Chapter 32
The scar tissue that occurs between the layers of the pericardium becomes rigid and constrictive from scar tissue in constrictive pericarditis. What is a physiologic sign of constrictive pericarditis?
Kussmaul sign
Cardiac tamponade
Mechanical compression of the heart
Antibodies directed against the M protein of certain strains of streptococcal bacteria seem to cross-react with glycoprotein antigens in the heart, joint, and other tissues to produce autoimmune response resulting in rheumatic fever and rheumatic heart disease. This occurs through what phenomenon?
Molecular mimicry
During an acute myocardial infarction (MI) there is ischemic damage to the heart muscle. The location and extent of the ischemic damage is the major predictor of complications, ranging from cardiac insufficiency to death following an (MI). What is the "window of opportunity" in restoring blood flow to the affected area so as to diminish the ischemic damage to the heart and maintain the viability of the cells?
20 to 40 minutes
Tetralogy of Fallot is a congenital condition of the heart that manifests in four distinct anomalies of the infant heart. It is considered a cyanotic heart defect due to the right-to-left shunting of the blood through the ventricular septal defect. A hallmark of this condition if the "get spells" that occur in these children. What is a test spell?
A hypercyanotic attack brought on by periods of stress.
Pericardial effusion
Accumulation of fluid in the pericardial cavity
ST-elevated myocardial infarction (STEMI) is accompanied by severe crushing pain. Morphine is the drug of choice used to treat the pain of STEMI when the pain cannot be relieved with oxygen and nitrates. Why is morphine considered the drug of choice in STEMI?
Action decreases metabolic demands of the heart
It is known that more than 100 different myocardial diseases can demonstrate clinical features associated with dilated cardiomyopathy (DCM). What is the most common identifiable cause of DCM in the United States?
Alcoholic cardiomyopathy
Mitral valve prolapse occurs frequently in the population at large. Its treatment is aimed at relieving symptoms and preventing complications of the disorder. Which drug is used in the treatment of mitral valve prolapse to relieve symptoms and aid in preventing complications?
B-adrenergic blocking drugs
Prinzmetal angina
Chest pain due to a coronary artery spasm
Unstable angina
Chest pain occurring while at rest
Effusive-constrictive pericarditis
Combination of effusion-tamponade and constriction
When an acute myocardial infarction (MI) occurs, many physiologic changes occur very rapidly. What causes the loss of contractile function of the heart within seconds of the onset of an MI?
Conversion from aerobic to anaerobic metabolism
Ischemia
Decreased blood flow to tissue
Heart failure in an infant usually manifests itself as tachypnea or dyspnea, both at rest and on exertion. When does this most commonly occur with an infant?
During feeding
Angina pectoris is a chronic ischemic coronary artery disease that is characterized by a symptomatic paroxysmal chest pain or pressure sensation associated with transient myocardial ischemia. What precipitates an attack of angina pectoris?
Emotional stress
Pulsus paradoxus
Exaggeration of the normal variation in the pulse during the inspiratory phase of respiration
Nearly everyone with pericarditis has chest pain. The acute pericarditis, the pain is abrupt in onset and sharp and radiates to the neck, back, abdomen, or sides. What can be done to ease the pain of acute pericarditis?
Have patient sit up and lean forward
Cardiomyopathies are classified as either primary of secondary. The primary cardiomyopathies are further classified as genetic, mixed, or acquired. Identify the following conditions as genetic, acquired, or mixed
Hypertrophic Cardiomyopathy - genetic Left Ventricular noncompaction - genetic Myocarditis - acquired Dilated Cardiomyopathy - mixed Peripartum cardiomyopathy - acquired
Infective endocarditis
Invasion of the heart valves and the mural endocardium by a microbial agent
Silent myocardial ischemia
Occurs in the absence of anginal pain
Cardiac tamponade is a serious life-threatening condition that can arise from a number of other conditions. What is a key diagnostic finding in cardiac tamponade?
Pulsus paradoxus
Heart attack
ST-segment elevation myocardial infarction
The diagnosis of chronic stable angina is based on a detailed pain history, the presence of risk factors invasive and noninvasive studies, and laboratory studies. What test is not used in the diagnosis of angina?
Serum biochemical markers
Unstable angina/non-ST-segment elevation myocardial infarction is a clinical syndrome that ranges in severity between stable angina to myocardial infarction (MI). It is classified according to its risk of causing an acute MI and is diagnosed based on what?
Serum biomarkers ECG pattern
Unstable plaque, a condition of atherosclerotic heart disease, occurs in unstable angina and myocardial infarction. Unstable plaque can rupture, causing platelet aggregation and thrombus formation. What are the major determinants of the vulnerability of plaque to rupture?
Size of lipid-rich core Presence of inflammation Thickness of fibrous cap
In infective endocarditis, vegetative lesions grow on the valves of the heart. These vegetative lesions consist of a collection of infectious organisms and cellular debris enmeshed in the fibrin strands of clotted blood. What are the possible systemic effects of these vegetative lesions?
They can fragment and cause cerebral emboli
A patient with a suspected myocardial infarction (MI) is brought to the emergency department by ambulance. As the nurse is caring for this patient, what lab work would you expect to receive an order for to confirm a diagnosis of MI?
Troponin level
