Digital Pulsewave Analyzer



Digital Pulsewave Analysis was used over 130 years ago as an important part of the medical exam. Graphic methods for clinical pulse wave recording were introduced in the 1800’s. Due to software and more sophisticated devices, it is now possible to generate indexes of ventricular vascular interaction:

Digital Pulse Wave Analyzers can show the efficacy of lifestyle modifications, such as diet, exercise, supplementation and pharmaceutical drugs.

A Digital Pulse Wave Analyzer tells a story about:

  • How the blood travels from the large arteries through to the peripheral arteries
  • The ejection of blood from the left ventricle during systole that initiates an arterial pressure wave that travels towards the periphery.
  • How as the heart beats, pressure and flow pulse waves travel away from the heart and are reflected back toward the heart from the arterial system.
  • The aging and disease states associated with an increase in cardiovascular events alter the physical characteristics of blood vessel walls and impair the pulsatile function of the arteries which can provides important prognostic and therapeutic information beyond that provided by traditional blood pressure measurements.

The Meridian DPA provides information on arterial wall stiffness and determines the biological age of the arteries.. This Health Canada approved and FDA cleared, user-friendly, noninvasive device uses a finger probe to observe the changes in pressure, blood flow, velocity and the profile throughout the pulse wave.

Finger probes are $250. A new Meridian DPA is $5,995.  It  has a one year warranty, includes a training and certification course by Dr Harry Elwardt and excel interpretive guide templates supported by Zale Atley and Associates (ZAandA, LLC).  S&H is included within the Continental US. You may pay by bank wire or with a credit card using your verified PayPal account. You may request a Proforma Invoice with bank wire instructions (include your address) or a PayPal Invoice by emailing Dr. Zale Atley at Please give us a call with any questions at (512) 396-0138. Hours are M-F 9AM to 5PM CST.

Cardio-Wave-Analyzer-Small-EditedClick Here for the Medicore CardioWA DPA. It uses the same CPT codes, scans both arterial stiffness and heart rate variability in five minutes, includes the software for your PC, has a one year warranty and a Certification and Training Course for $4,495
It only costs $100 to replace a Finger probe.

The Meridian software which runs on an external computer has two separate scans. Arterial stiffness (also called PTG) relates to the condition of the cardiovascular system and takes one minute. Heart Rate Variability (HRV) is a separate five minute scan that  provides data on the autonomic nervous system. See sample scans (bottom of this page). There is a separate report for each of these scans which allow you to print a standard report in color on an external  printer. You can export the information gathered from either or both  scans to excel and create a customized report.

We have  developed customized spreadsheets that make the operators explanations easier by summarizing the technical information gathered. This is  accomplished by exporting data from the Meridian software running on an  external computer to an excel spreadsheet and transferring that  information into a spreadsheet formatted to meet your requirements. We  provide the templates and support to you as part of your purchase of a  Meridian DPA. We have templates for both the PTG and the HRV scan.

The Meridian DPA software runs on XP, Vista & Windows 7.

The Meridian DPA is FDA 510 (K) cleared and Health Canada approved

DPA’s are Non-Invasive meaning there is no blood and no pain.

DPA printouts have information on the following:

  • Mean Heart rate
  • Missed heart beats (arrhythmias)
  • Level of Arterial Stiffness (7 types)
  • Waveform of PTG
  • Eccentric Constriction (Left Ventricle Ejection Level)
  • Arterial Elasticity
  • Remaining Blood Volume
  • Waveform of HRV
  • Balance of the Autonomic Nervous System (SNS vs PNS)
  • Stress Reaction - our ability to respond quickly, dynamically and effectively to a crisis.
  • Mental Stress
  • Physical Stress
  • (Autonomic balance refers to the type of stress)
  • Score (could be green, orange and red buttons) or an actual number.

DPA’s present the data in various ways with the more expensive units providing data in formats that can be customized and used for research purposes.

For information refer to an article published in the May 2010 Townsend Letter entitled “Breakthrough in Clinical Cardiology: In-Office Assessment with Pulse Wave Velocity (PWV) and Digital Pulse Analysis (DPA)”. CLICK HERE

DPA’s use infrared light sent to the fingertip and obtains pulse wave information with the light absorbing characteristics of Hemoglobin (the HbO2 of arterial blood). The medical terminology for this measurement method is Plethysmogram (PTG).

Our belief is that the use of DPA technology can help caregivers reduce cardiovascular disease in their client populations through early detection and prevention, and ultimately assist to decrease the associated financial costs placed on the health care industry. Cardiovascular disease is the #1 killer for both men & women in the United States with an estimated economic cost of over $300 billion.

DPA’s provide information on arterial wall stiffness and determines the biological age of arteries in less than 3 minutes. FDA cleared, user-friendly, non-invasive DPA devices use a finger probe to observe the changes in pressure, blood flow, velocity and profile throughout the whole pulse wave.

Aging and disease states associated with an increase in cardiovascular events alter the physical characteristics of blood vessel walls and impair the pulsatile function of arteries.

