NUR 555 -quiz 5 : Questions And Answers With Verified Study Solutions Rated A+ (SNHU)

In systolic heart failure, what effect does the renin-angiotensin-aldosterone system (RAAS) have on stroke volume? Select one. Question options: a) Decreases preload and decreases afterload b) Decreases preload and increases afterload c) Increases preload and decreases afterload d) Increases preload and increases afterload Hide question 1 feedback Feedback Activation of the RAAS increases preload through the effects of aldosterone secretion, a activity. RAAS also increases afterload through vasoconstriction mediated by angiotensi 1.2 / 1.2 points What is an expected change in the cardiovascular system that occurs with aging? Select one. Question options: a) Arteriosclerosis b) Decreased left ventricular wall tension c) Arterial stiffening d) Decreased aortic wall thickness Hide question 2 feedback Feedback Arterial stiffening occurs with aging even in the absence of clinical hypertension. Aging the other conditions. 1.2 / 1.2 points A healthcare provider is assessing a patient who has a pericardial effusion and notes a pulsus paradoxus. A student asks for an explanation of how this occurs. What description by the professional is best? Select one. Question options: a) Blood ejected from the left atrium and reduction of blood volume in the left ventric b) Blood ejected from the right atrium and reduction of blood volume in the right ven c) Diastolic filling pressures of the right ventricle and reduction of blood volume in bo d) Diastolic filling pressures of the left ventricle and reduction of blood volume in all Hide question 3 feedback Feedback Pulsus paradoxus means that the arterial blood pressure during expiration exceeds arte ion 4 1.2 / 1.2 points What is the major determinant of the resistance that blood encounters as it flows through the systemic circulation? Select one. Question options: a) Force of ventricular contraction b) Volume of blood in the systemic circulation c) Muscle layer of the metarterioles d) Muscle layer of the arterioles Hide question 4 feedback Feedback The muscle layer of the arterioles constricts or dilates depending on the stimulation it the diameter of the vessels determines the resistance to blood flow. Blood viscosity usua however severe fluid loss can increase it, leading to an increase in resistance. This is no determinant however. The force of contraction does not determine resistance to flow. ion 5 ion 6 1.2 / 1.2 points A patient has a disorder affecting ventricular depolarization. What ECG finding would the healthcare professional associate with this condition? Select one. Question options: a) QT interval variability b) Absence of P waves c) Shortened PR interval d) Prolonged QRS interval Hide question 5 feedback Feedback The QRS complex represents the sum of all ventricular muscle cell depolarizations. If a findings suggestive of problems with this activity, there would be prolongation of the QR interval reflects the amount of time needed for the action potential to travel from the atr QT interval variability is normal. An absence of P waves would indicate a problem with t 1.2 / 1.2 points The healthcare professional explains to a student that the amount of volume of blood in the heart is directly related to the of contraction. Select one. Question options: a) Speed b) Strength c) Viscosity d) Pressure Hide question 6 feedback Feedback As stated in the Frank-Starling law, the volume of blood in the heart at the end of diasto muscle fibers) is directly related to the force (strength) of contraction during the next sy the only option that accurately describes the relationship associated with the Frank-Star ion 7 ion 8 ion 9 1.2 / 1.2 points Amyloidosis, hemochromatosis, or glycogen storage disease usually causes which form of cardiomyopathy? Select one. Question options: a) Hypertrophic b) Infiltrative c) Septal d) Restrictive Hide question 7 feedback Feedback Restrictive cardiomyopathy may occur idiopathically or as a cardiac manifestation of sys scleroderma, amyloidosis, sarcoidosis, lymphoma, and hemochromatosis, or a number of diseases. This characterization is not true of the other forms of cardiomyopathy. 1.2 / 1.2 points A student asks the healthcare professional to explain the function of the papillary muscles. What response by the professional is best? Select one. Question options: a) The papillary muscles close the semilunar valves. b) They open the atrioventricular valves. c) These muscles prevent backward expulsion of the atrioventricular valves. d) The papillary muscles open the semilunar valves. Hide question 8 feedback Feedback The papillary muscles are extensions of the myocardium that pull the cusps of the AV va downward at the onset of ventricular contraction, thus preventing their backward expul do not close the semilunar valves or open the AV valves or semilunar valves. 1.2 / 1.2 points A patient reports chest pain that occurs most often during sleep. What treatment does the healthcare professional discuss with the patient? Select one. Question options: a) A low-dose aspirin regimen b) Short-acting nitroglycerin tablets c) Treatment of obstructive sleep apnea d) Oral calcium channel blockers Hide question 9 feedback Feedback Prinzmetal angina (also called variant angina) is chest pain attributable to transient isch myocardium that occurs unpredictably and almost exclusively at rest. The typical treatm long-acting nitrites or calcium channel blockers. Treating sleep apnea, taking short-acti taking low dose aspirin will not benefit the patient.