CRAT Exam Study Guide with Complete Solutions 100% Verified 2024 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 1 / 2
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 Receives blood from the superior and inferior vena cavae and the coronary sinus - Correct Answer The right atrium The right ventricle - Correct Answer Pumps unoxygenated blood into the pulmonary circulation The _____ pericardium is the inner layer of the pericardium, which is also the outer layer of the heart wall called the _____. - Correct Answer Visceral, epicardium When a ventricle relaxes in the normal heart, blood is prevented from flowing back into it by - Correct Answer A semilunar valve Which of the following conditions are potentially reversible? - Correct Answer Myocardial ischemia and myocardial injury Which of the following is the innermost layer of the heart that lines its inner chambers, valves and is continuous with the innermost layers of the arteries, veins and capillaries of the body? - Correct Answer Endocardium Which of the following statements is CORRECT - Correct Answer A branch of the right coronary artery supplies the right atrium and the right ventricle The main electrolytes that affect cardiac function are - Correct Answer Sodium, potassium, chloride, calcium
- / 2