Cardiac Flashcards

1
Q

a nurse is caring for a client who has multiple long bone fx r/t MVC 24 hours ago. The client tells the nurse he is SOB and experiencing chest pain . the nurse should assess the client further for which of the following potential complications?

fat embolism syndrome
compartment syndrome
venous thromboembolism
hypovolemic shock

A

fat embolsim syndrome

additional manifestations: altered MS, tachypnea, tachycardia

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2
Q

a nurse is giving a presentation abt preventing DVT. which of the following should the nurse include as a risk factor for this disorder? SATA

Oral contraceptive use
HTN
High calcium intake
immobility
BMI of 20

A

oral contraceptive use and immobility

trauma = risk factor

obesity = risk factor

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3
Q

a nurse in a clinic is caring for a pt who has recently begun taking warfarin. the nurse is reviewing potential drug and food interaction risks and should instruct the pt to avoid which of the following?

cantaloupe
green beans
white beans
cabbage

A

cabbage

rich in vitamin K

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4
Q

a nurse caring for a male pt who has PVD, is taking dietary supplements, and has a new prescription for warfarin. the nurse should instruct the client to stop which of the following supplements prior to starting the warfarin? SATA

flaxseed oil
glucosamine
black cohosh
gingko balboa
saw palmetto

A

saw palmetto
gucosamine
gingko balboa

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5
Q

what is saw palmetto?

A

used to relieve symptoms associated w/ BPH and has an antiplatelet effect

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6
Q

flaxseed oil is used for

A

source of omega-3 fatty acids used to promote CV health

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7
Q

Glucosamine is used for

A

prevent osteoarthritis and may increase risk of bleeding

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8
Q

what is black cohosh used for

A

sleep disturbances and depression

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9
Q

gingko biloba is used for

A

used to increase pain-free walking in clients with PVD and may suppress coagulation. should not be taken with warfarin

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10
Q

a nurse is caring for a client 8 hr post-op following a TKR. which of the following actions should the nurse take?

-apply cool compresses to the affected limb
-place a pillow under the affected limb
-promote bed rest for 5-7 days
-encourge increased fluid intake

A

encourage increased fluid intake

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11
Q

a nurse is providing discharge instructions to a client who has developed DVT postoperatively and is prescribed anticoagulant therapy. Which of the following instructions should the nurse include?

-wearing loose, non-constricting stockings
-applying cool compresses to her legs
-flexing her knees and feet frequently
-taking an NSAID tablet daily

A

flexing her knees and feet frequently

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12
Q

a nurse is providing teaching to a client about interventions to reduce the risk of developing CV disease. which of the following statments by pt should indicate to the nurse the need for further teaching?

“Exercising regularly will increase HDL cholesterol levels.”
“a weight loss program can decrease my LDL cholesterol level.”
“adding foods containing omega-3 fatty acids to my diet can lower my risk.”
“increasing my intake of foods contaning trans-fatty acids can lower my risk.”

A

“increasing my intake of foods containing trans-fatty acids can lower my risk.”

causes an increase in LDL, which increases the risk of CV disease

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13
Q

a nurse caring for a pt who reports an area of redness, warmth, tenderness, and pain in the right calf. the nurse anticipates which of the following orders when notifying the provider of this finding?
-obtain a venous duplex ultrasound
-monitor Homan’s sign
apply cold therapy to the affected leg
-obtain impedance plethysmography

A

obtain a venous duplex ultrasound

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14
Q

a nurse is caring for a client who came to the ED reporting chest pain. The provider suspects an MI. while waiting for the troponin levels report, the client asks what the blood test will show. which of the following explanations should the nurse provide the client?
-troponin is an enzyme that indicates damage to brain, heart, and skeletal muscles
-troponin is a lipid whose levels reflect the risk of CAD
-troponin is a heart muscle proteiin that appears in the bloodstream when there is damaage to the heart
-troponin is a protein that helps transport oxygen throughout the body

A

troponin is a heart muscle protein that appears in the bloodstream when there is damage to the heart

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15
Q

a nurse is caring for a client who is post-op following vascular surgery. which of the following signs should indicate to the nurse that the client has developed a thrombosus?
-positive Kernig’s sign
- positive Homan’s sign
- Dull, aching calf pain
- soft, palpable calf muscle

