When is afterload low - Study guides, Class notes & Summaries

Nitroprusside purpose CORRECT ANSWER decreases preload and afterload by vasodilation (mainly afterload) Dobutamine mechanism of action CORRECT ANSWER contractility Dopamine at a low-end dose "renal dose" CORRECT ANSWER 0.5-4mcg/kg/min increases renal and mesentric perfusion Dopamine at a mid-range dose CORRECT ANSWER 4-10mcg/kg/min increases contractility and heart rate Dopamine at a high-range dose CORRECT ANSWER greater than 10mcg/kg/min vasoconstriction and increases BP ...

RN Pharmacology A Relias A | Exam Questions With Answers | 100% Correct| 2023/2024. Potassium chloride 10 mEq intravenously has been ordered for a client whose potassium is 2.9 following diuretics. How will the nurse administer the potassium dose? A) Dilute the dose in a 50 ml IV rider and infused over 1 hour B) Push the dose as a rapid IV push because of the patient’s dangerously low potassium level C) Push the dose slowly over 10 minutes D) Ask to give the dose in a large muscle since t...

minimum urine output for adult 0.5mL/kg/hr ADH (antidiuretic hormone) - water retainer - vasoconstrictor (also called Vasopressin) - produced by hypothalamus - store and released from posterior pituitary ADH pathway - hypothalamus senses low blood volumed and increased serum osmolality - signal pituitary to release ADH - ADH causes kidney to retain water - water retention increases blood volume and decreases serum osmolality ANP (atrial natriuretic peptide) -...

Coronary artery perfusion is dependent upon: A. diastolic pressure B. systolic pressure C. afterload D. systemic vascular resistance (SVR) Correct Answers A. diastolic pressure Diastolic pressure in the aortic root is higher than left ventricular end-diastolic pressure (LVEDP), the pressure exerted on the ventricular muscle at the end of diastole when the ventricle is full. This enables blood to flow from a higher pressure through open arteries to a lower pressure, a pressure gradient known...

Nitroprusside purpose - Answer- decreases preload and afterload by vasodilation (mainly afterload) Dobutamine mechanism of action - Answer- contractility Dopamine at a low-end dose "renal dose" - Answer- 0.5-4mcg/kg/min increases renal and mesentric perfusion Dopamine at a mid-range dose - Answer- 4-10mcg/kg/min increases contractility and heart rate Dopamine at a high-range dose - Answer- greater than 10mcg/kg/min vasoconstriction and increases BP Dopamine and Levophed inf...

The nurse is caring for a patient admitted with hypovolemic shock. The nurse palpates thready brachial pulses but is unable to auscultate a blood pressure. What is the best nursing action? a. Assess the blood pressure by Doppler. b. Estimate the systolic pressure as 60 mm Hg. c. Obtain an electronic blood pressure monitor. d. Record the blood pressure as not assessable. A ~ Auscultated blood pressures in shock may be significantly inaccurate due to vasoconstriction. If blood pressure is not...

NUR 652 Final Exam Study Questions with Answers All Correct 2023. Why are nitrate-free periods every 24 hours necessary for the patient on nitroglycerin therapy? To inhibit the development of tolerance What does a low level of thyroid-stimulating hormone indicate? Hyperthroidism What would be the best option to treat a newly diagnosed patient with a low TSH level with? Propanolol (Inderal) Spironoaldactone (Aldactone) has what mechanism of action (MOA)? Aldosterone antagonist Heparin exer...

MN 551 Midterm Exam 2023/2024 Saved A patient is experiencing impaired circulation secondary to increased systemic arterial pressure. Which of the following statements is the most relevant phenomenon? Question 1 options: Increased preload due to vascular resistance High afterload because of backpressure against the left ventricle Impaired contractility due to aortic resistance Systolic impairment because of arterial stenosis Question 2 (2 points) Saved A nurse practitioner employe...

What is the most important sign in a critically ill pt? Why? - ANSWER-Tachypnea Indicates metabolic acidosis w/ respiratory alkalosis compensation A pt misses dialysis for a few days and comes in with fluid overload. He's tachycardic and tachypneic. On physical exam, you find JVD, pulsus paradoxus (20 mmHg drop during inspiration), and HoTN (80/40) with distant, muffled heart sounds. Lungs are clear to auscultation. What is the dx? - ANSWER-Cardiac tamponade; obstructive shock If a pt ...

How does chronic aortic stenosis lead to left ventricular hypertrophy? Chronic aortic stenosis leads to left ventricular hypertrophy bc of increased workload of pumping blood through a narrow opening. The left atrium can also enlarge but mainly causes left ventricular hypertrophy. The right ventricle will remain normal for a period of time. That's why LHF happens first then leads to RHF. Chronic mitral stenosis will cause enlargement in which area? Left atria hypertrophy. In pt with Mitral v...