Quiz 3: Electrocardiography (ECG)
Study online at https://quizlet.com/_6fj9qc
1. What is an electro- a graphic representation of the electrical impulses of the heart
cardiogram (ECG)?
2. What are ECGs used used to identify irregularities in heart rhythm
for?
3. How are ECGs recorded from the body surface by electrodes
recorded?
4. Name the steps for SA node > AV node (junctional) node > Bundle of His > Left and Right bundle
the heart conduc- branches > Purkinje fibers
tion system
5. ECG Anatomy
6. P-wave normally rounded, symmetric and upright
represents atrial depolarization, followed closely by atrial contraction
7. P-R interval represents the slowing of conduction through the AV node
8. QRS complex represents ventricular depolarization and normally followed closely by ventric-
ular contraction
9. Repolarization begins when ventricular contraction ends and is complete by the end of the
T-wave
10. ST segment an isoelectric (straight-line) pause in which the ventricle is initiating repolar-
ization
, Quiz 3: Electrocardiography (ECG)
Study online at https://quizlet.com/_6fj9qc
11. Why do PTs need to basic understanding about a single-lead EKG can help a practitioner deter-
care about ECGs? mine safety of pursuing interventions in the light of abnormalities
Can be a good indication of when to stop a treatment or when to withhold it
all together
12. Single-lead ECGs Single-lead monitoring via telemetry is the most common practice in
step-downs, ICUs, and CPPT rehab programs
Used to detect rate and rhythm disturbances, however cannot detect ischemia
13. Twelve-lead ECGs Twelve -lead EKG is used to determine ischemia or infarction
A twelve-lead EKG is ordered with change in patient condition or when is-
chemia is suspected
14. ventricular hyper- indicated by increased height (R wave) and depth (S wave) in QRS complex
trophy
15. myocardial ischemia indicated by ST segment depression or T-wave inversion when present with
angina
16. Tall, tented T waves Hyperkalemia
indicates what?
Effects the conduction system of heart. Can lead to ventricular arrhythmia
17.
, Quiz 3: Electrocardiography (ECG)
Study online at https://quizlet.com/_6fj9qc
myocardial infarc- ST segment elevation
tion
If ST elevation is seen on EKG in conjunction with acute onset chest pain, this
is a medical emergency
18. An inverted Q wave Sign of a previous MI
indicates what?
19. ST Segment Eleva- Myocardial Infarction!! MEDICAL EMERGENCY
tion + Chest pain = ?
20. Graph paper 1 small box = 1mm = 0.04 seconds
1 big box = 5mm = 0.20 seconds
Counting boxes can be a way to quickly determine heart rate from an ECG print
out
21. Cardiac rate = 80
bpm (picture)
22.
Study online at https://quizlet.com/_6fj9qc
1. What is an electro- a graphic representation of the electrical impulses of the heart
cardiogram (ECG)?
2. What are ECGs used used to identify irregularities in heart rhythm
for?
3. How are ECGs recorded from the body surface by electrodes
recorded?
4. Name the steps for SA node > AV node (junctional) node > Bundle of His > Left and Right bundle
the heart conduc- branches > Purkinje fibers
tion system
5. ECG Anatomy
6. P-wave normally rounded, symmetric and upright
represents atrial depolarization, followed closely by atrial contraction
7. P-R interval represents the slowing of conduction through the AV node
8. QRS complex represents ventricular depolarization and normally followed closely by ventric-
ular contraction
9. Repolarization begins when ventricular contraction ends and is complete by the end of the
T-wave
10. ST segment an isoelectric (straight-line) pause in which the ventricle is initiating repolar-
ization
, Quiz 3: Electrocardiography (ECG)
Study online at https://quizlet.com/_6fj9qc
11. Why do PTs need to basic understanding about a single-lead EKG can help a practitioner deter-
care about ECGs? mine safety of pursuing interventions in the light of abnormalities
Can be a good indication of when to stop a treatment or when to withhold it
all together
12. Single-lead ECGs Single-lead monitoring via telemetry is the most common practice in
step-downs, ICUs, and CPPT rehab programs
Used to detect rate and rhythm disturbances, however cannot detect ischemia
13. Twelve-lead ECGs Twelve -lead EKG is used to determine ischemia or infarction
A twelve-lead EKG is ordered with change in patient condition or when is-
chemia is suspected
14. ventricular hyper- indicated by increased height (R wave) and depth (S wave) in QRS complex
trophy
15. myocardial ischemia indicated by ST segment depression or T-wave inversion when present with
angina
16. Tall, tented T waves Hyperkalemia
indicates what?
Effects the conduction system of heart. Can lead to ventricular arrhythmia
17.
, Quiz 3: Electrocardiography (ECG)
Study online at https://quizlet.com/_6fj9qc
myocardial infarc- ST segment elevation
tion
If ST elevation is seen on EKG in conjunction with acute onset chest pain, this
is a medical emergency
18. An inverted Q wave Sign of a previous MI
indicates what?
19. ST Segment Eleva- Myocardial Infarction!! MEDICAL EMERGENCY
tion + Chest pain = ?
20. Graph paper 1 small box = 1mm = 0.04 seconds
1 big box = 5mm = 0.20 seconds
Counting boxes can be a way to quickly determine heart rate from an ECG print
out
21. Cardiac rate = 80
bpm (picture)
22.
