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Heart rate variability guide carefusion

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Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval.

Other terms used include: "cycle length variability", "RR variability" (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and RR is the interval between successive Rs), and "heart period variability".

See also Heart rate turbulence, Sinus rhythm.

Methods used to detect beats include: ECG, blood pressure, ballistocardiograms,[1][2] and the pulse wave signal derived from a photoplethysmograph (PPG). ECG is considered superior because it provides a clear waveform, which makes it easier to exclude heartbeats not originating in the sinoatrial node. The term "NN" is used in place of RR to emphasize the fact that the processed beats are "normal" beats.

Publié dans : Santé & Médecine
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Heart rate variability guide carefusion

  1. 1. Heart Rate Variability Guide Randy Clare Respiratory Diagnostics 2016
  2. 2. Normal HRV Normal Poincaré Plot Has variability to react to the physiologic changes that the body is going through during sleep
  3. 3. Heart Rate Variability • The Poincaré Plot ◦ X-axis :: measure of the current RR interval ◦ Y-axis :: measure of the next RR interval Current RRn Interval (x-axis) Next RR Interval (RRn+1) (y-axis)
  4. 4. Bradycardia - Normal Sinus Rhythm, where heart rate is below 60 bpm - All of the points shift to the upper right - Display’s INCREASED time between R-R intervals
  5. 5. Tachycardia ◦ All of the points shift to the lower left ◦ Display’s DECREASED time between R- R intervals
  6. 6. -“Dot” Pattern represents pacemaker -NO variability from the patient -Heart rate totally controlled by pacer Pacemaker
  7. 7. On Demand Pacemaker ◦ Controlled Rhythm ◦ Not much variance
  8. 8. OSA – Brady/Tachy • Typical Pattern for OSA patient ◦ HR DECREASES during Apneic Event ◦ HR INCREASES after Apneic Event Decreased HR Increased HR
  9. 9. Obstructive Sleep Apnea “Fan” Pattern • Wide variations in R-wave interval • Typical OSA Patient pattern • Data points vary from Tachycardia (lower left corner) to Bradycardia (upper right corner) Tachycardia Points Bradycardia Points
  10. 10. OSA Patient Pre-Treatment
  11. 11. OSA Patient Post Treatment
  12. 12. Nox T3 by CareFusion, For Sleep Disordered Breathing (SDB) © 2015 CareFusion Corporation or one of its subsidiaries. All rights reserved.
  13. 13. Overview • Built by Nox Medical • Started a new era in home sleep testing • Embraced by thousands of users world wide • Revolutionary technology • Delivers improved clinical efficiency • Comfortable for all patient groups Pediatric thru Adult
  14. 14. Questions
  15. 15. Thank you

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