CRAT Exam
Chronotropic - correct answer-heart rate
Inotropic - correct answer-force of myocardial contractility
Dromotropic - correct answer-conduction velocity through the AV node
Systole - correct answer-contraction of chamber, blood is being ejected. Pressure rises
during systole.
Diastole - correct answer-rest, relaxation of chamber, chamber is allowed to fill. Pressure
falls during diastole.
Stroke Volume - correct answer-the amount of blood left ventricle pumps in each beat.
(mL/beat)
Cardiac output- definition - correct answer-The amount of blood pumped into the aorta each
minute. (units= mL/min)
Cardiac output- equation - correct answer-(HR) X (Stroke Volume) Avg. healthy adult= 4-8
L/min
Venous return - correct answer-amount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition - correct answer-force exerted by the blood against the walls of
the arteries as the ventricles contract and relax
Blood pressure- equation - correct answer-(cardiac output) X (peripheral resistance) or you
could put it another way: (HR)(Stroke Volume)(Peripheral Resistance)
An increase in Potassium or decrease in Calcium cause the heart to be ____. - correct
answer-flaccid, limp, dilated, lower HR
Excess Calcium can cause the heart to be _____. - correct answer-spastic contractions.
Although about 70% of ventricular filling occurs passively, ______ ______ contributes an
additional 10% to 30% of blood flow to ventricular filling. - correct answer-atrial kick
The area in the middle of the thoracic cavity in which the heart lies is the: - correct
answer-Mediastinum
The inferior surface of the heart is formed by the - correct answer-Right and left ventricles
Chronotropic - correct answer-heart rate
Inotropic - correct answer-force of myocardial contractility
Dromotropic - correct answer-conduction velocity through the AV node
Systole - correct answer-contraction of chamber, blood is being ejected. Pressure rises
during systole.
Diastole - correct answer-rest, relaxation of chamber, chamber is allowed to fill. Pressure
falls during diastole.
Stroke Volume - correct answer-the amount of blood left ventricle pumps in each beat.
(mL/beat)
Cardiac output- definition - correct answer-The amount of blood pumped into the aorta each
minute. (units= mL/min)
Cardiac output- equation - correct answer-(HR) X (Stroke Volume) Avg. healthy adult= 4-8
L/min
Venous return - correct answer-amount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition - correct answer-force exerted by the blood against the walls of
the arteries as the ventricles contract and relax
Blood pressure- equation - correct answer-(cardiac output) X (peripheral resistance) or you
could put it another way: (HR)(Stroke Volume)(Peripheral Resistance)
An increase in Potassium or decrease in Calcium cause the heart to be ____. - correct
answer-flaccid, limp, dilated, lower HR
Excess Calcium can cause the heart to be _____. - correct answer-spastic contractions.
Although about 70% of ventricular filling occurs passively, ______ ______ contributes an
additional 10% to 30% of blood flow to ventricular filling. - correct answer-atrial kick
The area in the middle of the thoracic cavity in which the heart lies is the: - correct
answer-Mediastinum
The inferior surface of the heart is formed by the - correct answer-Right and left ventricles
