Deck 12: Electrocardiographic Interpretation of Cardiac Muscle and Coronary Blood Flow Abnormalities: Vectorial Analysis

Question 1

A ventricular depolarization wave when traveling 210 $\degree$ in the frontal plane will cause a large positive deflection in

A)aVR
B)aVL
C)Lead II
D)Lead III
E)aVF

Answer 1

aVR

Question 2

Following Questions : A 60-year-old woman had the following EKG recorded at a local emergency room following an automobile accident. Her weight was 70 kg and her aortic blood pressure was 140/80 mmHg.
What is the heart rate using lead I for the calculation?

A)75
B)88
C)100
D)112
E)148

Answer 2

A

Question 3

Following Questions :A 65-year-old man went for an annual checkup and had the following EKG recorded at his physician's office.

-What is the mean electrical axis calculated from standard leads I, II, and III shown in his EKG? A. $- 50 ^ { \circ }$
B. $- 15 ^ { \circ }$
C. $0 ^ { \circ }$
D. $+ 15 ^ { \circ }$
E. $+ 50 ^ { \circ }$

Answer 3

B

Question 4

Following Questions :A 70-year-old man had the following EKG recorded at his doctor's office. His weight was 80 kg and his blood pressure was 160/90 mmHg. He complained that he gets tired easily.
What type of heart murmur does this patient have?

A)tricuspid valve regurgitation
B)completeri bundle branch block
C)pulmonary valve stenosis
D)pulmonary valve regurgitation
E)aortic regurgitation

Question 5

A ventricular depolarization wave when traveling -30 $\degree$ in the frontal plane will cause a large positive deflection in:

A)aVR
B)aVL
C)Lead II
D)Lead III
E)aVF

Question 6

Following Questions :A 65-year-old man went for an annual checkup and had the following EKG recorded at his physician's office.
What is the most likely diagnosis?

A)Right ventricular hypertrophy
B)Left bundle branch block
C)Pulmonary valve insufficiency
D)Right bundle branch block
E)Systemic hypertension

Question 7

Following Questions :A 6-year-old boy had the following EKG recorded at his physician's office. He had little energy, and during light exercise his respiratory would increase rapidly.

-What is his mean electrical axis calculated from standard leads I, II, and III shown in his EKG? A. $- 100 ^ { \circ }$
B. $- 20 ^ { \circ }$
C. $0 ^ { \circ }$
D. $+ 90 ^ { \circ }$
E. $+ 170 ^ { \circ }$

Question 8

Following Questions : A 50-year-old woman was admitted to a local emergency room following a motorcycle accident, and the following EKG was taken.
What is her heart rate? Use lead I for the calculation.

A)56
B)66
C)76
D)103
E)152

Question 9

A seventy-year-old woman came into the local emergency room complaining of chest pain and shortness of breath. Blood samples were taken for cardiac enzyme measurements, and an EKG was quickly taken. Based on the EKG tracing shown below, what is the likely diagnosis?

A)Left bundle branch block
B)Acute anterior wall infarction in the left ventricle
C)Acute anterior wall infarction in the right ventricle
D)Acute posterior infarction in the left ventricle
E)Acute posterior infarction in the right ventricle

Question 10

Following Questions : A 60-year-old woman had the following EKG recorded at a local emergency room following an automobile accident. Her weight was 70 kg and her aortic blood pressure was 140/80 mmHg.

-What is the mean electrical axis calculated from standard leads I, II, and III shown in the woman's EKG? A. $- 90 ^ { \circ }$
B. $- 50 ^ { \circ }$
C. $- 12 ^ { \circ }$
D. $+ 105 ^ { \circ }$
E. $+ 170 ^ { \circ }$

Question 11

During the S-T interval in an electrocardiogram of a patient with a damaged cardiac muscle

A)the entire heart is depolarized
B)all the heart is depolarized except for the damaged cardiac muscle
C)about half the heart is depolarized
D)all of the heart is repolarized
E)all of the heart is repolarized except for the damaged cardiac muscle

Question 12

A seventy-five year-old woman came into a local emergency room complaining of chest pain and shortness of breath. Blood samples were taken for cardiac enzyme measurements, and an EKG was quickly taken. Based on the EKG tracing shown below, what is the likely diagnosis?

A)Left bundle branch block
B)Acute anterior wall infarction in the base of the heart
C)Acute anterior wall infarction in the apex of the heart
D)Acute posterior infarction in the base of the heart
E)Acute posterior infarction in the apex of the heart

Question 13

A ventricular depolarization wave when traveling -60 $\degree$ in the frontal plane will cause a large positive deflection in

A)aVR
B)aVL
C)Lead II
D)Lead III
E)aVF

Question 14

A 30-year-old woman had an EKG taken, and her QRS complex had a width of 0.20 seconds, her T wave was inverted in lead I, and the R wave had a large negative deflection in lead III. What is her diagnosis?

A)Right ventricular hypertrophy
B)Left bundle branch block
C)Pulmonary valve stenosis
D)Right bundle branch block
E)Left ventricular hypertrophy

Question 15

Following Questions :A 70-year-old man had the following EKG recorded at his doctor's office. His weight was 80 kg and his blood pressure was 160/90 mmHg. He complained that he gets tired easily.
What is the heart rate using lead I for the calculation?

A)75
B)88
C)100
D)112
E)148

Question 16

Following Questions : A 60-year-old woman had the following EKG recorded at a local emergency room following an automobile accident. Her weight was 70 kg and her aortic blood pressure was 140/80 mmHg.
What is her likely diagnosis?

A)mitral valve stenosis
B)aortic stenosis
C)pulmonary valve stenosis
D)left bundle branch block
E)left ventricular hypertrophy

Question 17

Following Questions :A 70-year-old man had the following EKG recorded at his doctor's office. His weight was 80 kg and his blood pressure was 160/90 mmHg. He complained that he gets tired easily.

-What is the mean electrical axis calculated from standard leads I, II, and III shown in the man's EKG?
A. $- 90 ^ { \circ }$
B. $- 60 ^ { \circ }$
C. $- 15 ^ { \circ }$
D. $+ 60 ^ { \circ }$
E. $+ 170 ^ { \circ }$

Question 18

Mr. Smith had his EKG measured at UMC, but they lost his records. The EKG technician remembered that the QRS deflection was large and positive in Lead II and 0 in aVL. His mean electrical axis in the frontal plane is A. $90 ^ { \circ }$
B. $60 ^ { \circ }$
C. $0 ^ { \circ }$
D. $- 60 ^ { \circ }$
E. $- 90 ^ { \circ }$

Question 19

Following Questions :A 6-year-old boy had the following EKG recorded at his physician's office. He had little energy, and during light exercise his respiratory would increase rapidly.
What is his diagnosis?

A)Left ventricular hypertrophy
B)Left bundle branch block
C)Tricuspid stenosis
D)Right bundle branch block
E)Tetralogy of Fallot