Heart Rate Variability Guide

Randy ClareRespiratory Diagnostics

2016

Normal HRV

Normal Poincaré Plot

Has variability to react to the physiologic changes that the body is going through during sleep

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)

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

Tachycardia

◦ All of the points shift to the lower left

◦ Display’s DECREASED time between R-R intervals

-“Dot” Pattern represents pacemaker-NO variability from the patient-Heart rate totally controlled by pacer

Pacemaker

On Demand Pacemaker

◦ Controlled Rhythm

◦ Not much variance

OSA – Brady/Tachy

• Typical Pattern for OSA patient◦ HR DECREASES during Apneic Event◦ HR INCREASES after Apneic Event

Decreased HR

Increased HR

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

OSA Patient Pre-Treatment

OSA Patient Post Treatment

© 2015 CareFusion Corporation or one of its subsidiaries. All rights reserved.

Nox T3 by CareFusion, For Sleep Disordered Breathing (SDB)

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

Questions

Thank you