NURS 6501N Week 3 CV Knowledge Check Answers

Use these answers to study for the Midterm Scenario 1: Myocardial Infarction CC: “I woke up this morning at 6 a.m. with numbness in my left arm and pain in my chest. It feels tight right here (mid-sternal).” “My dad had a heart attack when he was 56-years-old and I am scared because I am 56-years-old.” HPI: Patient is a 56-year-old Caucasian male who presents to Express Hospital Emergency Department with a chief complaint of chest pain that radiates down his left arm. He states this started this morning and has been getting worse, pointing to the mid-sternal area, “it feels like an elephant is sitting on my chest and having a hard time breathing”. He rates the pain as 9/10. Nothing has made the pain better or worse. He denies any previous episode of chest pain. Denies nausea, or lightheadedness. Nitroglycerin 0.4 mg tablet sublingual x 1 which decreased pain to 7/10. Lipid panel reveals Total Cholesterol 424 mg/dl, high density lipoprotein (HDL) 26 mg/dl, Low Density Lipoprotein (LDL) 166 mg/dl, Triglycerides 702 mg/dl, Very Low-Density Lipoprotein (VLDL) 64 mg/dl His diagnosis is an acute inferior wall myocardial infarction. Questions: 1. Which cholesterol is considered the “good” cholesterol and what does it do? Answer: HDL is considered the good cholesterol because it collects excess cholesterol in the body cells and transports it to the liver where it is excreted in the body cells and transports it to the liver where it is excreted in the body. HDL carries 20-25% of total plasma cholesterol. 2. How does inflammation contribute to the development of atherosclerosis? Answer: Inflammation in the heart muscle caused by chronic inflammatory processes leads to mitochondrial damage that results in an increased free radical production that further activates the chronic inflammatory vicious cycle. 1 lOMoARcPSD| Scenario 2: Pleural Friction Rub A 35-year-old female with a positive history of systemic lupus erythematosus (SLE) presents to the Emergency Room (ER) with complaints of sharp retrosternal chest pain that worsens with deep breathing or lying down. She reports a 5-day history of low-grade fever, listlessness and says she feels like she had the flu. Physical exam reveals tachycardia and a pleural friction rub. She was diagnosed with acute pericarditis. Question: 3. Because of the result of a pleural friction rub, what does the APRN recognize? Answer: The inflammation of the pericardium, due to either the underlying autoimmune disease or a post viral syndrome, causes roughening of the pericardium. The roughening of the pericardium causes the classic “rub” which can best be heard at the apex of the heart and left sternal border. Scenario 4: Deep Venous Thrombosis (DVT) A 81-year-old obese female patient who 48 hours post-op left total hip replacement. The patient has had severe nausea and vomiting and has been unable to go to physical therapy. Her mucus membranes are dry. The patient says the skin on her left leg is too tight. Exam reveals a swollen, tense, and red colored calf. The patient has a duplex ultrasound which reveals the presence of a deep venous thrombosis (DVT). Question: 4. Given the history of the patient explain what contributed to the development of a deep venous thrombosis (DVT) Answer: Virchow’s Triad caused damage to the walls of the vessels. When there is injury to the intimal layer of the vessel, antiplatelet substances such as nitric oxide and prostacyclin, along with the expression of collagen on the vessel wall, causes adherence of the platelets to the vessel wall. The platelets become activated then aggregate forming clots. Venous stasis because of obesity, patient’s advanced age and inability to go to physical therapy. 2 lOMoARcPSD| Scenario 5: COPD A 66-year-old female with a 50 pack/year history of cigarette smoking had a CT scan and was diagnosed with emphysema. He asks if this means he has chronic obstructive pulmonary disease (COPD). Question: 5. There is a clear relationship between emphysema and COPD, explain the pathophysiology of emphysema and the relationship to COPD. Answer: Emphysema is a disease of the airways that causes permanent enlargement of the gas exchange airways. It is accompanied by destruction of the alveolar walls do not appear to be fibrotic. Chronic exposure to irritants recruits neutrophils, macrophages, and lymphocytes to the lung resulting in progressive damage from inflammatory oxidative stress. Emphysema is characterized by destruction of alveoli leading to decreased surface area for gas exchange that causes significant ventilation/perfusion mismatch.