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===Arrhythmia detection zones=== | ===Arrhythmia detection zones=== | ||
The ICD diagnoses rhythm disorders by counting intervals on the intracardiac electrogram. This is a rate-based detection scheme that can be adjusted to meet the individual patient’s needs by programming. The ICD counts the current interval as one value and then average of the current interval and the preceding intervals. If these intervals fall into the same category, the event is binned in that category. If both events are tachycardia of fibrillation, but not in the same category, the interval is binned in the higher category. | The ICD diagnoses rhythm disorders by counting intervals on the intracardiac electrogram. This is a rate-based detection scheme that can be adjusted to meet the individual patient’s needs by programming. The ICD counts the current interval as one value and then average of the current interval and the preceding intervals. If these intervals fall into the same category, the event is binned in that category. If both events are tachycardia of fibrillation, but not in the same category, the interval is binned in the higher category. | ||
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!SVT discriminators: | |||
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#Waveform morphology (broad vs. small complex or comparison of morphology with template of normal QRS wave) | |||
#Onset of arrhytmia (sudden vs. slowly) | |||
#Stability of arrhythmia (regular vs. irregular) | |||
#Relationship between P- and R-waves (atrial lead required) | |||
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The arrhythmia detection zone is the category in which a predefined therapy will be given: | The arrhythmia detection zone is the category in which a predefined therapy will be given: | ||