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.

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.

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.

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.

Heart Rate Variability
Heart Rate Variability is analyzed in both Time Domain and Frequency.

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.

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.

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.

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.