QUIZ 4: CHAPTER 41: NURSING CARE OF A FAMILY WHEN A CHILD HAS A CARDIOVASCULAR DISORDER Flashcards
volume of blood in the ventricles at the end of diastole (the point just before contraction).
Preload
to the resistance against which the ventricles must pump.
Afterload
the ability of the ventricles to stretch, refers to the force of contraction generated by the myocardial muscle.
Contractility
DIAGNOSTIC TEST
Written record of the electrical voltages generated by the contracting heart.
Provides information about heart rate, rhythm, state of the myocardium, presence or absence of hypertrophy (thickening of the heart walls), ischemia or necrosis due to inadequate cardiac circulation, and abnormalities of conduction.
Provide information about the presence or effect of various drugs and electrolyte imbalances
ELECTROCARDIOGRAM
Furnish an accurate picture of the. heart size and the contour and size of the heart chambers
Reveal fluid collecting in the lungs or pulmonary artery from cardiac failure
Use to confirm the placement of pacemaker leads
RADIOGRAPHY
High frequency sound waves directed toward the heart, are used to locate and study the movement and dimensions of cardiac structures, such as the size of chambers, thickness of walls, relationship of major vessels to chambers, and the thickness, motion, and pressure gradients of valves
ECHOCARDIOGRAPHY
Ultrasound cardiography
Diagram of heart sounds translated into electrical energy by a microphone placed on the child’s chest and then recorded as a diagrammatic representation of heart sounds.
Measures the timing of heart sounds that occur too quickly or at too high or too low a sound frequency for the human ear to detect by direct auscultation.
PHONOCARDIOGRAPHY
Using treadmill walking to demonstrate that the pulmonary circulation can increase to meet the increased respiratory demands of exercise may be performed with children, although these tests are not used as extensively with children as they are with adults
EXERCISE TESTING
Children with heart disease usually undergo a number of blood tests to support the diagnosis of heart disease or to rule out anemia or clotting disorders
LABORATORY TESTS
- Parents know that children with streptococcal infections from otitis media, streptococcal pharyngitis, and impetigo should receive adequate antibiotic therapy is essential for disease prevention.
Rheumatic fever
- high intake of sodium (such as table salt), lack of exercise, and obesity increase the chances that a susceptible child will develop the disorder by late childhood.
Hypertension
- Fat intake not to be restricted in infants because they need fat and the calories it provides for brain growth. School-age children and adolescents, however, should reduce their fat intake to 30% of total calories.
Hyperlipidemia
Procedure in which a small radiopaque catheter is passed through a major vein in the arm, leg, or neck into the heart to secure blood samples or inject dye, helps to evaluate cardiac function.
Interventional
THE CHILD HAVING CARDIAC CATHETERIZATION
(also called cardiac cath or coronary angiogram) is a procedure that allows your doctor to “see” how well your heart is functioning
Cardiac catheterization
Chief cure for congenital heart disease
Open-heart surgery
use of cardiopulmonary bypass or extracorporeal membrane oxygenation
Intra-catheter Surgery
Preoperative Care
Obtain vital signs (blood pressure, temperature, pulse, and respirations) to establish baseline
Record height and weight
Digoxin is withheld 24 hours before surgery because cardiac
surgery may cause arrhythmias in the presence of cardiac
glycosides
THE CHILD SCHEDULED FOR CARDIAC SURGERY
Hemorrhage - identify early signs of bleeding
Shock From Hypovolemia/ Cardiac Tamponade
Hypotension, oliguria, acidosis, and cyanosis.
Plasma volume expanders, continued mechanical ventilation or return to surgery
Heart Block Or Arrythmias
COMPLICATIONS OF CARDIAC SURGERY
Synthetic material (prosthetic) or human donors(homograft’s) are often used.
is technically more complicated in children than adults
THE CHILD WITH AN ARTIFICIAL VALVE REPLACEMENT
Candidates:
Hypoplastic left ventricle
Extensive cardiomyopathy from any cause Maintained on extracorporeal membrane oxygenation (ECMO) or a trial ventricular assist device while waiting for surgery.
THE CHILD UNDERGOING CARDIAC TRANSPLANTATION
Atrial Septal Defect
Ventricular Septal Defect
Atrioventricular
Canal Defect
Patent Ductus Arteriosus
Increased Pulmonary Blood Flow
Coarctation of the Aorta
Aortic Stenosis
Pulmonary Stenosis
Obstructive Disorders