A

dull, aching calf pain

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16
Q

a nurse is on a med surge unit is caring for four clients who are 24-36 hr postop. which of the following surgical procedures places the client at risk for DVT?
-myringotomy
-laprascopic appendectomy
-hip arthroplasty
-cataract extraction

A

hip arthroplasty

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17
Q

a nurse is interpreting a client’s ECG strip. which of the following components of the ECG should the nurse examine to determine the time it takes for ventricular depolarization and repolarization?
-PR interval
-QT interval
-ST segment
-QRS complex

A

QT interval

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18
Q

a nurse in the emergancy room is caring for a pt who reports chest pressure and SOB. which of the following laboratory tests should the nurse anticipate the provider to prescribe?
-troponin 1
-lipase
-B-type natriuretic peptide (BNP0
-aspartate aminotransferase (AST)

A

troponin 1

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19
Q

a nurse is caring for a client who is postoperative and is at risk for developing venous thromboembolism (VTE). the nurse should instruct the client to avoid which of the following unsafe actions?
-elevating her feet
-massaging her legs
-flexing her ankles
-ambulaitng soon after surgery

A

massaging her legs

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20
Q

a nurse is monitoring a client who is on telemetry. which of the following findings on the ECG strip should the nurse recognize as normal sinus rhythm>
-The p wave falls before the QRS complex
-the t wave is in the inverted position
-the P-R interval measures 0.22 seconds
- the QRS duration is 0.20 seconds

A

The P wave falls before the QRS complex

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21
Q

a nurse is interpreting the ECG strip of a client who has bradycardia. which of the following cardiac components should the nurse identify as the role of the P wave?
-ventricular depolarization
-slow repolarization of ventricualr perkinje fibers
-atrial depolarization
-early ventricular repolarization

A

atrial depolarization

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22
Q

What is troponin?

A

Protein present from injury / damage to cardiac muscle . Appears with conditions such as MI

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23
Q

Cholesterol

A

Levels of fat in your blood, higher cholesterol=higher risk for CV disease(CAD, ischemia, MI)
Normal=<200mg/dL

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24
Q

LDL

A

“Bad cholesterol”; correlated with CAD; normal= <130mg/dL
MI, stroke, death

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25
Q

HDL

A

“Good cholesterol”
Protects against heart disease
Men:>45mg/dL
Women: >55mg/dL

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26
Q

Triglycerides

A

DM2 or pre-diabetes if present in high numbers

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27
Q

Electrical flow of the heart

A

SA node->Bachmann’s bundle and intermodal tracts->R and L atria and AV node->Bundle of His->R and L bundle-> L posterior fascicle and L anterior fascicle-> Perkins fibers

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28
Q

A p-wave represents…

A

Atrial depolarization (contraction)

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29
Q

QRS complex represents…

A

Ventricular depolarization (contraction) and atrial repolarization (simultaneous)

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30
Q

T-wave represents…

A

Ventricular repolarization (relaxation)

31
Q

PR interval represents…

A

Time it takes for impulse to travel from SA node to AV node

32
Q

QT interval represents…

A

Measurement of time it takes for ventricular depolarization

33
Q

Risk factors for thrombus formation

A

Obesity, pregnancy, smoking, immobility, surgery

34
Q

S/S DVT

A

Warm, red, swollen, painful in calf foot or leg

35
Q

S/S PE

A

Chest pain while breathing, leadheadedness, SOB, cough, decreased O2 sats, decreased/diminished breath sounds in affected area

36
Q

What is the preferred diagnostic method to test for DVT?

A

D-dimer blood test

37
Q

What is a D-Dimer?

A

Type of protein that is present with blood clots

38
Q

define cardiac output

A

Amt of blood ejected from LV each min

39
Q

Stroke volume…

A

Amt of blood ejected by LV during each contraction

40
Q

how many large boxes on an EKG strip= 6 seconds?

