1. Unit 4.2 Review PBS

2. 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.

3. Why is it important to monitor the rate at which the heart beats
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.

4. 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.

5. 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 Anything higher is either prehypertension or hypertension.
Diastolic BP is when the heart is at rest and should be below 80.
Ventricular Hypertrophy

6. 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

7. 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.