usually challenging and frequently impossible. We investigated how active fixation leads can be safely implanted in this location, how to avoid perforating the free wall of the CV, and how to recognize and(More)
BACKGROUND Cardiac transplantation remains the gold standard for treating end-stage heart failure. However, because of donor shortage and posttransplant complications alternative options are needed. METHODS We investigated the impact of cardiac resynchronization therapy on clinical outcome in 545 patients with left bundle-branch block and interventricular(More)
The experience of 579 patients with left ventricular pacing specific characteristics of various leads and lead types for left ventricular stimulation are reported. After describing the advantages of coronary vein (CV) leads versus epicardial lead usage for left ventricular stimulation, commercially available CV leads are introduced and discussed. Since(More)
BACKGROUND Because after tricuspid valve replacement (TVR) the transvenous implantation of endocardial leads is contraindicated, myocardial screw-in leads were used to ventricular pacing. Recently available coronary vein (CV) leads are stimulating the left ventricle epicardially and can be implanted transvenously, too. METHOD AND RESULTS We implanted(More)
In partially controllable multi-level converters the displacement power factor range and the voltage transfer ratio boundaries depend on the number of converter levels. Partially controllable multi-level converters are characterized by asymmetric power flow capabilities. Part count, blocking voltage requirements, and the boundaries and stability of circuit(More)
We report the case of a 56-year-old male heart transplant recipient, who underwent postoperative pacemaker implantation through a left sided superior vena cava (LSVC) via anonymous vein. We describe our successful management of this case. We suggest that the specific anatomic conditions should be considered in all heart transplant recipients with LSVC if(More)
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