[Exam 2/NO] Chapter 25: Assessment of Cardiovascular Function (Page 671-705) Flashcards
Acute coronary syndrome definition
a constellation of signs and symptoms due to the rupture of atherosclerotic plaque and resultant partial or complete thrombosis within a diseased coronary artery; leads to unstable angina or acute myocardial infarction
Afterload definition
the amount of resistance to ejection of blood from the ventricle
Apical impulse definition
caused by contraction of left ventricle
Atrioventricular (AV) node definition
secondary pacemaker of the heart, located in the right atrial wall near the tricuspid valve
Baroreceptors definition
nerve fibers located in the aortic arch and carotid arteries that are responsible for control of the blood pressure
cardiac catheterization definiton
an invasive procedure used to measure cardiac chamber pressures and assess patency of the coronary arteries
Cardiac conduction system definition
specialized heart cells strategically located throughout the heart that are response for methodically generating and coordinating the transmission of electrical impulses to the myocardial cells
Cardiac output definition
amount of blood pumped by each ventricle in liters per minute
Cardiac stress test definition
a test used to evaluate the functioning of the heart during a period of increased oxygen demand
Contractility definition
ability of the cardiac muscle to shorten in response ot an electrical impulse
depolarization definition
electrical activation of a cell cause dby the influx of sodium into the cell while potassium exits the cell
diastole definition
period of ventricular relaxation resulting in ventricular filling
ejection fraction definition
percentage of the end-diastolic blodo volume ejected from the ventricle with each heartbeat
hemodynamic monitoring definition
the use of pressure monitoring devices to directly measure cardiovascular function
hypertension definition
blood pressure greater than 140//90
hypotension definition
decrease in blood pressure less than 100/60
murmurs definition
sounds created by abnormal, turbulent flow of blood in the heart
myocardial ischemia definition
condition in wich heart muscle cells receive less oxygen than needed
myocardium definition
muscle layer of the heart responsible for the pumping action of the heart
opening snaps definition
abnormal diastolic sound generated during opening of a rigid atrioventricular valve leaflet
postural (orthostatic) hypotension definition
significant drop in blood pressure (20 mm systolic or 10 diastolic) after an upright posture is assumed
preload definition
degree of stretch of cardiac muscle fibers at the end of diastole
pulmonary vascular resistance definition
resistance to blood flow out of the right ventricle created by the pulmonary circulatory system
pulse deficit definition
difference between apical and radial pulse rates
radioisotopes definition
unstable atoms that give off small amounts of energy in the form of gamma rays as they decay
repolarization definition
returns of the cell to resting state, caused by reentry of potassium into the cell while sodium exits
s1 definition
first heart sound produced by closure of atrioventricular (mitral and tricuspid) valves
S2 definition
the second heart sound produced by closure of the semilunar (aortic and pulmonic) valves
SA Node definition
primary pacemaker of the heart, in right atrium
stroke volume definition
amount of blood ejected from one of the ventricles per heartbeat
summation gallop definition
abnormal sounds created by the presence of an S3 and S4 during periods of tachycardia
systemic vascular resistance definition
resistance to blood flow out of the left ventricle created by teh systemic circulatory system
systole definition
period of ventricular contraction resulting in ejeciton of blood from the ventricles into the pulmonary artery and aorta
systolic click definition
abnormal systolic sound created by the opening of a calcified aortic or pulmonic valve duing ventricular contraction
telemetry definition
process of continuous electrocardiographic monitoring by transmission of radio waves
Layers of the heart?
Endocardium (inner) -> Myocardium -> Epicardium
What is the pericardium?
A thin, fibrous sac that the heart is encased in
What is the diastole phase?
All four chambers relax simultaneously, which allow the ventricles to fill in preparation for contaction
What is the systole phase?
Refers to the events in the heart during contraction of the atric and ventricles. Artrial systole first, then ventricular systole
What are the SA and AV node composed of?
Nodal cells
Heart rate is determined by?
