Question 1

If Lead I and aVF both have negative QRS complexes,the axis is ________.

Accepted Answer

Indeterminate

Question 2

Digitalis effect is characterized by

Accepted Answer

A)  shortened PR intervals.
B)  widened QRS.
C)  sagging ST segments.
D)  prolonged ST segments. C

Question 3

A disorder in which there is a deficit of calcium in the bloodstream is called

Accepted Answer

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

Question 4

In severe hyperkalemia,the QRS can widen out significantly.

Accepted Answer

A) True 
 B)False

Question 5

Right bundle branch block (RBBB)is characterized by

Accepted Answer

A)  RSR configuration in V₁.
B)  tall,pointy P waves.
C)  symptoms of decreased cardiac output.
D)  more P waves than QRS complexes.

Question 6

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 7

Hypercalcemia is a calcium deficit in the bloodstream.

Accepted Answer

A) True 
 B)False

Question 8

Left ventricular hypertrophy is determined by adding ________.

Accepted Answer

The answer of Left ventricular hypertrophy is determined by adding...

Question 9

Normal axis is between

Accepted Answer

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

Question 10

Hyperkalemia is a potassium deficit in the bloodstream.

Accepted Answer

A) True 
 B)False

Question 11

Left bundle branch block (LBBB)

Accepted Answer

A)  is almost always indicative of heart disease.
B)  is more serious than RBBB.
C)  is characterized by a QS or RS pattern in V₁.
D)  all of the above.

Question 12

Right ventricular hypertrophy is commonly caused by chronic lung disease.

Accepted Answer

A) True 
 B)False

Question 13

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 14

A QS pattern in V₁ is characteristic of

Accepted Answer

A)  complete heart block.
B)  Mobitz II second-degree AV block.
C)  LBBB.
D)  RBBB.

Question 15

Low voltage EKGs can be caused by ALL BUT which of the following?

Accepted Answer

A)  Obesity
B)  Thyroid gland malfunction
C)  Emphysema
D)  Hypertension

Question 16

The normal axis is between 0 and -90 degrees.

Accepted Answer

A) True 
 B)False

Question 17

Bundle branch blocks are a sign of imminent cardiac arrest.

Accepted Answer

A) True 
 B)False

Question 18

If the QRS in leads I and aVF are both positive,the axis is

Accepted Answer

A)  normal.
B)  right axis deviation.
C)  left axis deviation.
D)  indeterminate axis.

Question 19

A very widened QRS is seen in

Accepted Answer

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

Question 20

In LVH,the S wave in V₁ added to the R wave in V₅ or V₆ should be

Accepted Answer

A)  greater than 20 mms.
B)  less than 30 mms.
C)  greater than 35 mms.
D)  less than 35 mms.

Exam 13: How to Interpret a 12-Lead EKG

If Lead I and aVF both have negative QRS complexes,the axis is ________.

Digitalis effect is characterized by

A disorder in which there is a deficit of calcium in the bloodstream is called

In severe hyperkalemia,the QRS can widen out significantly.

Right bundle branch block (RBBB) is characterized by

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

Hypercalcemia is a calcium deficit in the bloodstream.

Left ventricular hypertrophy is determined by adding ________.

Normal axis is between

Hyperkalemia is a potassium deficit in the bloodstream.

Left bundle branch block (LBBB)

Right ventricular hypertrophy is commonly caused by chronic lung disease.

If the QRS in Lead I is positive and the QRS in aVF is negative,the axis is

A QS pattern in V₁ is characteristic of

Low voltage EKGs can be caused by ALL BUT which of the following?

The normal axis is between 0 and -90 degrees.

Bundle branch blocks are a sign of imminent cardiac arrest.

If the QRS in leads I and aVF are both positive,the axis is

A very widened QRS is seen in

In LVH,the S wave in V₁ added to the R wave in V₅ or V₆ should be