DYSRHYTHMIA TEST QUESTIONS AND
ANSWERS
What is the flow of conduction in the heart? - Answer-SA Node --> AV Node --> Bundle
of His --> Purkinje fibers
Identify the parts of the conduction system - Answer-Left side: SA node, AV node, Right
bundle branch
Right side: Bundle of His, Left bundle branch, Left anterior division, Left posterior
division
In which AV block should we use Atropine with caution? - Answer-2nd degree TYPE 2
What is the special quality of the heart in relation to other muscles in the body? -
Answer-The heart generates its own electrical impulses
What is the normal HR when the SINUS node is in charge of heart conduction? -
Answer-60-100 bpm
What is the normal HR when the AV node is in charge of heart conduction? - Answer-
40-60 bpm
What is the normal HR when the Purkinje Fibers is in charge of heart conduction? -
Answer-20-40 bpm
What does the P-wave represent? - Answer-Atrial depolarization
What does the QRS complex represent? - Answer-Ventricular depolarization
What does the T wave represent? - Answer-Ventricular repolarization
Why is there no wave representing atrial repolarization? - Answer-Atrial repolarization is
covered by the ventricular depolarization wave
What is the danger of a prolonged QT interval? - Answer-Mailed to types of ventricular
tachycardia
One small box - Answer-0.04 seconds
One large box - Answer-0.20 seconds (5 tiny boxes)
Normal PR interval - Answer-0.12-0.20 seconds
Normal QRS complex - Answer-0.04-0.10 seconds
, Normal QT interval - Answer-Less than 0.46 seconds
J Point - Answer-Junction between end of QRS complex and start of T wave
To measure ST segment - Answer-Begin one small square past J point
5 Critical Rhythms - Answer-Ventricular Fibrillation
Ventricular Tachycardia
Asystole
3rd Degree AV block
ST elevation
General Interventions - Answer-Always assess the patient first
RRT and PCP or Code
12-lead EKG
Cardiac enzymes
Patent IV
Initial Interventions for ST elevation - Answer-M: morphine
O: oxygen
N: nitroglycerin
A: aspirin
- prepare for Cath lab
6 Basic Steps for Rhythm Interpretation - Answer-HR
Rhythm
P-wave
P-R interval
QRS width
Other findings
Effects of Dysrhythmias on CO - Answer-CO=HR X SV
Dysrhythmias decrease CO
Atrial Kick comprises 30% of CO
ST Segment - Answer-Elevation: myocardial infarction/injury
Depression: myocardial ischemia
Normal Sinus Rhythm - Answer-Regular
60-100 bpm
P-waves normal
PR: normal
QRS: normal
ANSWERS
What is the flow of conduction in the heart? - Answer-SA Node --> AV Node --> Bundle
of His --> Purkinje fibers
Identify the parts of the conduction system - Answer-Left side: SA node, AV node, Right
bundle branch
Right side: Bundle of His, Left bundle branch, Left anterior division, Left posterior
division
In which AV block should we use Atropine with caution? - Answer-2nd degree TYPE 2
What is the special quality of the heart in relation to other muscles in the body? -
Answer-The heart generates its own electrical impulses
What is the normal HR when the SINUS node is in charge of heart conduction? -
Answer-60-100 bpm
What is the normal HR when the AV node is in charge of heart conduction? - Answer-
40-60 bpm
What is the normal HR when the Purkinje Fibers is in charge of heart conduction? -
Answer-20-40 bpm
What does the P-wave represent? - Answer-Atrial depolarization
What does the QRS complex represent? - Answer-Ventricular depolarization
What does the T wave represent? - Answer-Ventricular repolarization
Why is there no wave representing atrial repolarization? - Answer-Atrial repolarization is
covered by the ventricular depolarization wave
What is the danger of a prolonged QT interval? - Answer-Mailed to types of ventricular
tachycardia
One small box - Answer-0.04 seconds
One large box - Answer-0.20 seconds (5 tiny boxes)
Normal PR interval - Answer-0.12-0.20 seconds
Normal QRS complex - Answer-0.04-0.10 seconds
, Normal QT interval - Answer-Less than 0.46 seconds
J Point - Answer-Junction between end of QRS complex and start of T wave
To measure ST segment - Answer-Begin one small square past J point
5 Critical Rhythms - Answer-Ventricular Fibrillation
Ventricular Tachycardia
Asystole
3rd Degree AV block
ST elevation
General Interventions - Answer-Always assess the patient first
RRT and PCP or Code
12-lead EKG
Cardiac enzymes
Patent IV
Initial Interventions for ST elevation - Answer-M: morphine
O: oxygen
N: nitroglycerin
A: aspirin
- prepare for Cath lab
6 Basic Steps for Rhythm Interpretation - Answer-HR
Rhythm
P-wave
P-R interval
QRS width
Other findings
Effects of Dysrhythmias on CO - Answer-CO=HR X SV
Dysrhythmias decrease CO
Atrial Kick comprises 30% of CO
ST Segment - Answer-Elevation: myocardial infarction/injury
Depression: myocardial ischemia
Normal Sinus Rhythm - Answer-Regular
60-100 bpm
P-waves normal
PR: normal
QRS: normal
