4801 Exam 2 All Exam Revision Questions and Answers
2024 Updated.
Nursing for dysrhythmias - ANSWER ASSESS PATIENT FIRST then dysrhythmia
EKG - 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 - ANSWER White above green
Brown to the pt. right of sternum
Black above red
heart rate - 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 - ANSWER SA node, AV node, Bundle of
His, Purkinje fibers
Parasympathetic - ANSWER rest and digest
,-VAGUS NERVE controls
-decrease rate of SA note
-decrease AV conduction
-atropine blocks this
sympathetic - ANSWER fight or flight
-increase rate of SA node
-increase AV node conduction
-increase cardiac contractility
-beta blockers block this
parts of EKG - 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 - ANSWER period where heart cant respond to stimuli after
previous impulse
, relative refractory period - 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 - ANSWER count R peaks for 6 seconds than multiply by 10
-most accurate=stethoscope on heart for 1 min
heart rate assessment - 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 - ANSWER 1. normal sinus: 60-100
2. sinus bradycardia: <60
3. sinus tachycardia: 101-180
-originates in sinus node
2024 Updated.
Nursing for dysrhythmias - ANSWER ASSESS PATIENT FIRST then dysrhythmia
EKG - 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 - ANSWER White above green
Brown to the pt. right of sternum
Black above red
heart rate - 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 - ANSWER SA node, AV node, Bundle of
His, Purkinje fibers
Parasympathetic - ANSWER rest and digest
,-VAGUS NERVE controls
-decrease rate of SA note
-decrease AV conduction
-atropine blocks this
sympathetic - ANSWER fight or flight
-increase rate of SA node
-increase AV node conduction
-increase cardiac contractility
-beta blockers block this
parts of EKG - 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 - ANSWER period where heart cant respond to stimuli after
previous impulse
, relative refractory period - 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 - ANSWER count R peaks for 6 seconds than multiply by 10
-most accurate=stethoscope on heart for 1 min
heart rate assessment - 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 - ANSWER 1. normal sinus: 60-100
2. sinus bradycardia: <60
3. sinus tachycardia: 101-180
-originates in sinus node
