Thomas Vogtmann

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Sleep-disordered breathing is one of the most common sleep disorders. Especially obstructive sleep apnea (OSA) is an independent cardiovascular risk factor. Clinical studies have proven a significant association between OSA and atrial fibrillation, the most common cardiac arrhythmia. Currently, there is no proven evidence for causality. Untreated OSA seems(More)
BACKGROUND Left atrial macroreentrant tachycardia (LAMRT) has not been characterized in detail. METHODS AND RESULTS Twenty-eight patients with LAMRT, including 4 patients with ablated typical atrial flutter (AFL), underwent electroanatomic mapping of the left atrium (LA) between February 1999 and October 2001. LA maps were performed during LAMRT in 26(More)
BACKGROUND An abnormal potential (retroPP) from the left posterior Purkinje network has been demonstrated during sinus rhythm (SR) in some patients with idiopathic left ventricular tachycardia (ILVT). We hypothesized that this potential can specifically be identified and be a critical substrate for ILVT. METHODS AND RESULTS In 9 patients with ILVT and 6(More)
AIMS To compare non-gated vs. electrocardiogram (ECG)-gated 64-detector-row computed tomography (MDCT) of the left atrium (LA) for integrated electroanatomic mapping (EAM) in patients with paroxysmal atrial fibrillation (AF). METHODS AND RESULTS Twenty-nine consecutive patients with paroxysmal AF underwent MDCT prior to pulmonary vein isolation (PVI). All(More)
BACKGROUND A high-intensity-focused ultrasound balloon catheter (HIFU-BC) is designed to isolate pulmonary veins (PV) outside the ostia (PV antrum). This catheter uses a parabolic CO2 balloon (behind water balloon) to focus a 20-, 25-, or 30-mm diameter ring of ultrasound forward of the balloon (parallel to catheter shaft). The purpose of this study is to(More)
During recent years, the management of subarachnoid hemorrhage (SAH) has changed, resulting in an increase in early operations and routine administration of nimodipine. Both influenced the indication for transcranial Doppler sonography (TCD). Furthermore, investigations detected discrepancies between Doppler findings and neurological status. In a(More)
AIM Automated, daily Home Monitoring (HM) of pacemaker and implantable cardioverter-defibrillator (ICD) patients can improve patient care. Yet, HM introduction to routine clinical practice is challenged by resource allocation for regular HM data review. We tested the feasibility, safety, workload, and clinical usefulness of a centralized HM model consisting(More)
Pulmonary vein (PV) isolation by elimination of spike potentials has been reported to cure drug refractory atrial fibrillation. Because of the heterogenous morphology of the PVs, sequential electroanatomic reconstruction of the PVs was performed in 39 patients (group A), who underwent subsequent PV isolation by interruption of all conductive myocardial(More)
BACKGROUND Recent studies have shown that cryoablation and radiofrequency (RF) ablation are comparable with regard to success rates and safety in the treatment of common atrial flutter (AFL). Long-term success requires persistence of bidirectional conduction block (BCB) in the inferior cavotricuspid isthmus (CTI). OBJECTIVE The purpose of this study was(More)
AIM Imaging of the left atrium is regularly performed prior to pulmonary vein isolation. The aim of the study was to evaluate the feasibility of contrast-enhanced high-resolution magnetic resonance angiography (MRA) of the left atrium using the blood-pool contrast agent gadofosveset trisodium in comparison to noncontrast MRA. MATERIALS AND METHODS Twenty(More)