Telemetry (EXAM 1) QUESTIONS AND ANSWERS

Telemetry (EXAM 1) QUESTIONS AND
ANSWERS


What do the SA & AV nodes contract?

SA-->AV=atrial contraction
AV-->bundle of HIS-->purkinje fibers=ventricular contraction

Normal intervals

memorize these
PR: .12-.2
QRS: .04-.12
QT: .34-.43

BPM when different nodes are in control

SA: 60-100
AV: 40-60
HIS-Purkinje: 20-40

How many seconds are the squares worth on ECG paper?

small square: .04
large square: .20
5 large squares: 1.0
1 strip: 6.0

Questions to ask when reading ECG

1. is there a P for every QRS?
2. does it walk out?

, 3. what are the intervals?
4. what is the rate/rhythm?

How do you treat dysrhythmias?

based upon symptoms
no symptoms=no treatment

Sinus Bradycardia

<60bpm
-walks out
-SA node in control
-causes: hypoxia, hypothermia, sleep, athletes, meds
-symptoms: syncope, chest pain, hypotension, SOB, diaphoresis
-treatment: atropine, underlying cause




Sinus Tachycardia

>100bpm
-walks out
-SA node in control
-causes: fever, anemia, hypotension, pulmonary embolism, MI
-symptoms: dizzy, syncope, SOB, diaphoresis, anxiety, palps
-treatment: underlying cause, vagal maneuvers, meds




Atrial fibrillation (AFIB)