The myocardial cells with the fastest inherent firing rate. Under normal circumatances, the SA node has the highest rate
Branches of the parasympathetic nervous system travel to the SA node by
the vagus nerve
Stimulation of the vagus nerve does what to the heart
slows the heart rate
sympathetic nervous system increases heart rate by
inervation of the beta-1 receptor sites located within the SA node
Stroke volume is determined by what three factors
Preload, afterload, and contractility
Preload is decreased by
Diuresis
Denodilating agents
Excessive loss of blood
Dehydration
Preload is increased by
increasing the reutrn of circulating blood volume to the ventricles
CAD development for men adn women
CAD development occurs around 10 years later in women , due to the female hormone estrogen
The three major effects of estrogen are
- An increase in HDL that transports cholesterol out of arteries
- Reduction in LDL that deposits cholesterol in the artery
- Dilation of the blood vessels, which enhance blood flow to the heart
What does an ED nurse due for a patient that arrives with acute coronary syndrome (ACS)
Performs rapid and focused assesment. Diagnosis and treatment must be started within minutes
Age Related Changes: History and Physical Findings of Atria
Irregular heart rhythm from atrial dysrhythmias
Age Related Changes: History and Physical Findings of Left Ventricle
Fatigue, Decreased exercise tolernce
S&S of heart failure
Age Related Changes: History and Physical Findings of Valves
Murmurs may be present
Age Related Changes: History and Physical Findings of Conduction System
Bradycardia
Heart Block
ECG changes
Age Related Changes: History and Physical Findings of Sympathetic nervous system
Fatigue
Diminished exercise tolerence
Decreased ability to respond to stress
Age Related Changes: History and Physical Findings of Aorta and arteries
Progressive increase in systolic BP
Widening pulse pressure
Age Related Changes: History and Physical Findings of Baroreceptor response
Postural BP changes and reports of feeling dizze, fainting when moving from lying to sitting
The signs and symptoms experienced by people with CVD are related to
dysrhythmias and conduction problems; structural, infectious, and inflammatory disorders of the heart
Most common S&S of CVD
Chest pain and discomfort
Pain or discomfort in other areas
Shortness of breath or dyspnea
peripheral edema, weight gain, abdominal distenion
Palpitations
Unusual Fatigue
How does a nurse differentiate among the causes of chest pain?
Nurse asks pt to identify the quantity, location, and quality of pain
Asses for radiation of the pain to other areas of the body and determines if associated S&S are connected.
The location of chest symptoms is not well correlated with
the cause of pain
Dietary modifications, exercise, weight loss, and careful monitoring are important strategies for managing what three major cardiovascular risk factors?
Hyperlipidemia,
Hypertension
Diabetes
What diets are commonly prescribed?
Diets that restrict sodium, fat, cholesterol, or calories
Angina Pectoris definition
Uncomfortable pressure, squeezing, or fullness in substernal chest area. Can radiate acros chest ot the medial aspect.
Angina Pectoris duration
5-15 minutes
Angina Pectoris can radiate across
chest to the medial aspect of one or both arms and hands, jaw, shoulders, upper back, or epigastrium.
Numbness, tingling, or aching
Angina Pectoris Percipitating Events
Physical exertion, emotional upset, eating large meal, or exposure to extremes in temperature
Angina Pectoris Alleviating Factors
Rest, Nitroglycerin, and Oxygen
ACS Character
Same as angina pectoris.
Pain or discomfort from ild to severe
Associated with shortness of breath, diaphoresis, palpitations, unusual fatigue
ACS Duration
> 15 minutes
ACS Precipitating Events
Emotional upset or unusual physical exertion occurs within 24 hours of symptom onset.
ACS Alleviating Factors
Morphine
Reperfusion of coronary artery with thrombolytic agent or percutaneous coronary intervention
Pericarditis Character
Sharp, sever substernal or epigastric pain
Can radiate to neck, arms, and back
Pericarditis S&S
Fever
Malaise
Dyspnea
Cough
Nausea
Dizziness
Palpitations
Pericarditis Duration
Intermittent
Pericarditis Precipitating Events
Sudden onset
Pain increases with inspiration, swallowing, coughing, and rotation of trunk
Pericarditis Alleviating Factors
Siting upright,
Analgesia
Anti-inflammatory medications
Pulmonary Disorders (Pneumonia Pulmonary Embolism) Character
Shartp, severe substernal or epigastric pain arising from inferior portion of pleura.
