Research:
Pressure-Volume Systems: PVAN Data Analysis Software
PVAN Data Analysis Software
Millar's PVAN software provides a powerful, easy-to-use method for investigators to calculate the hemodynamic parameters of the P-V data generated by the Millar Pressure Volume Systems.
 Demo Version is Now Available.
Please login as a registered user to download the software.
PVAN opens the text files generated by the data acquisition software and applies a variety of algorithms to the P-V data to calculate over thirty different hemodynamic parameters.
| Parameters Calculated by PVAN Software |
| HR |
Heart Rate |
Ea |
Arterial Elastance |
dP/dt min |
Minimum dP/dt |
| Vmax |
Maximum Volume |
CO |
Cardiac Output |
dV/dt max |
Maximum dV/dt |
| Vmin |
Minimum Volume |
SW |
Stroke Work |
dV/dt min |
Minimum dV/dt |
| Ves |
End-Systolic Volume |
SV |
Stroke Volume |
P@dP/dt max |
Pressure at dP/dt Max |
| Ved |
End-Diastolic Volume |
EF |
Ejection Fraction |
P@dV/dt max |
Pressure at dV/dt Max |
| Pmax |
Maximum Pressure |
PRSW |
Preload Recruitable SW |
V@dP/dt max |
Volume at dP/dt Max |
| Pmin |
Minimum Pressure |
ESPVR |
End-Systolic P-V Relationship |
V@dP/dt min |
Volume at dP/dt Min |
| Pes |
End-Systolic Pressure |
EDPVR |
End-Diastolic P-V Relationship |
Tau (Weiss) |
Tau-Weiss Method |
| Ped |
End-Diastolic Pressure |
E(t) |
Time Varying Max. Elastance |
Tau (Glantz) |
Tau-Glantz Method |
| Ees |
End-Systolic Elastance |
dP/dt max |
Maximum dP/dt |
Tau (Logistic) |
Tau-Logistic Method |
The calculated hemodynamic parameters serve as indicators of cardiovascular performance in response to different interventions (genetic mutations, drugs, occlusions, etc.). PVAN offers the investigator the opportunity to convert data to units of true volume if the data are recorded RVUs.
PVAN contains an intuitive user menu that offers easy access to a variety of displays and calculation tables for several cardiovascular parameters. A saline calibration feature allows the user to obtain a value for the parallel conductance volume contribution of the myocardium.
PVAN allows seamless integrated access from ADInstruments Chart. Data can be recorded through Chart 5.4.2 and imported into PVAN by clicking the 'P' Heart icon in the Chart toolbar.
Data may be easily exported to spreadsheets or
text files, and graphical information can be placed into presentations
or papers for publication.
PVAN 3.6 has an easy to use interface that calculates the volume calibration equation. Select the cuvette size and catheter, and then enter at least three sets of values into the well table. The slope and y-intercept values will be calculated and automatically entered into the volume calibration screen.
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