vv vv vv vv vv vv vv vv vv
Table of Contents:
vv vv vv
Chapter1.Anatomy & Physiology
v v vv v
Chapter2.Basic Electrophysiology
v v vv
Chapter3.Sinus Mechanisms
v v vv
Chapter 4. Atrial Rhythms
v vv vv
Chapter5.Junctional Rhythms
v v vv
Chapter6. VentricularRhythms
v v v
Chapter7.AtrioventricularBlocks
v v v
Chapter8.PacemakerRhythms
v v v
Chapter9.Introduction to the 12-Lead ECG
v v vv vv v vv
Chapter10.Post-Test
v v
,Chapter 01: Anatomy and Physiology
vv vv vv vv
Aehlert:ECGs Made Easy,7th Edition
vv v vv vv v v
MULTIPLE CHOICE vv
1. The apex of the heart is formed by the
vv vv vv vv vv vv vv vv .
a. tip of the left ventricle
vv vv vv vv
b. tip of the right atrium
vv vv vv vv
c. right atrium and right ventricle
vv vv vv vv
d. left atrium and left ventricle
vv vv vv vv
ANS: A v v
The heart’s apex, or lower portion, is formed by the tip of the left ventricle. The apex lies just
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
above the diaphragm, between the fifth and sixth ribs, in the midclavicular line.
vv vv vv vv vv vv vv vv vv vv vv vv vv
OBJ: v v v v Identify the surfaces of the heart. vv vv vv vv vv
2. The left atrium receives blood from the
vv vv vv vv vv vv .
a. pulmonary veins vv
b. aorta
c. pulmonary arteries vv
d. inferior vena cava vv vv
ANS: A v v
The left atrium receives freshly oxygenated blood from the lungs via the right and left
vv vv vv vv vv vv vv vv vv vv vv vv vv vv
pulmonary veins.
vv vv
OBJ: v v v v Identify and describe the chambers of the heart and the vessels that enter or leave each.
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
3. The anterior surface of the heart consists primarily of the
vv vv vv vv vv vv vv vv vv .
a. left atrium vv
b. right atrium vv
c. left ventricle vv
d. right ventricle vv
ANS: D v v
The front (anterior) surface of the heart lies behind the sternum and costal cartilages. It
vv vv vv vv vv vv vv vv vv vv vv vv vv vv
is formed by portions of the right atrium and the left and right ventricles. However,
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
because the heart is tilted slightly toward the left in the chest, the right ventricle is the
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
area of the heart that lies most directly behind the sternum.
vv vv vv vv vv vv vv vv vv vv vv
OBJ: v v v v Identify the surfaces of the heart. vv vv vv vv vv
4. Blood pressure is determined by
vv multiplied by vv vv vv vv .
a. stroke volume; heart rate vv vv vv
b. heart rate; cardiac output vv vv vv
c. cardiac output; peripheral vascular resistance
vv vv vv vv
d. stroke volume; peripheral vascular resistance
vv vv vv vv
ANS: C v v
Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance.
vv vv vv vv vv vv vv vv vv vv vv
, OBJ: v v v v Identify and explain the components of blood pressure and cardiac output.
vv vv vv vv vv vv vv vv vv vv
5. The right atrium receives venous blood from the head, neck, and thorax via the , from
vv vv vv vv vv vv vv vv vv vv vv vv vv v
vvthe remainder of the body via the , and from the heart via the
vv vv vv vv vv vv vv vv vv vv vv vv .
a. coronary sinus; superior vena cava; inferior vena cava
vv vv vv vv vv vv vv
b. superior vena cava; coronary sinus; inferior vena cava
vv vv vv vv vv vv vv
c. inferior vena cava; superior vena cava; coronary sinus
vv vv vv vv vv vv vv
d. superior vena cava; inferior vena cava; coronary sinus
vv vv vv vv vv vv vv
ANS: D v v
The right atrium receives blood low in oxygen from the superior vena cava, which
vv vv vv vv vv vv vv vv vv vv vv vv vv
carries blood from the head and upper extremities; the inferior vena cava, which carries
vv vv vv vv vv vv vv vv vv vv vv vv vv vv
blood from the lower body; and the coronary sinus, which is the largest vein that
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
drains the heart.
vv vv vv
OBJ: v v v v Identify and describe the chambers of the heart and the vessels that enter or leave each.
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
6. The heart is divided into
vv vv vv vv chambers but functions as a vv vv vv vv -sided pump. vv
a. two; four vv
b. three; two vv
c. four; two vv
d. four; three vv
ANS: C v v
The heart has four chambers: two atria and two ventricles. The right and left sides of the
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
heart are separated by an internal wall of connective tissue called a septum. The
vv vv vv vv vv vv vv vv vv vv vv vv vv vv
interatrial septum separates the right and left atria. The interventricular septum
vv vv vv vv vv vv vv vv vv vv vv
separates the right and left ventricles. The septa separate the heart into two functional
vv vv vv vv vv vv vv vv vv vv vv vv vv vv
pumps. The right atrium and right ventricle make up one pump. The left atrium and
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
left ventricle make up the other.
vv vv vv vv vv vv
OBJ: v v v v Identify and describe the chambers of the heart and the vessels that enter or leave each.
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
7. Stimulation of alpha1 receptors results in vv vv vv vv vv .
a. increased heart rate vv vv
b. peripheral vasoconstriction vv
c. constriction of bronchial smooth muscle vv vv vv vv
d. increased force of myocardial contraction vv vv vv vv
ANS: B v v
Alpha1 receptors are found in the eyes, blood vessels, bladder, and male reproductive organs.
vv vv vv vv vv vv vv vv vv vv vv vv vv
Stimulation of alpha1 receptor sites results in constriction.
vv vv vv vv vv vv vv vv
OBJ: vv vv Compare and contrast the effects of sympathetic and parasympathetic stimulation of the heart.
vv vv vv vv vv vv vv vv vv vv vv vv
8. Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
a. Left
b. Right
ANS: B v v
The job of the right side of the heart is to pump unoxygenated blood to and through the
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
lungs to the left side of the heart. This is called the pulmonary circulation. The right side
vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv vv
of the heart is a low-pressure system.
vv vv vv vv vv vv vv