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VVI Pacemaker (vvi + pacemaker)

Distribution by Scientific Domains
Medical Sciences100%

Selected Abstracts

Pacemaker Memory Data Compared to Twenty-Four-Hour Holter Monitoring in Patients with VVI Pacemakers and Chronic Atrial Fibrillation

ANNALS OF NONINVASIVE ELECTROCARDIOLOGY, Issue 3 2005
Michal Chudzik M.D., Ph.D.
Background: In light of the results from the AFFIRM trial, the "rate control" strategy has become an accepted treatment modality for patients with atrial fibrillation (AF). Establishing effective rate control requires long-term monitoring of the heart rate. The aim of the study was to compare the heart rate and rhythm monitoring capabilities of the pacemaker memory data (PMD) algorithm and traditional twenty-four-hour Holter monitoring. Methods: The study included 55 patients with chronic AF and a permanent VVI pacemaker. The mean and maximum heart rate as well as the percentage of sensed and paced events obtained from the twenty-four-hour Holter were compared with the results retrieved from PMD, started simultaneously. The study was performed over two consecutive days with pacemakers programmed in VVI 40 and 80 bpm mode. Results: Data retrieved from PMD regarding percentage of sensed and paced episodes as well as mean heart rate strongly correlated with data obtained from twenty-four-hour Holter monitoring. The maximum heart rate reported by PMD was significantly higher than that found in the Holter. Conclusions: PMD provides accurate information regarding long-term monitoring of heart rate in patients with AF who have an implanted permanent pacemaker and thus may facilitate optimized drug therapy to achieve rate control of AF. [source]

Biventricular Pacing for Severe Mitral Reguritation Following Atrioventrgicular Nodal Ablation

PACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 2p1 2003
PATRICK J.S. DISNEY
DISNEY, P.J.S., et al.: Biventricular Pacing for Severe Mitral Regurgitation Following Atrioventricular Nodal Ablation. A 69-year-old woman developed acute pulmonary edema and severe mitral regurgitation (MR) 2 days following an uncomplicated AV nodal (AVN) ablation and insertion of VVI pacemaker for chronic atrial fibrillation. There was no history of significant mitral valve disease. Left ventricular function was normal and there was no evidence of an acute cardiac ischemic event. Transthoracic echo and right heart catheterization studies showed reduction in the severity of MR with biventricular pacing as opposed to RV pacing alone. A permanent pacemaker configured for biventricular pacing was implanted with complete resolution of symptoms and significant reduction in degree of MR. (PACE 2003; 26[Pt. I]:643,644) [source]

Pro arrhythmic Effects of Ibutilide in a Canine Model of Pacing Induced Cardiomyopathy

PACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 2 2000
MING-HSIUNG HSIEH
The authors developed a canine model of pacing induced cardio my apathy to study the possible mechanisms of ibutilide induced torsades de pointes (TP) in heart failure. Thirteen dogs received intravenous ibutilide after acute AV block for 60 minutes, and after implantation of a VVI pacemaker, with a rate of 270 beats/min for 2,3 weeks. Twelve-lead ECG and right and left ventricle monophasic action potentials were recorded at different right ventricle pacing cycle lengths from 600 ms to 1200 ms during the study. The results showed ibutilide could significantly prolong ventricular repolarization and increase the dispersion in a dose dependent and reverse use dependent manner. Furthermore, after ihutilide administration, cardiomyopathic dogs had a greater dispersion of ventricular repolarization, and also had higher incidences of early afterdepolarizations and spontaneous or pacing induced TP than acute AV block dogs. [source]

Pacemaker Memory Data Compared to Twenty-Four-Hour Holter Monitoring in Patients with VVI Pacemakers and Chronic Atrial Fibrillation

ANNALS OF NONINVASIVE ELECTROCARDIOLOGY, Issue 3 2005
Michal Chudzik M.D., Ph.D.
Background: In light of the results from the AFFIRM trial, the "rate control" strategy has become an accepted treatment modality for patients with atrial fibrillation (AF). Establishing effective rate control requires long-term monitoring of the heart rate. The aim of the study was to compare the heart rate and rhythm monitoring capabilities of the pacemaker memory data (PMD) algorithm and traditional twenty-four-hour Holter monitoring. Methods: The study included 55 patients with chronic AF and a permanent VVI pacemaker. The mean and maximum heart rate as well as the percentage of sensed and paced events obtained from the twenty-four-hour Holter were compared with the results retrieved from PMD, started simultaneously. The study was performed over two consecutive days with pacemakers programmed in VVI 40 and 80 bpm mode. Results: Data retrieved from PMD regarding percentage of sensed and paced episodes as well as mean heart rate strongly correlated with data obtained from twenty-four-hour Holter monitoring. The maximum heart rate reported by PMD was significantly higher than that found in the Holter. Conclusions: PMD provides accurate information regarding long-term monitoring of heart rate in patients with AF who have an implanted permanent pacemaker and thus may facilitate optimized drug therapy to achieve rate control of AF. [source]