Table 1. Effect of shock vector and can position on predicted DFTs and myocardial voltage gradients using standard, two-coil transvenous electrode.
Joules indicate predicted necessary field energy to elevate 95% of myocardial elements to a voltage gradient of 5V/cm or greater.
| Electrode configuration | Joules | % myocardium >30V/cm |
|---|---|---|
| RIC → RV + SVC | 93.2 | 18.4 |
| RIC + SVC → RV | 14.3 | 30.3 |
| RIC + RV → SVC | 22.9 | 32.2 |
| LIC → RV + SVC | 15.1 | 4.9 |
| LIC + SVC → RV *** | 8.3 | 18.3 |
| LIC + RV → SVC | 40.3 | 44.4 |
| RAC + RV → SVC | 10.8 | 19.7 |
| RAC → RV + SVC | 13.4 | 4.0 |
| RAC + SVC → RV | 11.9 | 28.6 |
| LAC + RV → SVC | 10.0 | 27.1 |
| LAC + RV → SVC | 7.5 | 14.3 |
| LAC → RV + SVC | 11.0 | 3.6 |
Can Position Key
LIC: Left infraclavicular
RIC: Right infraclavicular
LAC: Left abdominal
RAC: Right abdominal
Electrode Type Key
RV: 5cm right ventricular electrode
SVC: 8 cm superior vena cava electrode
***
Standard configuration