Patient may be able to localize the pain
Pulmonary Disorders (Pneumonia Pulmonary Embolism) Duration
> 30 minutes
Pulmonary Disorders (Pneumonia Pulmonary Embolism) Precipitating Events
Follows infectious process
Pleuritis pain increases with inspiration, coughing, movement, and supine positioning
Occurs in conjuction with community or HAI’s or VTE
Pulmonary Disorders (Pneumonia Pulmonary Embolism) Alleviating Factors
Treatment of underlying cause
Anxiety and Panic Disorders Character
Pain described as stabbing to dull ache
Associted with diaphoresis, palpitations, shortness of nbreath, tingling of hands or mouth
Anxiety and Panic Disorders Duration
Peaks in 10 minutes
Anxiety and Panic Disorders Precipitating Events
Can occur at any time including during sleep
Can be associated with a specific trigger
Anxiety and Panic Disorders Aleviating Factors
Removal of stimulus, relaxation, medications to treat anxiety or underlying disorder
Esophageal Disorders (hiatal hernia, reflux esophagitis or spasm) Character
Substernal pain described as sharp, burning, or heavy
OFten mimics angina
Can radiate to neck, arm, or shoulders
Esophageal Disorders (hiatal hernia, reflux esophagitis or spasm) Duration
5-60 minutes
Esophageal Disorders (hiatal hernia, reflux esophagitis or spasm) Precipitating Events
Recumbency, cold liquids, exercise
Esophageal Disorders (hiatal hernia, reflux esophagitis or spasm) Alleviating Factors
Food or actacid
Nitroglycerin
Musculoskeletal Disorders (Costochondritis) Character
Sharp or stabbing pain localized in anterior chest
Most often unilateral
Can radiate across chest to epigastrium or back
Musculoskeletal Disorders (Costochondritis) Duration
Hours to days
Musculoskeletal Disorders (Costochondritis) Precipitating Events
Most often follows respiratory tract infections with sidnificant coughing
Exacerbated by deep inspiration, coughing, sneezing, and movement
Musculoskeletal Disorders (Costochondritis) Alleviating Factors
Rest, ice, or heat
Analgesic or anti-inflammatory medications
Nocturia is comon in patients with
HF
Because many cardiac medications can cause GI side effects or bleeding, the nurse asks about
bloating, diarrhea, constipation, stomach upset, heartburn, loss of appetite, nausea, and vomiting
Screening for bloody urine or stools should be done for patients taking
platelet-inhibiting medicatons such as aspirin and clopidogrel
Platelet aggregation inhibitors
Anticoagulants
Oral Anticoagulantns
Activity-induced angina or shortness of breath may indicate
CAD.
Occur when myocardialischemia is present, due to an inadequate arterial blood supply
Patients with worsening HF often experience orthopnea, which is
a term used to indicate the need to sit upright or stand to avoid feeling short of breath
Patients with orthopne will report that they need to
sleep upright in a chair, or add extra pillows to their bed
What is Paroxysmal Noctural Dyspnea is
sudden awakening with shortness of breath.
Caused by the reabsorption of fluid from dependent areas of the body back into the circulatory system within hours of lying in bed
This increases preload and places increased demand o the heart of patients with HF causing pulmonary congestion
What is sleep-disordered breathing (SDB)?
This is an abnormal respiratory pattern due to intermittent episodes of upper airway obstruction causing apnea and hypopnea
This causes intermittent hypoxemia, sympathetic nervous system activation, and increased intrathoracic pressure
Untreated SDB has been linked to
CAD, hypertension, HF and dysrhythmias
SDB is treated by
use of continuous positive airway pressure (CPAP) and mandibular advancment devices (MAD).
THey maintain an open airway during sleep, prevent hypoxemia
Patients with CVD are being managed with complex medical regimens and sophisticated technology such as
implantable cardioverter defibrillators (ICDs) and left ventricular assist devices
High levels of anxiety are associated with
an increased incidience of CAD and in-hospital complication rates after MI
Patients with CAD and HF should be assesed for what mental issue?
Depression
Patients who have depresion exhibit common signs and symptoms such as
feelings of worthlessness or guilt, problems falling asleep, or staying asleep, having little pleasure, difficulty concentrating, and recent changes in appetite and weight
Stres initiates a variety of responses, such as
increased levels of catecholamines and cortisol and has been strongly linked to cardiovascular events
During a physical assessment, the nurse evaluates teh cardiovascular system for any deviations from normal with regard to the following
the heart as a pump
Atrial and ventricular filling volumes nad pressures
Cardiac Output
Compensatory mechanisms
With general appearance, patients are observed for what signs
Signs of distress, which include pain or discomfort, shortness of breath, or anxiety
For assessment of the skin and extremities, what are the 6 P’s
Pain
Pallor
Pulselessness
Paresthesia
Coldness
Paralysis
What sites of the body may be used for catheter insertion?
Major blood vessels of the arms and legs
What medicine must be used with catheter insertion?
During these procedures, systemic anticoagulation with heparin is necessary
What is peripheral edema?
Edema of the feet, ankles, or legs
What is pulse pressure?
The diffference between the systolic and the diastolic pressures
A reflection of stroke volume, ejection velocity, and systemic vascular resistance
Normally 30-40 mm Hg, indicated how well the patient maintains cardiac output
Posturual hypotension in patients with CVD is most often due to
a significant reduction in preload, which compromises cardiac output.
Reduced preload from postural hypotension is reflective of
intravascular volume depletion and is caused by dehydration from overdiuresis, bleeding (due to antiplatelet or anticoagulant medications) or medications that dilate the blood vessels
What is the pulse like in a patient with stenosis of the aortic valve
The valve opening is narrowed, reducing amount of blood ejected.
Pulse pressure is narrow, and pulse feels feeble