Nurs358 (SDSU) Exam 2 Questions With
Guaranteed Pass Solutions.
EKG
Talk about the Cardiac Conduction System? - Answer SA node fires - atrial
contraction/depolarization - the impulse spreads across the atria - contraction
Down to the AV node - through the bundle of His - right and left bundle branches - Purkinje
fibers - to ventricles - ventricular contraction/depolarization
EKG
What does the nervous system control? - Answer Affects rate of impulse formation, speed of
conduction, and strength of contraction
EKG
What is the Parasympathetic Nervous System (Vagus) control and do? - Answer Rest and Relax
Decreased rate and speed of conudction
EKG
What is the Sympathetic Nervous System control and do? - Answer Fight or Flight
Increased rate, conduction, and contractility
EKG
What is Electrocardiographic monitoring? - Answer A graphic tracing of the electrical impulses
produced in the heart
EKG
Where do the 5 Leads go?
-White
-Green
-Black
-Red
,Ground lead, 4th intercostal space immediately right to sternum
EKG
ECG paper (seconds)
-Small square
-Large square - Answer 0.04 seconds
0.20 seconds
EKG
What are the 3 ways to calculate the heart rate? - Answer -Count R-R intervals in 6 seconds
and multiply by 10
-Count number of small squares between one R-R interval divided into 1500 (cannot be used for
irregular rhythms)
-Count number of large squares between one R-R interval divided into 300 (cannot be used for
irregular rhythms)
EKG
What is the P wave? - Answer Atrial depolarization
EKG
What is the PR interval?
-what is the normal measurement - Answer Atrial depolarization and conduction (start of P
wave to start of QRS complex)
0.12-0.20 s
EKG
What is the QRS complex?
-Q
-R
-S
-what is the normal measurement - Answer First negative deflection (ventricular
depolarization)
, 0.08-0.12 s
EKG
What is the ST segment? - Answer Time between ventricular depolarization and repolarization
EKG
What is the T wave? - Answer Ventricular repolarization
EKG
What is the QT interval?
-what is the normal measurement - Answer Time it takes for ventricular depolarization and
repolarization
0.34-0.43 s
EKG
Normal Sinus Rhythm
-Regularity
-Rate
-P waves
-PR interval time
-QRS interval time - Answer R-R intervals constant, regular rhythm
60-100 BPM
Uniform, one p for every QRS
Between 0.12-0.20 s
Less than 0.12 s
EKG
Sinus Bradycardia
-Regularity
-Rate
Guaranteed Pass Solutions.
EKG
Talk about the Cardiac Conduction System? - Answer SA node fires - atrial
contraction/depolarization - the impulse spreads across the atria - contraction
Down to the AV node - through the bundle of His - right and left bundle branches - Purkinje
fibers - to ventricles - ventricular contraction/depolarization
EKG
What does the nervous system control? - Answer Affects rate of impulse formation, speed of
conduction, and strength of contraction
EKG
What is the Parasympathetic Nervous System (Vagus) control and do? - Answer Rest and Relax
Decreased rate and speed of conudction
EKG
What is the Sympathetic Nervous System control and do? - Answer Fight or Flight
Increased rate, conduction, and contractility
EKG
What is Electrocardiographic monitoring? - Answer A graphic tracing of the electrical impulses
produced in the heart
EKG
Where do the 5 Leads go?
-White
-Green
-Black
-Red
,Ground lead, 4th intercostal space immediately right to sternum
EKG
ECG paper (seconds)
-Small square
-Large square - Answer 0.04 seconds
0.20 seconds
EKG
What are the 3 ways to calculate the heart rate? - Answer -Count R-R intervals in 6 seconds
and multiply by 10
-Count number of small squares between one R-R interval divided into 1500 (cannot be used for
irregular rhythms)
-Count number of large squares between one R-R interval divided into 300 (cannot be used for
irregular rhythms)
EKG
What is the P wave? - Answer Atrial depolarization
EKG
What is the PR interval?
-what is the normal measurement - Answer Atrial depolarization and conduction (start of P
wave to start of QRS complex)
0.12-0.20 s
EKG
What is the QRS complex?
-Q
-R
-S
-what is the normal measurement - Answer First negative deflection (ventricular
depolarization)
, 0.08-0.12 s
EKG
What is the ST segment? - Answer Time between ventricular depolarization and repolarization
EKG
What is the T wave? - Answer Ventricular repolarization
EKG
What is the QT interval?
-what is the normal measurement - Answer Time it takes for ventricular depolarization and
repolarization
0.34-0.43 s
EKG
Normal Sinus Rhythm
-Regularity
-Rate
-P waves
-PR interval time
-QRS interval time - Answer R-R intervals constant, regular rhythm
60-100 BPM
Uniform, one p for every QRS
Between 0.12-0.20 s
Less than 0.12 s
EKG
Sinus Bradycardia
-Regularity
-Rate
