Advanced
Technical
IVT
shock impedance vector
Electrical resistance measurement along the specific pathway used for defibrillation energy delivery in ICD systems.
Full Definition
The measured electrical impedance along the defibrillation pathway in an ICD or CRT-D system, typically between the shock coil electrodes and the pulse generator case or other designated electrodes. Shock impedance vector measurements help assess lead integrity, proper electrode positioning, and predict defibrillation efficacy. Normal shock impedance values typically range from 30-80 ohms, with values outside this range potentially indicating lead problems or suboptimal electrode positioning.
Usage
Usage note: Specify the electrode configuration and measured value with units (ohms).
In Context
- "The shock impedance vector measured 45 ohms, within normal parameters." — Device interrogation report
- "Elevated shock impedance vector values may indicate lead insulation failure." — Troubleshooting guide
Also known as
defibrillation impedance vector
Don't confuse with
pacing impedance
shock vector configuration