Modes of Cardiac Pacing:

The classification of bradycardic support pacemakers is complex. The Code used in this report is a four letter code.(table 1)

Table 1:

1st	Paced	Single, Atrial, Both, None
2nd	Sensed	Single, Atrial, Both, None
3rd	Response	Inhibited,triggered,Dual, None
4th	Sensor	Rate Response, None

Some of the pacemaker characteristics that are not covered by this classification include:

• tachycardia response
• rate smoothing
• mode switching
• fallback
• communication for
• programmed parameters
• lead impedance
• battery status
• paced and sensed events
• intracardiac electrograms
• hysterysis
• antitachycardia algorithms,
• rate adaptive A/V delays
• sensed and paced PR interval programming
• safety pacing
• type of sensor
• Magnet response
• lead polarity
• Size
• Longevity
• automatic threshold tracking