Cardiovascular System (Exam X) Flashcards
What is the purpose of the cardiovascular system?
To perfuse the organs and tissues with oxygenated blood
What three protective layers make up the pericardial sac?
- Fibrous pericardium
- Parietal pericardium
- Visceral pericardium (Epicardium)
In order, list the structures that blood flows through in the heart.
Inferior/Superior Vena Cava Right Atrium Tricuspid Valve Right Ventricle Pulmonary Valve Pulmonary Artery Lungs Pulmonary Vein Left Atrium Mitral Valve Left Ventricle Aortic Valve Aorta Body
Name the cardiac layers.
- Epicardium
- Myocardium
- Endocardium
What does the endocardium prevent?
Abnormal clotting
What is the coronary sinus?
Collection of veins that collects blood from the myocardium
What are the two classes of cardiac valves?
- Atrioventricular valves (AV Valves)
- Semilunar Valves
What are the two atrioventricular (AV) valves?
HINT: Always “tri” to do the “right” thing
- Tricuspid valve (Right AV valve)
- Bicuspid valve (Left AV valve)
What are the two semilunar valves?
- Pulmonary valve
- Aortic valve
When blood is flowing from the atria to the ventricles, what valves are open? What valves are close?
- Atrioventricular valves are open (tricuspid and bicuspid)
- Semilunar valves are closed (pulmonic and aortic)
When blood is flowing from the ventricles to the lungs and body, what valves are open? What valves are closed?
- Semilunar valves are open (pulmonic and aortic)
- Atrioventricular valves are closed (tricuspid and bicuspid)
Define systole.
- Chambers are contracting (squeezing)
- Blood is pushed from the chambers out to body
- Also known as period of ejection
Define diastole.
- Chambers are relaxing
- Blood is filling into the chambers
Name the parts of the Cardiac Conduction Pathway in order.
- Sinoatrial (SA) Node
- Atrioventricular (AV) Node
- Bundle of His
- Right and Left Bundle Branches
- Purkinje Fibers
What is the gold standard diagnostic test for detecting cardiac dysrhythmias?
Electrocardiogram (ECG)
What does an electrocardiogram measure?
Length of time it takes for electrical impulses to pass through the heart
Describe changes within the vascular system that are common of an aging individual.
- Increase in systolic blood pressure
- Increased risk of bundle branch block
- Increase in PR interval
- Increase in QRS duration
- Orthostatic hypertension
- Dysrhythmias
What is the equation used to calculate Mean Arterial Pressure (MAP)?
(2DiastolicPressure + SystolicPressure) / 3
Calculate the mean arterial pressure (MAP) for the following blood pressure reading: 102/38
(2(38) + 102) / 3 = 59.33 = 59
Calculate the mean arterial pressure (MAP) for the following blood pressure reading: 155/98
(2(98) + 155) / 3 = 117
Calculate the mean arterial pressure (MAP) for the following blood pressure reading: 76/28
(2(28) + 76) / 3 = 44
Calculate the mean arterial pressure (MAP) for the following blood pressure reading: 120/80
(2(80) +120) / 3 = 93.33 = 93
Define ejection fraction.
Total amount of blood the left ventricle pumps out with each contraction
T/F: Jugular vein distention is a common, but not a clinically significant finding, in a patient lying flat.
True
The nurse should assess for jugular vein distention with the head of the patient’s bed elevated to what degree or position ?
Semi- or high-Folwers position
Where should the nurse palpate the point of maximal impulse?
- Left midclavicular line
- Fifth intercostal space
If the point of maximal impulse if felt outside of the fifth intercostal space, what might this indicate?
- Cardiac enlargement
- Left ventricular hypertrophy
Describe a bruit.
- Turbulent blood flow in an artery
- Humming sound
What laboratory value is indicative of heart failure?
B-type Natriuretic Peptide (BNP)
What laboratory value is highly indicative of myocardial injury or a myocardial infarction?
Troponin
What type of education should the nurse provide to a patient who is discharged home with Holter monitoring?
- Loose fitting clothing
- Sponge baths only
- Record a diary of daily activities
The nurse administering a stress test on a patient knows the test should be discontinued when the electrocardiogram (ECG) shows what?
- T wave inversion is seen on ECG
- ST elevation is seen on ECG
An MRI would be contraindicated in a patient who has what?
Pacemaker
What are the signs and symptoms of hypertension?
HINT: The silent killer
-Often no s/sx
- Fatigue
- Dizziness
- Palpitations
- Angina
- Dyspnea
- Headaches
What is considered a more severe sign of hypertension or hypertensive crisis?
Headache
T/F: Hypertension is generally asymptomatic until target organ damage occurs.
True
What blood pressure ranges fall under “prehypertension”?
- Systolic: 120-139
- Diastolic: 80-89
What blood pressure ranges fall under “stage one hypertension”?
- Systolic: 140-159
- Diastolic: 90-99
What blood pressure ranges fall under “stage two hypertension”?
- Systolic: >160
- Diastolic: >100
The nurse determines that the patient has stage 2 hypertension when the patient’s average blood pressure is: (SATA)
A. 150/96 mm Hg. B. 155/88 mm Hg. C. 172/92 mm Hg. D. 160/110 mm Hg. E. 182/106 mm Hg.
C, D, E
What is the treatment aimed at for a patient with secondary hypertension?
- Removing cause
- Treat cause
List the risk factors for developing primary hypertension.
- Male
- Age 64 and older
- African American
- Alcohol/tobacco use
- Diabetes mellitus
- Family history
While performing blood pressure screening at a health fair, the nurse counsels which person as having the greatest risk for developing hypertension?
A. A 56-year-old man whose father died at age 62 from a stroke
B. A 30-year-old female advertising agent who is unmarried and lives alone
C. A 68-year-old man who uses herbal remedies to treat his enlarged prostate gland
D. A 43-year-old man who travels extensively with his job and exercises only on weekends
A. A 56-year-old man whose father died at age 62 from a stroke
What laboratory or diagnostic studies should the nurse monitor in a patient with newly diagnosed hypertension to assess possible target organ damage?
- BUN
- Creatinine
What education must a patient be provided with when starting on antihypertensive medication?
- Medication must be continued even if s/s are not present
- Get up slowly
- Change positions slowly
- Don’t abruptly discontinue medications
- Always ask if the patient is taking their medication and if they are taking it as directed
The nurse should educate a patient with potential white coat hypertension to do what?
Monitor and record blood pressure at home
A patient’s BP has not responded consistently to prescribed drugs for hypertension. The first cause of this lack of responsiveness the nurse should explore is:
A. Progressive target organ damage
B. The possibility of drug interactions
C. The patient not adhering to therapy
D. The patient’s possible use of recreational drugs
C. The patient not adhering to therapy
Which beta blockers are considered non-selective and increase the patients risk for bronchospasms?
- Propranolol
- Nadolol
- Labetalol
- Carvedilol
T/F: Angioedema is considered a normal side effect of ACE Inhibitors.
- False
- The patient should be instructed to notify the nurse of any lip or facial swelling
What side effects should be monitored with ACE Inhibitors?
- Cough
- Angioedema
- Orthostatic hypotension
What is considered the first-line drug therapy for a geriatric patient newly diagnosed with hypertension?
Thiazide diuretics
An older adult diagnosed with hypertension should be educated on avoiding what drug class, as they can prevent adequate blood pressure control?
NSAID’s
A patient who displays what type of symptoms is most at risk for developing a hypertensive crisis?
Stroke-like symptoms