CRAT Exam
Chronotropic - answerheart rate
Inotropic - answerforce of myocardial contractility
Dromotropic - answerconduction velocity through the AV node
Systole - answercontraction of chamber, blood is being ejected. Pressure rises during
systole.
Diastole - answerrest, relaxation of chamber, chamber is allowed to fill. Pressure falls
during diastole.
Stroke Volume - answerthe amount of blood left ventricle pumps in each beat. (mL/beat)
Cardiac output- definition - answerThe amount of blood pumped into the aorta each
minute. (units= mL/min)
Cardiac output- equation - answer(HR) X (Stroke Volume) Avg. healthy adult= 4-8 L/min
Venous return - answeramount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition - answerforce exerted by the blood against the walls of the
arteries as the ventricles contract and relax
Blood pressure- equation - 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 ____. -
answerflaccid, limp, dilated, lower HR
Excess Calcium can cause the heart to be _____. - answerspastic contractions.
Although about 70% of ventricular filling occurs passively, ______ ______ contributes
an additional 10% to 30% of blood flow to ventricular filling. - answeratrial kick
Chronotropic - answerheart rate
Inotropic - answerforce of myocardial contractility
Dromotropic - answerconduction velocity through the AV node
Systole - answercontraction of chamber, blood is being ejected. Pressure rises during
systole.
Diastole - answerrest, relaxation of chamber, chamber is allowed to fill. Pressure falls
during diastole.
Stroke Volume - answerthe amount of blood left ventricle pumps in each beat. (mL/beat)
Cardiac output- definition - answerThe amount of blood pumped into the aorta each
minute. (units= mL/min)
Cardiac output- equation - answer(HR) X (Stroke Volume) Avg. healthy adult= 4-8 L/min
Venous return - answeramount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition - answerforce exerted by the blood against the walls of the
arteries as the ventricles contract and relax
Blood pressure- equation - 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 ____. -
answerflaccid, limp, dilated, lower HR
Excess Calcium can cause the heart to be _____. - answerspastic contractions.
Although about 70% of ventricular filling occurs passively, ______ ______ contributes
an additional 10% to 30% of blood flow to ventricular filling. - answeratrial kick
