Action Potential Analysis Module
The purpose of the Action Potential (MAP) Analysis Module is to compute physiologic parameters from action potential data. The graph above represents a typical action potential signal and its derivative as they would appear on the monitor. Automated validation marks for Upstroke (EDV), Maximum Slope Mark, Peak, Plateau and Recovery Marks are shown. The validation marks provide visual, real-time verification of the accuracy of the system.
The list below describes the parameters calculated by the analysis module either in real-time or during subsequent analysis.
Model PNM-MAP100W
| Name |
| Definition |
| Num |
| The number of the cardiac cycle. |
| Max |
| The Maximum Voltage that occurred during a cardiac cycle. |
| EDV |
| The voltage prior to the upstroke of the action potential. |
| Min |
| The minimum voltage that occurred during a cardiac cycle. |
| Plto |
| The plateau voltage. |
| Amp |
| PLTO minus EDV. |
| Rate |
| The beats-per-minute. |
| +dV |
| The maximum positive rate of change that occurred. |
| -dV |
| The maximum negative rate of change that occurred. |
| REC1 |
| The time, in milliseconds, from the beginning of the upstroke of the action potential, to the point where the signal drops below the level corresponding to the % Recovery 1 level. |
| xR1 |
| The number of cycles that did not reach the % Recovery 1 level, within the logging period. |
| REC2 |
| The time, in milliseconds, from the beginning of the upstroke of the action potential, to the point where the signal drops below the level corresponding to the % Recovery 2 level. |
| xR2 |
| The number of cycles that did not reach the % Recovery 2 level, within the logging period. |
| REC3 |
| The time, in milliseconds, from the beginning of the upstroke of the action potential, to the point where the signal drops below the level corresponding to the % Recovery 3 level. |
| xR3 |
| The number of cycles that did not reach the % Recovery 3 level, within the logging period. |
| %Max |
| The time, in milliseconds, from the beginning of the upstroke of the action potential, to the point where the signal recovers to 100% or as close to 100% as possible. |
| Time |
| The time interval between action potentials. |
| Cnt |
| The number of cycles in the logging period. |
| RiseT |
| The time, in milliseconds, between the EDV and Max points. |