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  • 1
    Digitale Medien
    Digitale Medien
    Probing for Mechanisms of Atrial Fibrillation: (2005)
    350 Main Street , Malden , MA 02148-5018 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Journal of cardiovascular electrophysiology 16 (2005), S. 0 
    Details
    ISSN: 1540-8167
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1540-8167.2005.04657.x
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  • 2
    Digitale Medien
    Digitale Medien
    Reversal of Electrical Remodeling After Cardioversion of Persistent Atrial Fibrillation (2004)
    350 Main Street , Malden , MA 02148 , USA , and 9600 Garsington Road , Oxford OX4 2XG , UK . : Blackwell Science Inc
    Journal of cardiovascular electrophysiology 15 (2004), S. 0 
    Details
    ISSN: 1540-8167
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Introduction: In animals, atrial fibrillation results in reversible atrial electrical remodeling manifested as shortening of the atrial effective refractory period, slowing of intra-atrial conduction, and prolongation of sinus node recovery time. There is limited information on changes in these parameters after cardioversion in patients with persistent atrial fibrillation. Methods and Results: Thirty-eight patients who had been in atrial fibrillation for 1 to 12 months underwent electrophysiologic testing 10 minutes and 1 hour after cardioversion. At 1 week, 19 patients still in sinus rhythm returned for repeat testing. Reverse remodeling of the effective refractory period was not uniform across the three atrial sites tested. At the lateral right atrium, there was a highly significant increase in the effective refractory period between 10 minutes and 1 hour after cardioversion (drive cycle length 400 ms: 204 ± 17 ms vs 211 ± 20 ms, drive cycle length 550 ms: 213 ± 18 ms vs 219 ± 23 ms, P 〈 0.001). The effective refractory period at the coronary sinus and distal coronary sinus did not change in the first hour but had increased by 1 week. The corrected sinus node recovery time did not change in the first hour but was shorter at 1 week (606 ± 311 ms vs 408 ± 160 ms, P = 0.009). P wave duration also was shorter at 1 week (135 ± 18 ms vs 129 ± 13 ms, P = 0.04) consistent with increasing atrial conduction velocity. Conclusion: The atrial effective refractory period increases, sinus node function improves, and atrial conduction velocity goes up in the first week after cardioversion of long-standing atrial fibrillation in humans. Reverse electrical remodeling of the effective refractory period occurs at different rates in different regions of the atrium. (J Cardiovasc Electrophysiol, Vol. 15, pp. 507-512, May 2004)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1540-8167.2004.03217.x
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  • 3
    Digitale Medien
    Digitale Medien
    Nonautomatic Focal Atrial Tachycardia:x (2003)
    350 Main Street , Malden , MA 02148-5018 , U.S.A . : Blackwell Publishing Inc
    Pacing and clinical electrophysiology 26 (2003), S. 0 
    Details
    ISSN: 1540-8159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: KAMMERAAD, J.A.E., et al.: Nonautomatic Focal Atrial Tachycardia: Characterization and Ablation of a Poorly Understood Arrhythmia in 38 Patients. Nonautomatic focal atrial tachycardia (NAFAT) is a rare and poorly understood arrhythmia either due to microreentry or triggered mechanism. NAFAT was defined as a focal atrial tachycardia which was inducible with pacing maneuvers in the electrophysiology lab. We reviewed the charts and EP study reports of all 38 patients with NAFAT, who underwent an EP study at our center between April 1994 and September 2000. Patients were predominantly female (n = 31, 82%), aged 11–78 years (median 46). The mean age at presentation was 31 years (range 7–71 years). None of the patients had structural heart disease or had undergone prior heart surgery. Electroanatomic mapping (EAM) was performed in 22 patients and showed no scars in the atrium. A total of 45 foci were identified (range 1–3 foci/patient). Anatomically NAFAT foci were predominantly right atrial (n = 35) rather than left (n = 10) . The NAFAT cycle length ranged from 270 to 490 (mean ± SD; 380 ± 69 ms) and was significantly lower in patients younger than 24 years of age. Ablation, attempted for 42 foci was successful in 33 (79%). The success rate in the EAM group was 20/25 foci (80%) compared to 13/18 (72%) in the non-EAM group. In conclusion, NAFAT is a rare arrhythmia which predominantly affects women with no other associated cardiac disease. It mainly occurs in the right atrium, affects all ages and is amenable to catheter ablation. (PACE 2003; 26:736–742)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.00125.x
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  • 4
    Digitale Medien
    Digitale Medien
    Advantages and Disadvantages of Trial Designs: A Review of Analysis Methods for ICD Studies (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 23 (2000), S. 0 
    Details
    ISSN: 1540-8159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: General modalities of analyses that have, been used for ICD studies are reviewed. Published “typical” examples are briefly described. The historical cohort method is exemplified with previously unpublished data from the Seattle Cardiac Arrest Survivor database. The AVID Study database is used to compare the results obtained from nonrandomized methodologies with randomized methodologies. Particular issues related to the use of the ICD for example, mode of death, inability to blind, selection practice, and treatment decision times make this a natural pedagogic platform.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1540-8159.2000.tb00892.x
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  • 5
    Digitale Medien
    Digitale Medien
    Recipient to Donor Conduction of Atrial Tachycardia Following Orthotopic Heart Transplantation (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 21 (1998), S. 0 
    Details
    ISSN: 1540-8159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: We report a case of atrial tachycardia in a 60-year-old male 8 years postorthotopic heart transplantation. At electrophysiology study, the clinical rhythm was found to arise from the remnant of the recipient atrium and was successfully terminated by delivery of radiofrequencv energy. Surgical scars formed at the anastomosis of the recipient and donor atrium during the time of orthotopic heart transplantation are thought to electrically isolate the two areas. Although rarely recognized, dysrhythmias originating from the recipient atrial remnant may occur more often than previously thought.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1540-8159.1998.tb00201.x
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  • 6
    Digitale Medien
    Digitale Medien
    Supraventricular tachyarrhythmias, congenital heart disease, and sudden cardiac death (1992)
    Springer
    Pediatric cardiology 13 (1992), S. 116-118 
    Details
    ISSN: 1432-1971
    Schlagwort(e): Ventricular fibrillation ; Congenital heart disease ; Sudden death ; Supraventricular tachycardia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The etiologies of sudden cardiac death following the surgical treatment of congenital heart defects remain uncertain. A young patient with prior repair of partial anomalous plumonary venous return is presented, in whom brief episodes of a supraventricular tachyarrhythmia (rate 170/min) were documented to result in ventricular fibrillation. This unusual sequence may represent a basis for unexplained sudden cardiac death in other patients following atrial surgical procedures for the treatment of congenital heart disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00798219
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  • 7
    Digitale Medien
    Digitale Medien
    Arrhythmias in Patients with Congenital Heart Disease (1997)
    Springer
    Cardiac electrophysiology review 1 (1997), S. 237-240 
    Details
    ISSN: 1573-725X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009926710686
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