Question 1

An axis of -120 degrees is

Accepted Answer

A) Normal axis. 
B) Left axis deviation. 
C) Right axis deviation. 
D) Indeterminate axis.

Question 2

The normal axis is between 0 and -90 degrees.

Accepted Answer

A) True 
 B)False

Question 3

Bundle branch block is characterized by

Accepted Answer

A) A QRS complex at least 0.12 seconds wide. 
B) More P waves than QRS complexes. 
C) Cardiac arrest. 
D) Sudden onset of symptoms of decreased cardiac output.

Question 4

Right ventricular hypertrophy is most commonly caused by

Accepted Answer

A) Atrial fibrillation. 
B) Heart attack. 
C) Hypertension. 
D) Chronic lung disease.

Question 5

If the QRS in I and AVF are both negative,the axis is

Accepted Answer

A) Normal. 
B) Right axis deviation. 
C) Left axis deviation. 
D) Indeterminate axis.

Question 6

If the heart's current originates in the left ventricle and travels upward to the right,there would be right axis deviation.

Accepted Answer

A) True 
 B)False

Question 7

If the QRS in lead I is positive and the QRS in AVF is negative,the axis is

Accepted Answer

A) Normal. 
B) Right axis deviation. 
C) Left axis deviation. 
D) Indeterminate axis.

Question 8

A very widened QRS is seen in

Accepted Answer

A) Severe hypokalemia. 
B) Severe hyperkalemia. 
C) Severe hypocalcemia. 
D) Severe hypercalcemia.

Question 9

A disorder in which there is too much potassium in the bloodstream is called

Accepted Answer

A) Hyperkalemia. 
B) Hypokalemia. 
C) Hypercalcemia. 
D) Hypocalcemia.

Question 10

A hallmark of hypercalcemia on the EKG is

Accepted Answer

A) Sagging ST segments. 
B) Prolonged QT intervals. 
C) Shortened ST segments. 
D) Prolonged QRS intervals.

Question 11

If lead I and AVF both have negative QRS complexes,the axis is _____.

Accepted Answer

The answer of If lead I and AVF both have...

Question 12

Which of the following is a criterion for a diagnosis of BBB?

Accepted Answer

A) P wave wider than the QRS 
B) Heart rate greater than 100 
C) More P waves than QRS complexes 
D) QRS of 0.12 seconds or greater

Question 13

Left ventricular hypertrophy is most commonly caused by

Accepted Answer

A) Atrial fibrillation. 
B) Heart attack. 
C) Hypertension. 
D) Chronic lung disease.

Question 14

Critical rate is the rate at which _____.

Accepted Answer

The answer of Critical rate is the rate at which...

Question 15

Tall,pointy T waves are typical of

Accepted Answer

A) Hyperkalemia. 
B) Hypercalcemia. 
C) Hypercholesterolemia. 
D) Hypokalemia.

Question 16

Hypercalcemia is a disorder in which there is too much _____ in the bloodstream.

Accepted Answer

A) Cholesterol 
B) Calcium 
C) Calcitonin 
D) Potassium

Question 17

Left axis deviation is between

Accepted Answer

A) 0 and +90 degrees. 
B) 0 and -90 degrees. 
C) +90 and $\pm$180 degrees. 
D) -90 and $\pm$180 degrees.

Question 18

Hyperkalemia is a potassium deficit in the bloodstream.

Accepted Answer

A) True 
 B)False

Question 19

Right axis deviation is between

Accepted Answer

A) 0 and +90 degrees. 
B) 0 and -90 degrees. 
C) +90 and $\pm$180 degrees. 
D) -90 and $\pm$180 degrees.

Question 20

Hypertrophy can stress the heart.

Accepted Answer

A) True 
 B)False

Exam 12: How to Interpret a 12-Lead Ekg

An axis of -120 degrees is

The normal axis is between 0 and -90 degrees.

Bundle branch block is characterized by

Right ventricular hypertrophy is most commonly caused by

If the QRS in I and AVF are both negative,the axis is

If the heart's current originates in the left ventricle and travels upward to the right,there would be right axis deviation.

If the QRS in lead I is positive and the QRS in AVF is negative,the axis is

A very widened QRS is seen in

A disorder in which there is too much potassium in the bloodstream is called

A hallmark of hypercalcemia on the EKG is

If lead I and AVF both have negative QRS complexes,the axis is _____.

Which of the following is a criterion for a diagnosis of BBB?

Left ventricular hypertrophy is most commonly caused by

Critical rate is the rate at which _____.

Tall,pointy T waves are typical of

Hypercalcemia is a disorder in which there is too much _____ in the bloodstream.

Left axis deviation is between

Hyperkalemia is a potassium deficit in the bloodstream.

Right axis deviation is between

Hypertrophy can stress the heart.