4801 EXAM 2 LATEST REVISION 2024
GRADED A+ **
nursing for dysrhythmias (correct answer) ASSESS PATIENT FIRST
then dysrhythmia
EKG (correct answer) represents how impulse moves across myocardial
cells
-each lead is different angle
-12 lead=brief, diagnostic
-5 lead=telementary, for monitoring
EKG lead placement (correct answer) White above green
Brown to the pt. right of sternum
Black above red
heart rate (correct answer) -SA node=normal pacemaker, 60-100 bpm
-AV node=backup pacemaker, 40-60 bpm
-bundle of his/perkinge=last resort pacemaker, 20-40 bpm
Pathway of the Electrical Impulse in the Heart (correct answer) SA
node, AV node, Bundle of His, Purkinje fibers
Parasympathetic (correct answer) rest and digest
-VAGUS NERVE controls
-decrease rate of SA note
-decrease AV conduction
-atropine blocks this
sympathetic (correct answer) fight or flight
-increase rate of SA node
, -increase AV node conduction
-increase cardiac contractility
-beta blockers block this
parts of EKG (correct answer) -P-R interval=atrial depolarization and
AV conduction (0.12-0.2)***
-QRS=ventricular depolarization (<0.03)***
-S-T interval=depol to repol
-T wave=ventricular repolarization
-Q-T interval=ventricular depolarization to repol (0.34-0.43)***
-R-R=time between two ventricular repol
absolute refractory period (correct answer) period where heart cant
respond to stimuli after previous impulse
relative refractory period (correct answer) the period of time following
an action potential, when it is possible, but difficult, for the neuron to
fire a second action potential, due to the fact that the membrane is
further from threshold potential (hyperpolarized)
-too responsive
calculating HR (correct answer) count R peaks for 6 seconds than
multiply by 10
-most accurate=stethoscope on heart for 1 min
heart rate assessment (correct answer) 1. p wave (upright)
2. atrial rhythm and rate
3. P-R interval (long in heart block)
4. ventirucular rate and rhythm
5. QRS complex (wide in d-tac)
6. ST stegment (elevated in MI, depressed in ischemia)
7. QR interval
8. T wave
3 sinus rhythm (correct answer) 1. normal sinus: 60-100
GRADED A+ **
nursing for dysrhythmias (correct answer) ASSESS PATIENT FIRST
then dysrhythmia
EKG (correct answer) represents how impulse moves across myocardial
cells
-each lead is different angle
-12 lead=brief, diagnostic
-5 lead=telementary, for monitoring
EKG lead placement (correct answer) White above green
Brown to the pt. right of sternum
Black above red
heart rate (correct answer) -SA node=normal pacemaker, 60-100 bpm
-AV node=backup pacemaker, 40-60 bpm
-bundle of his/perkinge=last resort pacemaker, 20-40 bpm
Pathway of the Electrical Impulse in the Heart (correct answer) SA
node, AV node, Bundle of His, Purkinje fibers
Parasympathetic (correct answer) rest and digest
-VAGUS NERVE controls
-decrease rate of SA note
-decrease AV conduction
-atropine blocks this
sympathetic (correct answer) fight or flight
-increase rate of SA node
, -increase AV node conduction
-increase cardiac contractility
-beta blockers block this
parts of EKG (correct answer) -P-R interval=atrial depolarization and
AV conduction (0.12-0.2)***
-QRS=ventricular depolarization (<0.03)***
-S-T interval=depol to repol
-T wave=ventricular repolarization
-Q-T interval=ventricular depolarization to repol (0.34-0.43)***
-R-R=time between two ventricular repol
absolute refractory period (correct answer) period where heart cant
respond to stimuli after previous impulse
relative refractory period (correct answer) the period of time following
an action potential, when it is possible, but difficult, for the neuron to
fire a second action potential, due to the fact that the membrane is
further from threshold potential (hyperpolarized)
-too responsive
calculating HR (correct answer) count R peaks for 6 seconds than
multiply by 10
-most accurate=stethoscope on heart for 1 min
heart rate assessment (correct answer) 1. p wave (upright)
2. atrial rhythm and rate
3. P-R interval (long in heart block)
4. ventirucular rate and rhythm
5. QRS complex (wide in d-tac)
6. ST stegment (elevated in MI, depressed in ischemia)
7. QR interval
8. T wave
3 sinus rhythm (correct answer) 1. normal sinus: 60-100
