ECG FINAL EXAM |ACCURATE ANSWERS |VERIFIED
What is the normal PR measurement? - Accurate Answer0.12 to 0.20 seconds.
What is the normal QRS measurement? - Accurate Answer0.06 to 0.10 seconds.
What does the PR interval represent? - Accurate AnswerThe time between the onset of atrial depola...
ECG FINAL EXAM 2024\2025 |
ACCURATE ANSWERS |VERIFIED
What is the normal PR measurement? - Accurate Answer✅✅0.12 to 0.20 seconds.
What is the normal QRS measurement? - Accurate Answer✅✅0.06 to 0.10 seconds.
What does the PR interval represent? - Accurate Answer✅✅The time between the onset of atrial
depolarization and the onset of ventricular depolarization.
What is going on during the QRS interval? - Accurate Answer✅✅Depolarization of the
ventricles.
Which dysrhythmia occurs when the SA node stops firing causing a pause in electrical activity? -
Accurate Answer✅✅Sinus Arrest
A standard 12-lead focuses directly on which portion of the heart? - Accurate Answer✅✅Left
Ventricle
Which leads view the inferior wall of the left ventricle? - Accurate Answer✅✅II, III, aVF
Which leads view the septal wall? - Accurate Answer✅✅V1 & V2
Which leads view the anterior wall of the left ventricle? - Accurate Answer✅✅V3 & V4
Which leads view the lateral wall of the left ventricle? - Accurate Answer✅✅I, aVL, V5, & V6
Leads II, III, and aVF view which coronary artery and which branch? - Accurate
Answer✅✅Right coronary-marginal branch
, Leads V3 & V4 view which coronary artery and which branch? - Accurate Answer✅✅Left
coronary-left anterior descending branch
Leads 1, aVL, V5, & V6 view which coronary artery and which branch? - Accurate
Answer✅✅Left coronary-left circumflex branch
Two or more leads looking at the same part of the heart, or numerically consecutive leads are
known as what? - Accurate Answer✅✅Anatomically contiguous leads
A reduction or interruption in blood flow and oxygen to the myocardium for a short period of
time is called what? - Accurate Answer✅✅Myocardial ischemia
Which of the following can cause extreme right axis deviation? - Accurate Answer✅✅AOTA-
dextrocardia, COPD, hyperkalemia
Right axis deviation is considered normal in which type of people? - Accurate
Answer✅✅Children and tall, thin adults
If lead I is up and aVF is down, what is the axis? - Accurate Answer✅✅Left
If lead I is down and aVF is also down, what is the axis? - Accurate Answer✅✅Extreme right
Which leads are used to determine the presence of axis deviation? - Accurate Answer✅✅Leads
I and aVF
An abnormal thickening of the ventricular wall due to chronic pressure overload is often caused
by hypertension is known as what? - Accurate Answer✅✅Left ventricular hypertrophy
Electrical axis deviation refers to the changes that occur on the 12-lead ECG as the result of
what? - Accurate Answer✅✅Position of the heart within the patient's chest
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