A

30

41
Q

Pr interval

A

0.12-0.2 sec

42
Q

QRS complex

A

0.6-1 seconds less than .10 sec

43
Q

QT interval

A

<0.44 seconds

44
Q

One small box on an EKG is…

A

0.04 seconds

45
Q

One large box is

A

0.2 seconds (5 small boxes together)

46
Q

Normal sinus rhythm

A

Impulse initiated by SA node
Regular rhythm (same distance)
Rate 60-100bpm
Normal P wave in lead 2
P wave before each QRS complex
Normal PR, QRS, QT intervals

47
Q

Sinus bradycardia

A

Impulse initiated by SA node
Sinus rhythm with rate less than 60bpm
P wave before each QRS

48
Q

Causes for sinus bradycardia

A

Vagal, drugs, ischemia, disease of the nodes, ICP,hypoxemia, and athletes(normal), valsalva maneuver stimulates vagal nerve

49
Q

Tx for sinus bradycardia

A

Treat underlying cause with medications i.e. atropine or IVF or pacing- transcutaneous/transvenous

50
Q

Possible s/s of sinus bradycardia

A

Asymptomatic or confusion, SOB, chest pain, diaphoresis, syncope, lightheaded, hypotension

51
Q

Sinus tachycardia

A

Sinus rhythm with rate 100-150bpm
Normal P wave before QRS

52
Q

Causes of sinus tachycardia

A

Hyperthyroidism, hypovolemia (compensatory), HF, anemia, exercise,fever, sympathetic response to fear/pain/anxiety , medications , substances (atropine, epi. Nicotine , caffeine)

53
Q

Why is there a slight delay in the AV node?

A

Ensures the atria contract before the ventricles contract

54
Q

Determining HR on EKG strip

A

Count 30 boxes across (6 sec strip) or find three tick marks(3 sec between tic marks)
-count QRS complexes and multiply by 10

55
Q

Determine regularity on EKG

A

Rhythm measured by R-R intervals… if measurement the same the rhythm is normal, if not the same then it is irregular

56
Q

Virchow’s Triad

A

Hypercoagulable state
Stasis of Bloodflow
Endothelial Injury

57
Q

What is within hypercoagulable state

A

Malignancy
Congenital coagulation defect
Thrombophilia
Pregnancy
Oral contraceptives
Inflammatory bowel disease

58
Q

What is within the stasis of bloodflow?

A

Immobility
Atrial fibrillation
Venous insufficiency
Venous obstruction
HF

59
Q

What is within endothelial I injury?

A

Surgery- Hip, knee, prostate
Trauma
Atherosclerosis
Smoking
Catheter

60
Q

What is a Padua prediction score

A

Scores how at risk a pt is for developing a VTE; high risk= score over 4

61
Q

Homan sign

A

Positive when pain with dorsi flexion

62
Q

Venus duplex ultrasound

A

Gold standard for Dx a DVT

63
Q

tx for DVT

A

Mobility exercises, anticoagulant therapy, exercise, preventative measures
Meds- enoxaparin(LMWH), unfractionated hpearin (IV heparin), warfarin, Novel oral anticoagulants (NOAC)m surgical management

64
Q

LMWH

A

Enoxaparin, SQ, prophylaxis of DVT, prohibits thrombin formation, may go home on this; dosage based on weight, don’t adjust dosage like heparin

65
Q

Unfractionated heparin

A

IV heparin, prevents clot from getting bigger or any future clots, over time body slowly absorbs existing clots
Need baseline PT and aPTT, CBC, INR, PLT count
Given as bolus IV followed by continuous infusion with a PUMP, high risk drug
aPTT used to dose the drug
Protamine sulfate=antidote

66
Q

When is an aPTT monitored for IV heparin?

A

Initial baseline, 6 hours after initial start, 6 hours after drip is started, and 6 hours after any dose change

67
Q

if aPTT is low…

A

Inc heparindose dose and may give bolus

68
Q

If aPTT is high

A

Decrease heparin dose

69
Q

Heparin antidote

A

Protamine sulfate

70
Q

Warfarin

A

Works in the liver to inhibit synthesis of clotting factors, takes 3-4 days to be therapeutic
Measure INR level 1.5-2 for prevention, if PE, 3.5-4

71
Q

Warfarin antidote

A

Vitamin K

72
Q

Novel oral anticoagulants

A

Fewer drug interactions with fixed dosing without monitoring labs

73
Q

What are the NOAC drugs?

A

Dabigatran, Rivaroxiban, apixaban, and edoxaban

74
Q

DVT surgical management

A

Thrombectomy
Catheter aspiration- suction removes clot
Mechanical- clot broken into small pieces and removed
Inferior vena cava filters-catches and collect emboli before progressing to the lungs