Cardio Flashcards
Data collection:
What’s up?
W-where is the pain? H-how does it feel? A-aggravating and alleviating factors T-timing S-severity
U-useful data for associated symptoms
P-Perception by the patient of the problem
Chest x-ray film
Definition: anterior – posterior and left lateral views of chest, noninvasive
Significance of abnormal findings: heart enlargement, calcifications, fluid around the heart
Nursing managementColin asked emails if they are pregnant. Remove metal items. Teaching: no discomfort.
Computed tomography scan (CT)
Definition: evaluate heart, structures, Noninvasive
Significance of abnormal findings: plaque or calcification indicates atherosclerosis
Nursing management: kidney function checked if contrast is used. If renal insufficiency, Prophylaxis such as N– acetylcysteine (Mucomyst) and IV hydration with 0.45% NaCl hydration or a bicarbonate infusionCan be given to protect kidneys
Cardiac magnetic resonance imaging (MRI) / angiography (MRA)
Definition: provides 3-D image of heart. Contrast given for MRA to visualize arteries. Non-invasive.
Significance of abnormal findings: cardiac abnormalities
Nursing management: ask about implants, non-MRI safe pacemaker, metallic items, and claustrophobia. Give anti-anxiety medication as ordered before MRI. Assess allergies for contrast agent. Teaching: must lie still in cylinder with loud, pounding sounds. Can talk or listen to music.
Electrocardiogram ( ECG)
Definition: electrodes on skin carry electrical activity of heart from different views, non-invasive
Significance of abnormal findings: dysrhythmias, enlarged heart chamber size, myocardial ischemia or infarction, electrolyte imbalances
Nursing management: teaching: no discomfort, explain procedure
Holter monitor
Definition: recording of ECG for up to 24 hours to match abnormalities with symptoms recorded in patient’s diary. Noninvasive.
Significance of abnormal findings: dysrhythmias, infrequent myocardial ischemia
Nursing management: apply electrodes and leads. Teaching: keep accurate diary; push event button for symptoms, no showers or baths, return visit
Event recorder
Definition: Worn longer time periods and can record three cardiac events, non-invasive
Significance of abnormal findings: infrequent cardiac events
Nursing management: Teaching: push event button for symptomatic event, can bathe
Echocardiogram
Definition: sound waves bounce off heart to produce heart images and show blood flow, noninvasive
Significance of abnormal findings: heart enlargement, coronary artery disease, valvular abnormalities, thick-ended cardiac walls or septum, pericardial effusion
Nursing management: may be done at bedside, patient lives on the left side. Teaching: no discomfort, gel applied
Transesophageal echocardiogram
Definition: probe with transducer on the end inserted into esophagus. Non-invasive.
Significance of abnormal findings: The same as echocardiogram: heart enlargement, coronary artery disease, valvular abnormalities, thick-ended cardiac walls or septum, pericardial effusion
Nursing management: monitor vital signs and oxygen saturation. Check gag reflex before NPO status is discontinued. Suction continuously during procedure. Teaching: NPO six hours before test, sedation and local throat anesthetic given
Exercise stress echocardiogram
Definition: evaluates effects of exercise on heart and vascular circulation. Non-invasive.
Significance of abnormal findings: dysrhythmias, ischemia
Nursing management: monitor vital signs and ECG before, during, and after test until stable. Teaching: explain procedure, we’re walking shoes and comfortable clothes
Doppler ultrasound
Definition: sound waves bounce off moving blood producing recordings. Not invasive.
Significance of abnormal findings: decreased blood flow in peripheral vascular disease
Nursing management: teaching: explain procedure
CK – MB
Definition: Lab test (creatinine kinase myocardial band) heart muscle contains myocardial band isoenzyme. Normal: 0-7 international units/L
Significance of abnormal findings: rises with myocardial infarction in 6 hours and returned to baseline in 72 hours
Nursing management: same as creatinine kinase (CK). Avoid IM injections, and take baseline CK before inserting IVs to avoid elevating CK from muscle cell damage. Serial sampling is done (series).
Cardiac troponin I or T
Definition: lab test; cardiac cell protein. Normal: varies by lab; very low level.
Significance of abnormal findings: elevated levels, sensitive indicator of myocardial infarction. Levels elevated up to 7 days.
Nursing management: no special care.
Myoglobin
Definition: lab test; protein found in cardiac cells; 99% indicative of myocardial infarction. Normal: 0-85 ng/ml
Significance of abnormal findings; rises in 1 hour after MRI and peaks in 4-12 hours, so must be drawn within.
Nursing management: no special care.
Angiography
Definition: invasive; contrast agent injected into vessels to make them visible on x-ray’s. Coronary: coronary arteries be a cardiac catheter. Peripheral: Peripheral arteries or veins.
Significance of abnormal findings: assess vessel patency, injury, or aneurysm.
Nursing management:
Pre-care: informed consent. NPO 4-18 hours before test. Assess for allergies.
teaching: sedative and local anesthesia may be used; burning sensation from die; monitor continuously.
Post care: monitor vital signs, hemorrhage at the injection site, pulses.
Cardiac Catheterization
Definition: invasive; cath inserted into heart for data on oxygen saturation and chamber pressures. Contrast may be injected to visualize structures.
Significance of abnormal findings: cardiac disease.
Nursing management:
Pre-care: same as angiography, informed consent, NPO 4-18 hours before test, assess for allergies.
Sensory teaching: table is hard; cool cleansing solution used; sting felt from local anesthetic; hear monitor beeping; feel pressure of catheter insertion; dye is warm, burning feeling; headache; brief chest pain; hear camera; feel table move.
