Heart Rate Variability contest on the web only used heart rate data to detect Sleep Apnea and Paroxysmal Atrial Fibrillation.   added 12/29/01

Narcolepsy and Heart Rate Variability - ?? added 11/29/01

HRV possibilities in the new millennium - added 10/17/01

HRV Congress Courses  added 10/17/01

Two HRV graphs during sleep from Heart Rate Variability Congress   added 10/06/01

Computers in Cardiology Conference Sept 2001 added 10/07/01
This web site has just the titles of papers on Heart Rate Variability, Atrial Fibrilation, and Arrythmia   

HeartMath Institute "Over the years we have experimented with different psychological and physiological measures, but it was consistently heart rate variability, or heart rhythms, that stood out as the most dynamic and reflective of inner emotional states and stress."  added 09/27/01

Heart Rate Variability Congress added 09/26/01
virtual  congress started Sept 10, 2001 with 21 topic areas and about 200 papers  

Heart Rate Variability - Skyaid Watch-type device being developed to predict sudden cardiac arrest by another company - private communications for now - more news Oct 2001.  added 08/25/01

Heart Rate Variability 18 recent abstracts  added 07/15/01

Heart Rate Variability Software 
www.adinstruments.com/cust/ products/software/hrv.html
added 06/30/01

Heart rate ceases to vary after an ischemic stroke. The heart rate normally appears to vary by 0.3 Hz. This lack of heart rate variation should be noticed by a Skyaid Watch. A neurologist may need to look at the heart rate variability data to determine if the Skyaid Watch wearer has just experienced an ischemic and a call should to be made for to get him to a stroke care center so that the tPA treatment can be applied within 2 hours.  The graphic is from the May 1999 issue of Stroke Journal   added 12/10/00 

HRV Predict Heart Failure?  This abstract of a French article has 17 people dieing of heart failure while their hearts were being monitored.  It appears that heart rate variability computed by the Skyaid Watch might allow prediction of heart failure prior to sudden cardiac arrest.  added 3/09/01

 Heart Rate Variability was monitored preceding  cardiac arrest -
  in FRENCH, rough translation into English  has graphics and English abstract 
figure captions are in both French and English. added 4/13/01

HRV Study summary of Oct 1998 Circulation:  
Researchers followed the group for a little over one year. 
During that time fifty four patients died.  
About half (51.4 percent) of the patients with little variability in their heart rates died, 
while only 5.5 percent of patients with normal variability died.

A Sudden Cardiac Arrest is proceeded by a speeding up (tachyarryhthmia) 80% of the time or slowing down (bradyarrhythmia) somewhat less than 20% of the time. This speeding/slowing down may be detectable by the Skyaid Watch. If so, the Skyaid Watch could inform the wearer when a sudden cardiac arrest is eminent.   From page 250 of Conn's Current Therapy 2000: latest approved methods of treatment for the practicing physician - by Robert Rakel M.D. added 09/19/00

HRV measurement by Biopac Systems product - with waveforms 

HRV as biofeedback monitor to reduce stress - also provides a good overview

HRV Prognostic  American College Cardiology 1996

HRV and Sleep apnea  Cardiology Journal Nov 1996 

HRV and breath - some very detailed waveforms (long time to download) 

HRV as a prognostic - ongoing research at Wash. Univ. at  St. Louis

HRV: A Key Indicator of Autonomic Function nice description of what causes the variation 
- with many waveforms 

HRV and SIDS: SIDS is just one reason that HRV can decrease 

Dunbar: SIDS might be able to be predicted by Heart Rate Variability analysis

HRV Dardik 8/26/00 includes SIDS

HRV Book published in 1995  

HRV - Doctor's viewpoint  

Predict SCD by short term heart rate variability? alternans  April 1999 8/18/00

Heart Care in U.S., Britain, Canada, and Germany    added 3/10/01

HRV misc abstracts: heart attack, stroke, infant, etc.  added 3/09/01

Heart Rate Variability is reduced {PDF file 90KBytes} (a strong predictor of death) 
if heart attack victim is later depressed or anxious.   American Heart Journal 2000   added 2/04/01

Many papers indicate that decrease in Heart Rate Variability indicates 
10X likelihood to get another heart attack
Chinese monitor pulse at wrist to determine health = Pulse Diagnosis
http://www.botanicum.com/acuahmedresearch141.html
The Secret of Chinese Pulse Diagnosis by Bob Flaws $30

Heart Rate Variability references from LifeShirt web site   added 12/24/00

Heart Rate Variability (HRV) and SIDS  
in an English abstract from a German paper in March 2000  8/4/00