HearTwave II Training Program. HearTwave II MTWA Training Program Patient Preparation Performing a Test Main Screen Lead Check Rest Phase (Pre-Exercise)

HearTwave II Training Program

HearTwave II MTWA Training Program Patient Preparation Performing a Test

Main Screen Lead Check Rest Phase (Pre-Exercise) Exercise Phase Recovery Phase

Ending a Test (Monitoring Phase) Printing a Test (Results Displayed) Editing a Report Review Reports Screen and Review Mode Data Management System Setup

Patient Preparation

You’ll Need These Materials

7 Micro V sensors 7 Standard Electrodes 3M™ One Step Skin

Prep Razor Gauze

Patient Preparation

Prep Electrode Locations

Shave to remove all hair from the site.

Gently wipe the skin with a gauze pad if the skin is very oily or moist or has lotion. DO NOT USE ALCOHOL.

GENTLY abrade with 3M Skin Prep. Make sure to abrade an area of skin at least as big as the electrode or sensor.

Patient Preparation

Abrade Electrode Locations Precaution:

ONLY MINIMUM ABRASION IS NEEDED.A good preparation removes only the surface layer of dead skin cells. Excessive abrasion of the skin can increase the risk of contact dermatitis.Never apply electrodes or Alternans Sensors to broken skin.

Apply the electrode or sensor immediately after prepping each site. Make sure to place the electrode or sensor exactly over the area of the skin that you just prepped. Apply the sensor with the tab pointing down.

Rub the electrode or sensor to ensure even contact. After all electrodes and sensors are placed, connect the lead

wires. Insert the tab of the sensor into the lead wire until the black line is just visible.

Make sure that the lead wires are not caught under the belt and are not pulled tight

Patient Preparation

Electrode Placement – Flat Man Attach Micro-V and standard leads in the positions

indicated below.

Patient Preparation

Connecting Patient Cable Leads and Patient Module Connect all electrode

leads taking care to avoid tangled leads. Use lead separators as necessary.

Attach patient leads cable to the patient module.

Attach to patient by securing the belt around the patient’s waist.




Performing a Test: Main Screen

Enter Physician, Technician and Protocol information using simple arrow keys and touchpad for navigation

Select a manual protocol of choice: MTWA Exer, MTWA Pace, MTWA Pharm

With the cursor in the “Patient” field, press “Enter” to open the Patient

Information dialog:




Performing a Test: Lead Check

By pressing “Perform Test” on Heartwave II Main Screen you will enter the Lead Check Screen.

State of the art standard diagnostic 1-mm grid for onscreen interpretation of ECG waveforms. Observe waveforms for low noise and make sure no leads are

“OFF” (indicated in red below lead name) Note the “Lead Noise” display. This provides real time baseline noise

measurements which could possibly interfere with MTWA results. The user can proactively reduce noise during testing thereby

increasing likelihood of determinate results Recommended noise thresholds for rest and exercise phases

are indicated by horizontal lines on the Lead Noise display. Attempt to keep noise below these levels.

Note: It takes about 30 seconds for the lead noise bars to be calculated and displayed.

Performing a Test: Lead Check

If all leads are properly connected, with good electrode-to-skin contact, the screen displays “All Leads OK” with a “Start” button in the lower left corner

If skin prep was not sufficient, then leads on flat man will be color coded in yellow or red to indicate poor impedance. The screen displays “Examine Red/Yellow Leads” and you must re-perform a lead check. As with HearTwave I, overrides are discouraged

You are now ready to begin the rest phase of testing by pressing “START”




Performing a Test: Rest Phase(Pre-Exercise)

Use the dedicated BP/Event function key for documentation of vital patient data

Print a resting 12 lead ECG report for the patient’s record as a baseline measurement

Allow 45 minutes to conduct a complete MTWA test (ensures sufficient time for patient prep, re-prep if required, exercise testing and re-testing if required)

All MTWA protocols can be manually controlled to achieve a smooth gradual increase in heart rate profile for target ranges. As always, adjustment of grade is recommended over speed to minimize noise.




Performing a Test: Rest Phase(Pre-Exercise) For MTWA exercise tests, allow the patient to get

comfortable on the treadmill (without starting the belt). Check and adjust any lead cables that may be pulling

While the patient is moving, observe that the Lead Noise bars are below the EXER level. If noise levels are too high, try to identify the source (usually inadequate patient prep)

Collect at least one minute of rest data Note dedicated custom command keys on keyboard for

frequently used functions: After informing and instructing the patient about the

test, select the green “Start Treadmill” key on the keyboard

Use the red “Stop Treadmill” key to stop the treadmill Press the “Start Exercise” key to initiate the exercise

phase of the test

Performing a Test: Exercise Phase

Note there are two pie graphs on the HearTwave II screen: First Pie (bottom)

2.5 minutes between 100-110 BPM Second Pie (top)

1.5 minutes between 110-120 BPM In an ideal test, the first pie is filled to 100%, and then the

second pie fills to 100%, followed by recovery back to the resting heart rate. If for some reason pies cannot be filled to 100%, it is very important to fill it to at least the 60% marker. A test is likely to be indeterminate if either pie is less than 60% filled

HR Control Messages are displayed to assist with MTWA protocol

Note: As a minimum requirement, at least three minutes of data must be collected to initiate alternans processing and complete a test

Performing a Test: Exercise Phase

New feature: Real-time 3-lead ECG monitoring 8 seconds of diagnostic waveform

display in industry standard leads (II, V2, V5)

Need to focus on only one screen for MTWA testing and patient monitoring

Simple customizable screen setup




Performing a Test: Recovery Phase

After satisfying HR profile requirements, proceed back to recovery allowing the patient’s heart rate to return to 90 bpm (or the resting level if higher)

Make sure at least one minute of recovery data is collected

Ability to continue monitoring patient status using on-screen 3-Lead ECG display

When ready, press the “End/Print” button and select an “End Test” Reason




Ending a Test: Monitoring Phase

Once an end reason is selected, data processing will begin and you will enter “Monitoring” phase

During processing, do not remove leads from patient until report results are displayed. If a result is indeterminate, repeat test after addressing reason for indeterminacy (see Indeterminacy Reference Card)




Printing a Test: Results Displayed

Once processing is complete, the alternans classification results will be displayed in the upper right corner of the screen

Initial interpretation is generated by the automated report classifier (“Interpreted by: Computer”)

Ability to repeat test directly from this screen without re-entering patient data




New Feature: Editing a Report

If desired, user can edit the classifier results by pressing “Reprint and Edit Results” button

Option of changing any of the alternans results parameters and inserting their own comments

Edited results will be saved with user name and date

Report editor is also available through review reports screen




Review Reports Screen and Review Mode

Ability to print alternans reports Ability to edit alternans results Ability to print stress reports Ability to review entire test through

review mode




HearTwave II MTWA Training Program

Patient Preparation Performing a Test



HearTwave II MTWA Training Program System Setup allows the ability to

fully customize common system parameters such as:

ProtocolsCustom TextFinal ReportsScreen setup

Documents

HearTwave II Training Program. HearTwave II MTWA Training Program Patient Preparation Performing a Test Main Screen Lead Check Rest Phase (Pre-Exercise)