Download Unit 4.2 Review PBS - Huber Heights City Schools

Unit 4.2 Review PBS
In what ways can technology be used to
collect and analyze cardiovascular data
• Heart rate monitors and
EKG can pick up the
electrical signals sent
through the heart by
measuring impulses in
the skin.
• Sphygmomanometer
(Blood pressure cuffs)
can be linked to a
computer to measure
blood pressure.
Why is it important to monitor the rate at which
the heart beats? What factors can influence
heart rate
• In emergencies heart rate
can tell us if the heart is
working properly and
pumping enough blood
• Needs to be monitored if on
certain medications or if you
have a disease that lowers
heart rate
• Check your overall
fitness/stress levels
• Can be used to find the
cause of symptoms such as
lethargy and chest pain.
What is blood pressure? How do systolic and
diastolic blood pressure values relate to the
movement of blood in arteries?
• Blood pressure is the amount
of force placed on the
arteries
• It is taken using a
Sphygmomanometer
• Systolic Blood pressure is the
amount of pressure when a
pulse is first heard when
pressure is released.
• Diastolic pressure is the
amount of pressure when the
pulse is no longer heard
again.
How do systolic and diastolic blood pressure values
relate to the movement of blood in arteries?
What factors can influence blood pressure?
• Systolic BP is when
the heart is beating
and should be below
120. Anything higher
is either
prehypertension or
hypertension.
• Diastolic BP is when
the heart is at rest
and should be below
80.
Ventricular
Hypertrophy
What is an EKG?
• EKG (Electrocardiogram)
measures the electric
impulse through the
heart
• SA node “pacemaker”
signals atrium to contract
(forms P wave)
• AV node receives signal
from SA node
• Purkinje fibers signal
ventricles to contract
(forms QRS complex
• T-wave – ventricles relax
How can an EKG be used in the diagnosis
and treatment of heart disease?
• EKG’s can be used to
identify cause of
heart diseases for
example: Atrial
Fibrillation shows
multiple small P
waves, which means
the SA node is not
firing correctly.