Exam 3 - Hypertension & Heart Failure Flashcards
Through which veins is deoxygenated blood from the body returned to the heart ?
The superior and inferior vena cava
Where does deoxygenated blood get dumped after entering the superior and inferior vena cava’s ?
the right atrium
Once deoxygenated is dumped into the right atrium, where does it flow next ?
The Right ventricle
From the Right ventricle, where does the deoxygenated blood get pumped to next?
Into the pulmonary artery and out to the lungs to circulate and become oxygenated.
Once the deoxygenated blood in the lungs circulates and becomes oxygenated, that freshly oxygenated blood then enters from both lungs into where ?
Enters through the pulmonary veins into the Left atrium
From the left atrium, the newly oxygenated blood then flows to where next ?
Down into the left ventricle
From the left ventricle, the oxygenated blood gets pumped to where next ?
Gets pumped up and out through the aorta to the body
Where does oxygen exchange occur ?
Lungs !
What cardiac valve is located between the R atrium and R ventricle ?
Tricuspid valve
What cardiac valve is the last valve before blood enters into circulation ?
Aortic (semilunar) valve
What cardiac valve is located between the L atrium and L ventricle ?
Mitral valve
What are two major coronary arteries of the heart ?
- Right coronary artery
- Left coronary artery
Both the Right coronary artery and the left coronary artery branch off into what ?
Smaller descending arteries
What is the medical term for the Heart muscle ?
Myocardium
The myocardium has its own what ?
Blood supply/circulation
What supplies blood/circulation to the heart itself ?
The coronary arteries and veins
Blockage of what coronary artery can result in serious defects in cardiac conduction, because it supplies the bundle of hiss, AV node, etc.
R coronary artery
What is Systole defined as ?
Contraction of the myocardium
What is Diastole defined as ?
Relaxation of the myocardium
_______________ is the amount of blood pumped by each ventricle in 1 minute ?
Cardiac output
What is the equation for determining the Cardiac Output (CO) ?
CO = SV x HR
- Cardiac output = stroke volume x Heart rate *
What is the Cardiac index ?
CO divided by body surface area
What is a normal cardiac output for an Adult at rest ?
4-8 Liters per minute
- 1 IV bag = 1L *
_____________ is the volume of blood in the ventricles at the end of diastole ?
( the amount of blood in ventricles before the next contraction)
Preload
In what types of patients do we tend to see a higher incidence of preload ?
Patients with HTN & Hypervolemia
What is Contractility ?
How strong the muscles contract to provide movement of that fluid (preload fluid) ?
____________ is the peripheral resistance against which the left ventricle must pump ?
(How hard the left ventricle has to keep pumping to maintain circulation and cardiac output)
Afterload
Afterload is affected by what ?
- The size of the ventricle
- The wall tension
- Arterial BP
A principle of hemodynamics is that blood always goes where ?
Always goes to where there is less pressure
*If theres an area of high pressure, it will find areas of low pressure to fill it and even it out
A patient is receiving a drug that decreases afterload. To evaluate the effect of the drug, the nurse monitors the patient’s ?
Blood pressure
What is Blood Pressure defined as ?
The Measurement of arterial blood pressure
What does MAP stand for ?
Mean Arterial Pressure
What MAP pressure is needed to perfuse vital organs ?
MAP > 60mmHg
What does a MAP of < 60mmHg mean ?
Means that theres not enough blood getting to the vital organs.
(Ex: Brain, Heart, Lungs, Kidneys, Liver, etc.)
- Don’t want our vital organs to become ischemic *
What is ischemia ?
Happens when theres not enough blood flow or perfusion to vital organs
______ is one of the greatest risk factors for cardiovascular disease ?
Age
In the gerontologic population, what is the most common type of cardiovascular disease that we tend to see ?
CAD
What is the leading cause of death in those age 65 and older ?
Cardiovascular Disease
_____ alters the cardiovascular response to physical and emotional stress ?
Age
With the Gerontologic population, Heart valves become what ?
Thick and stiff
With the Gerontologic population, there is a frequent need for what ?
Pacemakers
Which population is less sensitive to B-andrenergic agonist drugs ?
Gerontologic population
What do B-andrenergic agonist drugs typically do ?
- Relax muscles of the airway
- Widen airways and make it easier to breathe
In the Gerontologic population, what is a common cause of the heart valves becoming thick and stiff ?
- Lipid accumulation
Fibrosis can occur of the valves also
In the Gerontologic population, There is an ____________ in SBP and a ___________ or ___________________ in DBP ?
- INCREASE in SBP
- DECREASE OR NO CHANGE in DBP
- The vessels start to loose elasticity with age *
Why is there a frequent need for pace makers in the Gerontologic population ?
Older individuals are more at risk for disrythmias because they just don’t have those natural SA nodes firing
In regards to heart valves becoming thick and stiff in the gerontologic population, what happens if the heart valves aren’t working properly and don’t have good closure ?
Can result in the regurgitation of blood. So we see a back flow of blood if we don’t have a well closed valve.
- this is when we start hearing heart murmurs
In regards to the “Lub-dub” sound of the heart; which sound is S1 ?
Lub
In regards to the “Lub-dub” sound of the heart; Which sound is S2 ?
Dub
Which heart sound is the closure of the tricuspid and mitral valves (beginning of systole) ?
S1
Which heart sound is the closure of the aortic and pulmonic valves (beginning of diastole) ?
S2
On an ECG, what does the P wave indicate ?