Post care: monitor vital signs, circulation, mobility, sensation, catheter insertion site For hemorrhage/hematoma every 15 minutes for one hour, then every 30- 1 hour. Apply pressure as needed, immobilize extremity for several hours as ordered.
Atherosclerosis
The deposition of lipids in the walls of arteries over a period of years. Build up of lipids can narrow artery lumens and stimulate clot formation. Decreased blood flow.
Ischemic
Restricted bloodflow
Pulse deficit
Apical pulse can be compared with the radial pulse rate to assess the equality. *If there are fewer radial beats than apical beats, a pulse deficit exist and should be reported to the HCP.
Bruit
When auscultating an abnormal vessel, a HUMMING is heard that is caused by turbulent bloodflow through the vessel.
Thrill
When the normal vessel is palpated, a tapping is felt. *In the abnormal vessel that has a bulging or narrowed wall, a VIBRATION is felt.
Clubbing
Clubbing of the nailbeds, occurs from oxygen deficiency over time.
Caused by congenital heart defects, or long-term tobacco use.
The distal end of the fingers and toes swell and appear club like.
Point of maximum impulse
In addition to palpating the arteries, the thorax can be palpated at the point of maximum impulse.
The point of maximum impulse is palpated by placing the right hand over the apex of the heart.
If palpable, a thrust is felt when the ventricle contracts. And enlarged heart may shift the point of maximum impulse to the left of the midclavicular line.
Poikilothermy
Blood warms the body.
*In the absence of sufficient arterial blood flow, the area becomes the temperature of the environment.
Homan’s sign
An assessment for venous thrombosis.
The foot is quickly dorsiflexed with the knee flexed. Calf or knee pain is noted.
This assessment should not be performed it a positive diagnosis of thrombosis has been made.
Murmur
Murmurs are caused by a narrowed valve opening or a valve that does not close tightly.
* A murmur is a prolonged SWISHING Sound that ranges in intensity from faint to very loud.
Pericardial friction rub
Occurs from inflammation of the pericardium. The intensity of a rub can range from faint to loud, intermittently or continuously, and loud enough to hear without a stethoscope.
* sounds like grating, scratchy, high-pitched, SAND PAPER rubbing together when the pericardial surfaces rub together during a heartbeat.
It is heard best to the left of the sternum using the diagram of the stethoscope
Hemodynamic monitoring
Definition: diagnoses and guides treatment with continuous readings compared to normal for Right atrial pressure; pulmonary artery (systolic/diastolic); pulmonary artery(Pressure wedge); cardiac output; SVO2.
Significance of abnormal findings: blood pressure, cardiac and pulmonary pressure abnormalities
Nursing management: informed consent signed. Continuous monitoring. Recording of readings and monitoring of insertion site for signs of infection.
Electrophysiological studies
Definition: assesses the heart’s electrical system, with electrodes inserted into the right side of the heart.
Significance of abnormal findings: dysrhythmias
Nursing management: consent obtained. Patient is NPO 6-8 hours before the test.
Hypomagnesemia
A low level of magnesium in the blood, can cause cardiac arrhythmias, hypertension, and tachycardia.
Many things can contribute to low magnesium levels, including diuretic therapy, digitalis, some anabiotics, diabetes mellitus, and MI.
Preload
Pressure stretching the ventricle of the heart from fluid return to the heart.
Sternotomy
Surgical procedure in which a vertical inline incision is made along the sternum, after which the sternum itself is divided or “Cracked”. Used for open-heart surgery.
Dysrhythmias
Abnormal, disordered, or disturbed cardiac rhythm.
Claudication
Severe pain in the calf muscle from in adequate blood supply.
Cardiac output
A measure of the pumping ability of the heart; amount of blood pumped by the heart per minute.
Diastolic blood pressure
The amount of pressure exerted on the walls of the arteries when the ventricles are at rest. This is the bottom number in a blood pressure reading.
Essential (Primary) hypertension
Chronic elevation of blood pressure resulting from an unknown cause.
Hypertension
Abnormally elevated blood pressure.
Hypertensive emergency
A systolic blood pressure above 180 mm Hg and a diastolic blood pressure above 120 to 130 mm Hg, and are complicated by risk for or progression of target organ dysfunction (examples include myocardial infarction, heart failure, and dissecting aortic aneurysm).
*Immediate treatment is needed.
Hypertrophy
An increase in the size of an organ or structure, or of the body, owing to grow rather than tumor formation.
The severity and duration of the increase in blood pressure determine the extent of the vascular changes causing organ damage. High blood pressure levels can increase the size of the left ventricle.
Peripheral vascular resistance (PVR)
The ability of the vessels to stretch.
Viscosity
THICKNESS of the blood.
Hypertensive urgency
Blood pressure is elevated as in hypertensive emergency but without progression of target organ dysfunction.
Normotensive
Normal blood pressure
Plaque
A deposit of fatty material on the lining of an artery.
Secondary hypertension
High blood pressure that is a symptom of a specific cause, such as a kidney abnormality.
Systolic blood pressure
Maximal pressure exerted on the arteries during contraction of the left ventricle of the heart. The top number of a blood pressure reading.
Regurgitation or Insufficiency
Backflow of blood. Forward blood flow is hindered if the valve is narrowed or stenosed and does not open completely. If the valve does not close completely, blood backs up.
Rheumatic fever
Occurs as an autoimmune reaction to an upper respiratory (sore throat) group A beta-hemolytic streptococci infection. 2 to 3 weeks after the streptococcal infection, Rheumatic fever occurs. Can happen at any age typically occurs between ages five and 15. This is a rare complication of strep throat in the United States.
Chorea
A nervous system condition marked by involuntary muscular twitching of the limbs or facial muscles. Can be brief, rapid, or uncontrolled movements. May be a sign or symptom of rheumatic heart disease from rheumatic fever.