Wednesday February 9, 2011
•Review and collect HW-follow up questions
•Review important points for the lab report
-rough draft due tomorrow!!
•Return quizzes and homework
•Heart Rate and Blood Pressure
•Updated powerpoint lectures have been posted
Understanding
Heart Rate & Blood Pressure
Knowing your numbers and what they mean
• What is blood pressure?
• What should your blood
pressure numbers be?
• What do you do if your blood
pressure numbers are too high?
• What does your heart do?
• What is heart rate?
• What should your heart rate
numbers be?
Your Heart
• It looks like an ice-cream
cone!
• Pointed bottom
• Rounded top
• Hollow
• Can fill up with blood
MORE ABOUT YOUR HEART
– In middle of chest
– Between your lungs
– Size of fist
– Tipped over
• More on left side
– Is a muscle
• Acts like a pump
http://www.americanheart.org/downloadable/heart/102441059502447%20What%20Is%20the%20Heart.pdf
Heart Parts:
• Arteries
• Capillaries
• Veins
Your heart sends blood to the whole body
•
Oxygen
•
Nutrients
•
Carries away waste
HEART RATE
-the number of heartbeats per unit of time- beats per minute
(bpm)
-can vary as the body's need to absorb O2 and excrete CO2
changes, such as during exercise or sleep
HEART RATE
-assists in the diagnosis & tracking of medical conditions
-monitor heart rate in athletes to gain maximum efficiency
from their training
-measured by finding the pulse at any point on thebody where an
artery’s pulsation is transmitted to
the surface
-No thumb!!
Use your middle and index
For Example….
Neck
The inside of the elbow
Behind the knee
Over the abdomen
The chest (apex of the heart)
The temple
Wrist
Resting heart rate
-heart rate when they awake; lying down and
not immediately post-exertion
-Typical healthy Hrrest in adults is 60–80 bpm
bradycardia-rates below 60 bpm
tachycardia-rates above 100 bpm
-conditioned athletes often have resting heart
rates below 60 bpm.
Q: What’s the deal with athletes?
Lance Armstrong: Hrrest = 32 bpm
Blood Pressure Measurement
• Force of blood pushing against the walls of the arteries
•
•
•
•
Force
Amount of blood
Size
Flexibility of the arteries
http://www.nlm.nih.gov/medlineplus/ency/article/003398.htm
3 Ways to Measure Blood
Pressure
Aneroid Monitor
Digital Monitor
Finger/Wrist
Monitor
http://familydoctor.org/online/famdocen/home/common/heartdisease/treatment/128.html
Before Taking Your Blood Pressure…
• Don’t use 30 minutes prior to
taking your blood pressure:
– Caffeine,
– Alcohol, or
– Tobacco.
• Go to the bathroom.
• Rest 3-5 minutes before taking
your blood pressure.
• Sit comfortably.
– Legs and ankles uncrossed
– Back supported
What Does Your Blood Pressure Reading
Mean?
Normal
• Less than 120
• Less than 80
Pre-hypertension
• 120-139
• 80-89
High Blood Pressure – Stage 1
• 140-159
• 90 – 99
High Blood Pressure – Stage 2
• 160 or higher
• 100 or higher
http://familydoctor.org/online/famdocen/home/common/heartdisease/treatment/128.html
http://www.nhlbi.nih.gov/health/dci/Diseases/Hbp/HBP_WhatIs.html
What Is Your Blood Pressure?
Lab 1: Measuring Heart Rate
Friday February 11, 2011
Look online for posted assignments
Lab 2: Measuring Blood Pressure
Monday February 14, 2011
Look online for posted assignments