Specifications

VVIR Mode
Indications for the VVIR Mode
The VVIR mode may be indicated for certain patients who have
chronotropic incompetence and an anticipated moderate to high level of
physical activity. Specific indications are as follows:
■
Any symptomatic bradyarrhythmias, but particularly when there is no
significant atrial hemodynamic contribution, as in persistent or
paroxysmal atrial flutter/fibrillation or the presence of giant atria.
■
No evidence of pacemaker syndrome due to loss of atrial contribution
or negative atrial kick.
■
Symptomatic bradycardia where pacing simplicity is the prime
concern, as in cases of senility, terminal disease, inaccessibility to a
follow-up center, or absent retrograde ventriculoatrial (VA)
conduction.
■
Patients in whom it is necessary to disable the atrial circuit (for
example, lead fracture, inappropriate function, and so forth).
■
Certain atrial and ventricular ectopic arrhythmias including chronic
atrial fibrillation and flutter.
Contraindications for the VVIR Mode
The VVIRmodes is contraindicated in the presence of the following
conditions:
■
Known pacemaker syndrome or symptoms produced by temporary
ventricular pacing at the time of initial pacemaker implantation.
■
The need for maximum atrial contribution because of congestive heart
failure or a special need for rate response.
■
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VVIR pacing is particularly contraindicated in the presence of
retrograde VA conduction or when angina pectoris or congestive heart
failure is aggravated by fast rates.