EKG EXAM 1 WITH CORRECT
ANSWERS 2025
Which heart rhythm is characterized by the following:
P waves and QRS are firing on their own (they are
disassociated) Slow ventricular rate. ( correct
answers ) 3rd degree heart block
Normal PR interval? ( correct answers ) 0.12-
0.20 Normal QRS? ( correct answers ) 0.04-
0.12
This heart rhythm changes with inspiration
( correct answers ) Sinus arrhythmia
Rhythm characterized by a sawtooth pattern on EKG ( correct
answers ) Atrial flutter
Any rate that is > 150 = ( correct answers ) Supraventricular
tachycardia (SVT)
When does PVC become pathologic? ( correct answers ) When there
are more than 6/minute
Which heart rhythm is characterized by the following:
Normal sinus rhythm that pauses for a little and then resumes back to
normal sinus rhythm ( correct answers ) Sinus pause
How many PVC's in a row make ventricular tachycardia? ( correct
answers ) 3 in a row = V tach
What is the difference between ventricular tachycardia and
supraventricular tachycardia? ( correct answers ) The
difference is in how wide the QRS is
In SVT, the QRS complex is shorter
(< 0.4) In VT, it is a little wider
QRS greater than 0.12 is
characteristic of:
( correct answers )
Bundle branch block
, What is the difference between Torsades and ventricular ( correc
fibrillation? answers ) Torsades is more marked than t
ventriuclar fibrillation
1st degree AV block is characterized by: ( correct answers ) PR
interval greater than 0.2
Ion responsible for SA and AV node depolarization ( correct answers )
Calcium Ion that initiates myocyte depolarization ( correct answers )
Sodium
An early beat with no P wave is: ( correct answers ) Premature
junctional beat What is the rate for sinus tachycardia? ( correct
answers ) 100-150
What is the difference between atrial fibrillation and atrial flutter? (
correct answers
) In A fib - no distinct P waves, QRS = irregularly spaced
The capacity of a single cell to generate action potential sponatneously
( correct answers ) Automaticity
Right bundle branch block looks like: ( correct
answers ) Bunny ears Left bundle branch block looks like:
( correct answers ) Swoop
What does the QT interval stand for? ( correct answers ) Ventricular
depolarization and repolarization
What is the rate for the AV node? ( correct answers ) 40-60
A widened QRS beat is indicative of: ( correct answers ) PVC/PVB
Whichdepolarization,
After coronary artery supplies
they becomethe________________
AV node? ( correct answers )
( correct
Right coronary artery
charged Negatively charged answers )
Positively charged
What is the commonly used lead that we interpret everything from?
( correct answers ) Lead 2
Interior of all cells are _________________ charged
ANSWERS 2025
Which heart rhythm is characterized by the following:
P waves and QRS are firing on their own (they are
disassociated) Slow ventricular rate. ( correct
answers ) 3rd degree heart block
Normal PR interval? ( correct answers ) 0.12-
0.20 Normal QRS? ( correct answers ) 0.04-
0.12
This heart rhythm changes with inspiration
( correct answers ) Sinus arrhythmia
Rhythm characterized by a sawtooth pattern on EKG ( correct
answers ) Atrial flutter
Any rate that is > 150 = ( correct answers ) Supraventricular
tachycardia (SVT)
When does PVC become pathologic? ( correct answers ) When there
are more than 6/minute
Which heart rhythm is characterized by the following:
Normal sinus rhythm that pauses for a little and then resumes back to
normal sinus rhythm ( correct answers ) Sinus pause
How many PVC's in a row make ventricular tachycardia? ( correct
answers ) 3 in a row = V tach
What is the difference between ventricular tachycardia and
supraventricular tachycardia? ( correct answers ) The
difference is in how wide the QRS is
In SVT, the QRS complex is shorter
(< 0.4) In VT, it is a little wider
QRS greater than 0.12 is
characteristic of:
( correct answers )
Bundle branch block
, What is the difference between Torsades and ventricular ( correc
fibrillation? answers ) Torsades is more marked than t
ventriuclar fibrillation
1st degree AV block is characterized by: ( correct answers ) PR
interval greater than 0.2
Ion responsible for SA and AV node depolarization ( correct answers )
Calcium Ion that initiates myocyte depolarization ( correct answers )
Sodium
An early beat with no P wave is: ( correct answers ) Premature
junctional beat What is the rate for sinus tachycardia? ( correct
answers ) 100-150
What is the difference between atrial fibrillation and atrial flutter? (
correct answers
) In A fib - no distinct P waves, QRS = irregularly spaced
The capacity of a single cell to generate action potential sponatneously
( correct answers ) Automaticity
Right bundle branch block looks like: ( correct
answers ) Bunny ears Left bundle branch block looks like:
( correct answers ) Swoop
What does the QT interval stand for? ( correct answers ) Ventricular
depolarization and repolarization
What is the rate for the AV node? ( correct answers ) 40-60
A widened QRS beat is indicative of: ( correct answers ) PVC/PVB
Whichdepolarization,
After coronary artery supplies
they becomethe________________
AV node? ( correct answers )
( correct
Right coronary artery
charged Negatively charged answers )
Positively charged
What is the commonly used lead that we interpret everything from?
( correct answers ) Lead 2
Interior of all cells are _________________ charged
