4.2 PBS Essential Quesitons
Terms in this set (20)
In what ways can technology be used to collect and analyze cardiovascular data?
Sphygmonometer- determines systolic and diastolic arterial pressure, helps to measure blood pressure by applying the correct amount of pressure to the arm in order to read the correct blood pressure
stethoscope- used to listen to the heart and determine how fast it is beating
EKG- electrodes on skin pick up current and show graphically, it helps to determine if the electrical current in the heart is working properly
Why is it important to monitor the rate at which the heart beats?
It is important in order to insure that the patient's heart is working properly. It makes sure that enough blood is getting through the body to keep it functioning correctly. Checking heart rate also helps a doctor to know if there is a irregular heartbeat. It shows if it is beating to fast (being overworked) or beating to slow (heart is shutting down and body is not getting enough oxygen)
What factors can influence heart rate?
anxiety, fight or flight, being very emotional, exercising, body position, temperature
What is blood pressure?
The amount of force exerted against the artery walls as blood flows through the vessels in your body, the veins and arteries
How do systolic and diastolic blood pressure values relate to the movement of blood in arteries?
systolic pressure- the pressure in the arteries when the ventricles are at maximum contraction
diastolic pressure- the pressure in the arteries when the ventricles are relaxing
What factors can influence blood pressure?
activity, diet, temperature, emotional state, body position, medication use, and overall health
What is an EKG?
a graphical recording of the electrical events occuring within the heart
How can an EKG be used in the diagnosis and treatment of heart disease?
They are taken when heart problems are suspected and can be used in cardiology to diagnose heart attacks, lack of blood flow to the heart, arrhythmia (no rhythm), lack of forcefulness of heart muscle, muscle parts that are too thick or heart parts that are too big, birth defects of the heart, heart valve diseases
What does it mean if the QRS is longer than normal?
What does it mean if the T wave in flatter than normal?
What does it mean if the T wave is higher than normal?
contraction of the atrium, the starting signal
Rapid depolarization of the ventricles, ventricular activation
flat line (wave)
ventricular repolarization, recovery of the ventricular muscle tissue
Path of the electrical signal
SA node in the right atrium
AV node in the right atrium (slowly)
atrioventricular bundle (rapidly)
bundle branches around each ventricle
What is the heart beat caused by?
the contraction of muscle cells and results in the movement of blood from the heart to the arteries and the rest of the body
What is the heart rate in units?
number of heart contractions per unit of time usually per minute