The paradoxical (delayed) activation of the inter-ventricular septum during dual chamber pacing is thought to limit outflow tract narrowing by decreasing the projection of the ventricular septum into the outflow tract and its dynamic obstruction (15).
used both asynchronous ventricular stimulation, triggered by a native atrial complex, and synchronous dual chamber pacing.
Numerous studies of dual chamber pacing have yielded conflicting results.
In reference to mitral regurgitation (MR), which is closely tied to LVOT obstruction and symptoms in HCM, a study of 23 patients revealed that dual chamber pacing significantly reduces LVOT gradient and the regurgitant volume in the absence of organic mitral valve abnormalities (other than leaflet elongation) (29).
NYSE:MDT) today announced that reducing right ventricular pacing to less than 10 percent in patients with dual chamber pacemakers reduced the relative risk of developing persistent atrial fibrillation (AF) by 40 percent compared with conventional dual chamber pacing in a trial of more than 1,000 patients with sinus node disease.
This is the first study to demonstrate a clear superiority of newer forms of dual chamber pacing for sinus node disease versus older pacemaker technology," said Dr.
7 years in the study, 68 patients who received conventional dual chamber pacing developed persistent AF (12.
The VENTAK AV device is the company's newest implantable defibrillator and offers dual chamber pacing capability in addition to a full range of therapies to treat abnormally rapid heart rhythms referred to as tachyarrhythmias.