Contraction of the atria
On an ECG, what does the QRS spike indicate ?
Contraction of the ventricle
On an ECG, what does the T wave indicate ?
Repolarization of the cardiac cycle
What are examples of Noninvasive studies of the Cardiovascular system ?
- Blood studies
- Chest x-ray
- Electrocardiogram
- Echocardiogram
- Stress test
What Lab is the most sensitive for cardiac damage ?
Troponin !
What labs fall under “Cardiac enzymes” ?
- Troponin
- CK-MB
- hs, CRP
- BNP
- Lipids
What does the lab CK-MB stand for ?
Creatinine Kinase
What cardiac enzyme, is found primarily in heart muscles ?
CK-MB
- Not as specific as Troponin, as it can also be found in the brain, skeletal muscles, and heart*
What cardiac enzyme can also be found in the brain, skeletal muscle, and heart ?
CK-MB
What does the cardiac enzyme, CRP stand for ?
C-reactive protein
What cardiac enzyme (lab) indicates inflammation ?
CRP
- it can be an indicator of cardiac damage, BUT its not specific to just cardiac muscle. If theres inflammation anywhere else in the body, it can also rise
What does the cardiac enzyme/lab BNP stand for ?
Brain Naturetic Peptide
What lab should be looked at when assessing for Heart Failure ?
BNP
What lab should you look at if your patient is in fluid overload or HF ?
BNP
What Noninvasive test will give rhythm information ?
Electrocardiogram
What Noninvasive test gives us pictures of the heart ?
Echocardiogram
What Noninvasive test is the test of choice to find out what an injection fraction is for a patient ?
Echocardiogram
Which Noninvasive test is used to evaluate heart response to activity ?
Stress Test
What are examples of Invasive diagnostic studies for the cardiovascular system ?
- Transesophageal echocardiogram (TEE test)
- Cardiac catheterization and coronary angiography
- Electrophysiology study
What invasive study uses a scope to go down the throat, bypassing the lungs and ribs and ultimately gets a better picture of the heart and whats going on with it ?
Transesophageal echocardiogram (TEE)
What invasive cardiovascular test, requires the Pt. to be sedated ?
Transesophageal echocardiogram (TEE test)
what invasive cardiovascular study, involves a catheter getting inserted into the heart via a major artery (ex: femoral) to get a better look at the heart ?
Cardiac catheterization and coronary angiography
What invasive cardiovascular study involves a catheter(s) getting inserted into the jugular or femoral vein, and entering in on the R side of the heart, and ultimately records electrical activity within the heart ?
Electrophysiology study
NCLEX Question: A pt. returns to the cardiac observation area following a cardiac catheterization with coronary angiography. Which of the following assessments would require immediate action by the nurse ?
a. ) Pedal pulses are 2+ bilaterally
b. ) Apical pulse is 54bpm
c. ) MAP is 72mmHg
d. ) Chest pain rate 3/10
d. ) Chest pain rate 3/10
* May indicate a myocardial ischemia is present with partial or total occlusion of the coronary artery.
* No matter how minor the chest pain, you will always get a 12 lead EKG, administer morphine and nitroglycerin, and we would notify the health care provider immediately
What are 2 safety precautions we want to follow with coronary artery angiogram(s) ?
- Always want to ask our pt’s. if their allergic to shellfish/iodine
- Hold Metformin for 48 hrs.
With patients who are on Metformin and having a coronary artery angiogram, why do you want to hold the Metformin for 48 hrs ?
Both the dye and the metformin are tough on the kidneys.
- We don’t want to tax the kidneys more than we need to
Cardiac cath’s use what type of dye ?
radio-opaque dye
Radio-opaque dye has a cross allergy to what ?
Shellfish/iodine
Persons > 50yrs with a _______ of > __________mmHg, are more at risk for CVD than diastolic ?
SBP of > 140mmHg
Risk for CVD, beginning at 115/75 does what with each increment of 20/10 ?
Doubles
Persons with a SBP of ___ to ___ or a DBP of ___ to ___ should be considered as prehypertensive & require health-promoting changes ?
SBP of 120 to 139
DBP of 80 to 89
What is the Definition of Hypertension ?
Persistent elevation of - SBP greater than or equal to 140mmHg OR - DBP greater than or equal to 90mmHg OR - Current use of Antihypertensive medication(s)
What is a Normal BP classified as ?
- SBP < 120 & DBP < 80mmHg
What is Prehypertension classified as ?
- SBP 120-139mmHg OR DBP 80-89mmHg
What classifies Stage 1 Hypertension ?
- SBP 140-159 OR DBP 90-99mmHg
What classifies Stage 2 Hypertension ?
- SBP greater than or equal to 160mmHg OR DBP greater than or equal to 100mmHg
What factors influence Blood Pressure ?
- Cardiac output
- Systemic Vascular Resistance
BP = Cardiac Output x Systemic Vascular Resistance
______________________ is the force opposing the movement of blood within the blood vessels
Systemic Vascular Resistance
What is Isolated systolic hypertension defined as ?
SBP > 140mmHg with DBP <90mmHg
Which Subtype of Blood Pressure classification is more common in older adults ?
Isolated systolic hypertension
What subtype of Blood Pressure classification is from sclerotic arteries that do not collapse when the cuff id fully inflated ?
Pseudohypertension
Primary hypertension is also known as ?
Essential or idiopathic hypertension
Which type of Hypertension is most common (primary or secondary) ?
Primary Hypertension