 |
 |
|
| T-Wave Alternans Unknown for the past 40 years, T-Wave Alternans (TWA) in excess of 20 micro-volts have been in Holter recordings but have been undetected. TWA is a strong predictor of V-Tach and other serious cardiac abnormalities. It takes less than 10-seconds to do a complete 24-hour TWA analysis. You can check for TWA anywhere in teh 24-hour ECG file. Not only can you detect TWA in the ECG file, this software lets you view the ECG showing the actual TWA, so that you can verify and validate the presence of real TWA.
The TWA algorithm detects two modes of TWA. Mode 1 is the beat-to-beat change in T-Wave amplitudes exceeding 20 micro-volts, as shown in the adjacent picture. Mode 2 is the gradual up and down changes of T-wave amplitudes over a series of several beats.
|
;)
|
| QT Dispersion QT Dispersion is the difference in ms from the Min and Max QT over 3 successvie beats. Quite often a doctor is interested in the QT Dispersion during an ST Episode or just prior to a V-Tach.
The above display shows the vertical markers for measuring the QT intevals as well as a visual verification for the doctor. The QT Dispersion number is shown at the top of the ECG display and is printed on the corresponding 12-Lead ECG Strip.
|
;)
|
| 24 Hour Vectorcardiograms Use the 300-3 Mini-Digital Holter recorder with the XYZ lead configuration and you can perform Vectorcardiography from any part of the 24-Hour Holter recording. The VCG program provides a unique display and printout of the XYZ ECG leads with 3 vector planes displayed in the same time dimension as the ECG. You can select any arrhythmia or ST time period and generate a vectorcardiography report using the same data that generated the abnormal ECG.
The VCG report can help the clinician determine the foci of a VE beat, provide assistance with borderline ST changes, help determine the end of T-wave, etc.
|
;)
|
| SAECG Late Potentials This is unique in Holter ECG. The first 10-minutes of the 300-7 recording has a frequency response of 0.05 to 500.0 Hz. The sample rate for the SAECG file is 1024 samples per second for each ECG channel. These are the minimum requriements of the American and European Heart Associations for diagnostic SAECG Late Potentials. The continuous high sample rate of the 300-3 recorder allows this software to process an SAECG at any time period in the 24-Hour Holter recording. The filtered QRS is determined by a computer algorithm. If you desire, you can edit the beginning and ending QRS markers. The section at the end of the QRS that is designated for SAECG Late Potential analysis is color-coded. This gives the user a visual verification that the analysis is being conducted in the appropriate area.
The computer algorithm reports analysis of Standard QRS width, Filtered QRS width (fQRS), LAS<40uV and Last 40ms. A positive SAECG test is generall y considered to ba a fQRS in excess of 113ms.
|
;)
|
| Heart Rate Variability Heart Rate Variability is analyzed in both Time Domain and Frequency.
The top of the HRV display shows the Poincare-Lorenz scatter plots. The lower left shows the Frequency power graph. The range boundaries for LF, LF and HF can be adjusted. The lower right shows the Time Domain histogram. Day and night times can be entered for Sleep Apnea and for A-Fib.
|
;)
|
| HRV-Autonomic Nervous System The 3D Power Graph is made up of 288 individual 5-minute power graphs. The 3D graph provides an instant picture of the detailed amount of HRV.
A medication management program shows the doctor the effects of drug therapy on frequency power for various time intervals. Frequency power numbers are compared to normal power ranges in the printed HRV report.
|
;)
|
| Atrial Fibrillation Atrial Fibrillation has become an ever increasing concern for the cardiology clinician. Holter ECG is an excellent test for detecting transient a-fib. The purpose of a Holter A-Fib technology is to detect the minutes of A-Fib rhythm and what the heart rates are associated with A-Fib activity. The red area in the above graph shows about 6 hours of A-Fib rhythm. You can move the cursor to any minute of the 24-hour trend graph and visually verify the series oir A-Fib rhythm for the minute of ECG data. An icon allows for all SVE beats to be deleted for all A-Fib minutes.
Serial comparisons of the A-Fib reports are an excellent long-term management tool for measuring the A-Fib status of the patient.
|
;)
|
| 12-Lead ST Analysis All 12 Leads are analyzed independently. The ST level is measured at either the J point or the ST point. Both the J point and the ST are analyzed for each lead.
You can select any of the 12 leads for the display at the left side of the screen. The long, vertical cursor can be moved to any minute and 2 superimposed ECGs are shown for each lead. The green ECG is the 0 reference baseline and the white ECG is selected by the cursor. This allows for instant viewing of delta ST changes for any lead.
|
;)
|
| Page Scan Full Disclosure The Page Scan shows a 24 hour trend graph across the top of the screen. You can click on any area of the graph and the ECG from that time will appear on the screen. A green box cursor will appear on the ECG data. Click on any ECG and an enlarged view of the ECG will appear on the bottom of the screen. This screen strip can be adjusted to show however many channels you desire by dragging it up or down. On the above example, we are showing 4 of the 12 leads of ECG.
You can edit, select strips, increase the gain and label strips in this screen.
|
;)
|
Requirements: Windows XP Operating System,4 USB Ports minimum, 512MB RAM, 128MB graphics memory, DVD or CD R-W for file storage and 20GB Hard Disk Drive Back to List |
©
Copyright 2005 dms-service LLC, All Rights Reserved
|