Unit 12
What is the normal heart rate range of sinus rhythms?
60-100 BPM
TRUE or FALSE: AV node conduction never happens in a first-degree AV block
FALSE; AV node is delayed but it DOES happen
what is the most important piece of equipment in performing a stress test?
12 lead EKG machine
what step do you take to prep for placing o the leads for holter monitor?
shave chest if necessary, abrading, taping
The rate is 40 with a PR interval of 0.14 and a QRS less than 0.12.
sinus bradycardia
When does cardiac output decrease?
When the heart rate speeds up or speeds down
What block is it when the PRI progressively grows longer until there is no QRS?
Mobitz second-degree AV block (Wencebach)
what is the main purpose of a stress test?
Usually done to search for coronary artery disease in a patient having suspicious symptoms
how long are these worn?
24 hours
The rate is 120 with a PR interval of 0.16 and a QRS less than 0.12.
sinus tachycardia
What is a cause of Sinus Bradycardia, other than medications?
Hypoxia, Vagal Stimulation, or MI
What could be a medication to treat AV blocks?
Atropine, epinephrine
ever how long should the blood pressure be checked?
every 2.5 min
what are special instructions for this?
no bathing, continue with normal daily routine, document a small diary
The rate is 80 with a pause before and after the P wave and a QRS less than 0.12.
sinus exit block
What is an Antipyretic?
A medication that reduces fevers
What exactly is happening in an AV block?
SA node is firing, but there's partial/complete block of the impulses, causing a delay in impulses reaching ventricles
what is the indication of a a positive stress test?
ST segment depression is greater than or equal to 1.0-1.5 mm, does not return to baseline withing .08 sec after j point
name indicators you may need a holter monitor
syncope, chest pains, suspected dysrhythmias, determining if dysrhythmia treatment is working
The rate is 90 with a PR interval of 0.24 and a QRS less than 0.12.
first-degree AV block
During Sinus Arrest, the SA Node cannot form an impulse. During Sinus Block, the SA Node cannot send the impulse.
Define a third-degree AV block
A sinus impulse is happening, but never makes it through
list at least 3 absolute contraindications
Acute MI, Uncontrolled heart failure, unstable angina, uncontrolled arrhythmias that have decreased CO, symptomatic aortic stenosis, dissecting aneurysm, acute pulmonary embolism
how many leads do you attach and where on body
five or more on trunk of body
Has a heart rate of 57 with 2 QRS after the P wave and a PR interval greater than 0.20.
mobitz 2