software module, ecg software, blood pressure analysis, ep catheter

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.