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  • 1
    Electronic Resource
    Electronic Resource
    Pacing in Sick Sinus Syndrome-Need for a Prospective, Randomized Trial Comparing Atrial with Dual Chamber Pacing (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 21 (1998), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.1998.tb00174.x
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  • 2
    Electronic Resource
    Electronic Resource
    Sinus and Paced P Wave Duration and Dispersion as Predictors of Atrial Fibrillation After Pacemaker Implantation in Patients with Isolated Sick Sinus Syndrome (2004)
    350 Main Street , Malden , MA 02148-5018 , USA and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Futura Publishing, Inc.
    Pacing and clinical electrophysiology 27 (2004), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of this study was to prospectively evaluate the sinus and the paced P wave duration and dispersion as predictors of AF after pacemaker implantation in patients with isolated sick sinus syndrome (SSS). The study included 109 (69 women, mean age 72 ± 11 years) patients with SSS, 59 with bradycardia-tachycardia syndrome (BTS). A 12-lead ECG was recorded before pacemaker implantation and during high right atrial and septal right atrial pacing at 70 and 100 beats/min. The ECGs were scanned into a computer and analyzed on screen. The patients were treated with AAIR (n = 52) or DDDR pacing. The P wave duration was measured in each lead and mean P wave duration and P wave dispersion were calculated for each ECG. AF during follow-up was defined as: AF in an ECG at or between follow-up visits; an atrial high rate episode with a rate of ≥220 beats/min for ≥5 minutes, atrial sensing with a rate of ≥170 beats/min in ≥5% of total counted beats, mode-switching in ≥5% of total time recorded, or a mode switching episode of ≥5 minutes recorded by the pacemaker telemetry. The ECG parameters were correlated to AF during follow-up. Mean follow-up was 1.5 ± 0.9 years. None of the ECG parameters differed between patients with AF and patients without AF during follow-up, nor was there any difference between groups after correction for BTS and age. BTS was the strongest predictor of AF during follow-up (P 〈 0.001). P wave duration and dispersion measured before and during pacemaker implantation were not predictive of AF after pacemaker implantation in patients with isolated SSS. (PACE 2004; 27:606–614)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.2004.00494.x
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  • 3
    Electronic Resource
    Electronic Resource
    AV Block and Changes in Pacing Mode During Long-Term Follow-Up of 399 Consecutive Patients with Sick Sinus Syndrome Treated with an AAI/AAIR Pacemaker (2001)
    Oxford, UK : Blackwell Futura Publishing, Inc.
    Pacing and clinical electrophysiology 24 (2001), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: KRISTENSEN, L., et al.: AV Block and Changes in Pacing Mode During Long-Term Follow-Up of 399 Consecutive Patients with Sick Sinus Syndrome Treated with an AAI/AAIR Pacemaker. This retrospective study included a large cohort of consecutive patients primarily implanted at Skejby University Hospital with an AAI/AAIR pacemaker because of sick sinus syndrome (SSS) from July 1981 to July 1999. The primary aim of the study was to analyze the risk of developing AV block during long-term follow-up. A secondary aim was to study the incidence and reasons for changes in pacing mode caused by other than AV block. A total of 399 patients (231 women, mean age 71 ± 13.5 years) were identified. Mean follow-up was 4.6 ± 3.4 years and occurred at death, reoperation with mode change, pacemaker explant, or end of study. During follow-up, 44 patients had a ventricular lead implanted with a mean delay of 2.8 ± 3.1 years (range 1 day-10.4 years) after the primary implantation. A total of 30 patients received a ventricular lead because of AV block or AF with bradycardia (annual incidence 1.7%). Another 14 patients received a ventricular lead without having documented AV block or AF with pauses (annual incidence 0.8%). The present observational study documents that in patients with SSS treated with AAI/AAIR pacing, AV block requiring implantation of a ventricular lead occurs at a rate of 1.7% per year. It is considered that AAI/AAIR pacing is safe and reliable as treatment for patients with SSS and normal AV conduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2001.00358.x
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  • 4
    Electronic Resource
    Electronic Resource
    Transluminal catheter implanted prosthetic heart valves (1998)
    Springer
    The international journal of angiology 7 (1998), S. 102-106 
    Details
    ISSN: 1615-5939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Implantation of prosthetic heart valves requires open heart surgery. Recently, two new artificial heart valves have been developed for implantation by a transluminal catheter technique without using thoracotomy or extracorporal circulation. A balloon-expandable, biological stent valve was developed in Europe and implanted in 70–80 kg pigs. Implantation was performed in the descending thoracic aorta (n=6), in the ascending aorta (n=5), and in the left ventricular outflow tract (n=4). A mechanical cage-ball, self-expandable stent valve was developed in the USA and implanted in 21–27 kg dogs in the left ventricular outflow tract (n=12). Acute hemodynamic and angiographic studies showed that catheter implantation of artificial heart valves is feasible and the valves were competent. Complications were related to partial restriction of coronary flow caused by the biological valve, and embolization of parts of the mechanical valve. However, these early experimental studies indicate that the development of a biological and a mechanical-prosthetic aortic valve for transcatheter placement is feasible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01618379
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  • 5
    Electronic Resource
    Electronic Resource
    Sinus Node Dysfunction (1999)
    Springer
    Cardiac electrophysiology review 2 (1999), S. 358-360 
    Details
    ISSN: 1573-725X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009959532689
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