The pulsatile flow is defined ( as that portion of the cardiac cycle controlled by the Autonomic Nervous System which is the part of the nervous system that does not require the brain’s involvement in order to function.

Impaired pulsatile function of arteries provides important predictive and therapeutic information beyond that provided by traditional blood pressure measurements.

Accelerated Plethysmogram (APG) Waveform - The second derivative of PTG - an excellent method to evaluate the biological age of arteries.

Measurements With the Meridian DPA

  • Pulse Rate
  • Ejection time (Etc)
  • Pulse Height (PH) - Pulse amplitude
  • Ejection Elastic Index (EEI)-- indicator of Left Ventricle ejection and elasticity of large arteries
  • Dicrotic Dilation Index (DDI)- indicator of small artery compliance
  • Dicrotic Elastic Index (DEI) - peripheral vessel elasticity (arterioles to veins)
  • Software program to measure Heart Rate Variability (HRV)
  • Software program will store all client information

Meridian DPA Advantages

  • Early detection of arterial wall elasticity and determination of biological arterial age.
  • Software program tests Heart Rate Variability (HRV) in 5 minutes
  • Monitors effectiveness of therapeutic intervention
  • Monitors arterial wall response to lifestyles changes / reduction of cardiovascular risk factors
  • Non-invasive - uses a LED/Photodiode finger probe sensor.
  • The Meridian DPA is FDA 510 (K) cleared and Health Canada approved.
  • Lightweight and portable (12 lbs)
  • User friendly
  • Can be used alone (thermal printer) or interfaced with computer for storage of information
  • Color printout data sheet when interfaced with user's computer/printer
  • Affordable
  • Revenue generator

Learn more about this cost-effective DPA screening device which is easy to use:

  • Help your clients see the results and effects of compliance with your protocols.
  • Allow easy evaluation of the effectiveness of various approaches.

ZAandA, LLC sells the following DPA devices:

  • Smart Pulse   $495
  • CardioWA      $4,495
  • Meridian DPA $5,995
  • SA-3000P       $6,995

A Powerful New Tool for Health Care Professionals

As a health care professional using the DPA, you have a powerful new tool and advanced technology providing you with cardiovascular parameters specific to the health of arteries. In minutes, an easy-to-understand printout is available for identifying cardiovascular disease risk in your clients.

This non-invasive system is capable of measuring arterial compliance. The DPA's sensitivity to early arterial changes builds highly detailed data for assessment in determining whether clients have potential underlying vascular disease, as well as developing an outline for the practitioner of the potential effects of client-specific risk factors.

The DPA was developed specifically for use in mobile events, clinics and trade show events and can easily and successfully become an important tool in your current client recruitment & retention process.

Advanced Technology Arrives In Your Practice

DPA devices measure a pulse waveform produced by the beating heart. Data captured by the DPA during a client test is analyzed and reported in just minutes to provide a clear, concise evaluation tool for health care professionals.

Arterial stiffness indices are particularly important in identifying individuals who exhibit the development of vascular disease, and enables the healthcare professional to begin appropriate treatment long before the symptoms or clinical signs appear. The DPA has many applications including:

  • Hypertension
  • Borderline Hypertension
  • Hyperlipidemial
  • Endothelial Function

Getting started: Simple, quick and painless for practitioner and client

Your practice already has everything you need to begin using a DPA device today, and your clients comfort and ease during the test is assured.

To begin the test, the appropriate client-specific data is collected through a series of questions. As your patient rests comfortably, an arterial finger pulse sensor is placed on the left finger. The instrument's monitor displays the waveform as it is sensed. Once data is collected and analyzed, you simply print the DPA Report(s).

DPA’s are portable and easy-to-use "plug and play" systems that requires no additional accessories or disposable components. Enjoy the following benefits:

  • Minimal capital outlay
  • Low monthly payments
  • Per-patient-test revenue

Reference Ranges

The reference ranges are based on a comparable set of values obtained from similar healthy subjects. It is possible that an abnormal value may be normal for you but they should be discussed with your physician as only they are qualified to make a determination as to the significance and/or make a diagnosis.


One purpose of this screening is to prevent disease before symptoms occur. In those instances where symptoms have developed, laboratory tests results help confirm that a problem does exist. But a normal test result is just as significant as an abnormal result. A normal result does not mean that a test was unnecessary. When a result is normal, it not only helps rule out disease, but is also establishes a baseline "normal". A person's own result is the best baseline for monitoring any change that takes place in the future.

Almost everyone in this country knows about heart disease. They know the importance of prevention, detection, and treatment and the huge impact it has on people's health. But they know very little about vascular disease outside the heart.

Early Detection is Vital

In most cases, with early detection, vascular disease can be treated effectively. The DPA test is a simple screening test that may detect these potential problems, all of which are non-invasive and painless. The beauty of the screening is that it is very simple. The tests do not produce any risk or discomfort for clients, and can be done in a matter of minutes.

Close the window when done to return here for more information.

Click here for a flash presentation of the Meridian DPA as a measurement is made.

This version is higher resolution, takes longer to load and is wider. Same data.

Click here for a clip of the results of a Heart Rate Variability measurement.