morphology discrimination
ICD algorithm that analyzes the shape of cardiac electrical signals to distinguish ventricular from supraventricular arrhythmias.
Full Definition
Morphology discrimination is a sophisticated ICD algorithm that compares the morphology (shape and pattern) of incoming electrical signals to baseline ventricular and supraventricular templates stored in the device memory. This discrimination method helps prevent inappropriate shocks by distinguishing between true ventricular arrhythmias requiring therapy and supraventricular tachycardias with aberrant conduction or pre-existing bundle branch block. The algorithm analyzes features such as signal width, amplitude, and pattern matching to make therapy decisions. Modern ICDs combine morphology discrimination with other algorithms like rate and rhythm stability for enhanced accuracy.
Usage
Usage note: Hyphenate as compound modifier: 'morphology-discrimination algorithm'.
In Context
- "Morphology discrimination successfully prevented inappropriate shock delivery during SVT with aberrancy." — Arrhythmia episode analysis
- "The device relied on morphology discrimination to differentiate VT from conducted atrial fibrillation." — ICD interrogation report