SA Node - ANS 60-100 bpm; first line pacemaker
The SA node firing is represented by the P wave and shows atrial depolarization
AV Node - ANS 40-60 bpm
Ventricular Rate - ANS Purkinje Fibers
20-40bpm
PRI - ANS PR interval
Travel time of the impulse from the SA node thro...
SA Node - ANS 60-100 bpm; first line pacemaker
The SA node firing is represented by the P wave and shows atrial depolarization
AV Node - ANS 40-60 bpm
Ventricular Rate - ANS Purkinje Fibers
20-40bpm
PRI - ANS PR interval
Travel time of the impulse from the SA node through the AV node and to the ventricles
Normal PRI range - ANS 0.12-0.20s
QRS - ANS represents ventricular depolarization
Less than or equal to 0.12s
QT - ANS Length of time it takes for the ventricles to depolarize & repolarize
Normal QT interval range - ANS 0.32-0.40 seconds
Reading EKG graph paper - ANS 1 large box= 0.20 s
1 small box= 0.04s
6 Steps to interpreting Rhythm Strips - ANS 1. Determine if it is regular or irregular
2. Calculate atrial & ventricular rates
3. Evaluate the p & QRS waves
4. Measure the PRI
5. Measure the QRS
6. Interpret the rhythm
How to determine if the atria/ventricle is regular or irregular - ANS March out p waves
March out R wave
*Note an "extra beats
Calculating the atrial & ventricular rates - ANS Measure the HR
, 6 second method; count Ps and QRSs
How to evaluate the p wave - ANS Are the p waves upright & regular?
IS there one for every QRS complex?
How to measure the PRI - ANS Measure from the beginning of the P wave to the beginning of
the QRS
How to measure the QRS - ANS Measure from the beginning of the Q wave to the end of the
S wave
How does Ventricular Tachycardia present on an EKG? - ANS Regularity: regular
Rate: >100 bpm
P waves: none
PRI: none
QRS: wide and bizarre (>0.12s)
How to treat VTach with a pulse - ANS Check patient, obtain VS and notify MD/LIP
Synchronized Cardioversion
Medications: Amiodarone, adenosine, and verapamil
How to treat pulseless VTach - ANS SCREAM
Shock
CPR
Rhythm check
Epinephrine
Antiarrhythmic (amiodarone)
Magnesium Sulfate
OTHER:
Meds: amiodarone, lidocaine, and epinephrine
Defibrillation
Nursing care for Pulseless Electrical Activity (rhythm with no pulse) - ANS This is caused by
H&T
Call for help
Start CPR/ACLS
Epinephrine
Treat underlying cause
How does Asystole present on an EKG? - ANS Ventricular Rhythm
Regularity: n/a
Rate: n/a
P: none
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