heart rate monitoring
DESCRIPTION
Heart Rate Monitoring. INSY 3021 Auburn University Spring 2007. Functioning. Blood Pressure. Pressure = Blood Flow (Q) x Resistance (P) Controlling Factors (For Arterial Pressure) Pumping Action of Heart Blood Volume Elasticity of Arterial Walls Blood Viscosity Peripheral Resistance. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/1.jpg)
Heart Rate Monitoring
INSY 3021
Auburn UniversitySpring 2007
![Page 2: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/2.jpg)
![Page 3: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/3.jpg)
Functioning
![Page 4: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/4.jpg)
![Page 5: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/5.jpg)
Blood Pressure
Pressure = Blood Flow (Q) x Resistance (P)
Controlling Factors (For Arterial Pressure) Pumping Action of Heart Blood Volume Elasticity of Arterial Walls Blood Viscosity Peripheral Resistance
![Page 6: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/6.jpg)
![Page 7: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/7.jpg)
Cardiac Output
Q = HR x SV(L*/min) (beats/min) (L*/beat)*- ml. also commonly used
![Page 8: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/8.jpg)
Stroke Volume (SV)
SV = Quantity of blood pumped with each beat of the heart (ml/beat)
Factors affecting SV Venous return to heart Distensibility of ventricles Force of contraction of the ventricles in
relation to the pressure in the artery (Aorta or Pulmonary artery)
Sympathetic and hormonal stimulation
![Page 9: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/9.jpg)
Heart Rate (HR)
HR = Heart Beats/min Most commonly studied circulatory
parameter Factors affecting HR
Sympathetic and parasympathetic stimulation of sino-artial (SA) node of the heart
Hormonal stimulation Temperature Age
![Page 10: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/10.jpg)
![Page 11: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/11.jpg)
![Page 12: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/12.jpg)
Task Design and Analysis
What is the maximum load that must be supported?
Design within the acceptable limits of safety!
![Page 13: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/13.jpg)
![Page 14: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/14.jpg)
Estimator- HR Tests
Concept: Estimate MAC from simple tests How accomplished
Have person perform 1 or 2 standard workloads (usually step tests)
Measure HR response Compare results to known values for the
workloads Comments
Simple to perform- little stress Not exact- Good for screening Not as much equipment is required
![Page 15: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/15.jpg)
![Page 16: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/16.jpg)
Assessment of Task Strain
Percent Work Capacity Heart Rate (HR) Analysis
![Page 17: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/17.jpg)
![Page 18: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/18.jpg)
HR Analysis
Maximum HR (ACSM) = 220 – Age
Heart Strain = (Task HR / 220–Age) x 100% (Note: Should be < 65%)
Heart Strain = (Task HR – Resting
HR) / (220–Age–Resting HR) x 100% (Note: Should be < 50%)
![Page 19: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/19.jpg)
Ability to Work Long Durations
Workers will “self pace” at 33 to 44% of VO2 Max for 8 hour shifts
Common task and design criteria is 33% of VO2 Max with HR of 105-115 Beats/min
Work-Rest Cycles
![Page 20: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/20.jpg)
Work–Rest Cycles
Heart rate for a lifting task with 2 minute rest periods.
Must be able to determine if this type of job is acceptable and for whom.
![Page 21: Heart Rate Monitoring](https://reader034.vdocuments.net/reader034/viewer/2022050723/568145bd550346895db2c74f/html5/thumbnails/21.jpg)
Questions & Comments