User's Manual

Indications and Contraindications

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General Indications

The following conditions are regarded as general indications for

pacemaker implantation when they occur together with symptoms such

as syncope, dizziness, reduced physical capacity, or disorientation:

• Sinus node arrest and symptomatic bradycardia with or without an

AV conduction disorder.

• Intermittent or complete AV block.

• Brady-/tachycardia syndrome or other symptoms of sick sinus

syndrome that result in symptomatic bradycardia.

• Supraventricular reentry tachycardias that can be suppressed by

chronic AV-sequential pacing.

• Atrial and ventricular ectopic arrhythmias that can be suppressed

by permanent AV-sequential pacing.

In contrast to a single-chamber pacemaker, a dual-chamber

pacemaker is indicated for patients who require increased cardiac

output. This includes active patients and patients who have

experienced, or are likely to experience, pacemaker syndrome.

An atrial-controlled dual-chamber mode (DDD and VDD) is indicated

for patients who have an intact spontaneous atrial rhythm. Ventricular-

controlled, AV-sequential dual-chamber pacing modes (DDI, DVI and

VDI) are indicated for patients in whom ventricular pulse triggering due

to spontaneous atrial events is not required or desired. Rate-adaptive

pacing is indicated for patients who exhibit chronotropic incompetence

and require increased pacing rates with physical activity.