w3 Flashcards
HF is an issue with
_________ = amount of resistance/pressure LV has to overcome to pump blood out of heart
Increased afterload is harder on heart
_________ = too fast/slow for a long period of time
__________ = amount of blood comes into heart during diastole (filling)
Increases blood volume = increases preload
___________= myocardial cells ability to contract
HF is an issue with
- afterload = amount of resistance/pressure LV has to overcome to pump blood out of heart
Increased afterload is harder on heart - heart rate = too fast/slow for a long period of time
- preload = amount of blood comes into heart during diastole (filling)
Increases blood volume = increases preload - myocardial contractility = myocardial cells ability to contract
- cause = ventricular repolarization/relaxation
- unexpected = peaked
- T wave
3 main s/s of PAD
- _________
- ________
- issues r/t _______:
(- Hair loss
- Dry, scaly, dusky, pale or mottled skin
- Thick toenails
- Skin cool to the touch
- Prolonged cap refill
- Decreased/weak pedal pulse
- Dependent rubor - skin of the lower extremities turns a reddish color when the legs are in a dependent position (dangling down).
- Muscle atrophy)
intermittent claudication
arterial ulcers
issues r/t lack of arterial perfusion
saw tooth =
quiver =
A flutter
A fibrillation
Spironolactone (potassium sparing diuretic)
class: mineralocorticoid receptor antagonist
- used with chronic HF
- is it being used as a diuretic?
- is it being used for suppression of sodium/water retention to help with offloading the LV?
- watch for hyp__kalemia and worsening__________
- Not being used as a diuretic
- Being used for suppression of sodium/water retention to help with offloading the LV
- watch for hyperkalemia and worsening renal failure
- cause = SA node triggers atrial depolarization/contraction
- P wave
- cause = SA node triggers atrial depolarization/contraction
drugs for rhythm control, rate control, or drugs to prevent clots?
metoprolol =
diltiazem, verapamil =
Amiodarone and dofetilide =
Warfarin =
Which is Calcium channel blockers and Beta adrenergic blockers?
metoprolol = Beta adrenergic blockers, rate control,
diltiazem, verapamil = Calcium channel blockers, rate control,
Amiodarone and dofetilide = for rhythm control,
Warfarin = drugs to prevent clots
A fib/A flutter Treatment
- treatment goals =
- ________ control
- _______ control
- Prevent _______
- drugs for rate control – IV route initially
- ______________
- ______________
- drugs for rhythm control – IV route initially
- ______________
- ______________
- drugs to prevent clots
- ______________
rate or rhythm priority?
- Ventricular rate control (lower HR)
- Rhythm control
- Prevent embolic stroke
- drugs for rate control – priority, IV route initially
- Beta adrenergic blockers – metoprolol
- Calcium channel blockers – diltiazem, verapamil
- drugs for rhythm control – IV route initially
- Amiodarone and dofetilide
- drugs to prevent clots
- Warfarin
rate
Tachydysrhythmias can cause –
good or bad?
- initially, may __crease CO and BP
- eventually, if sustained or increased, ventricular filling will __crease = __creased CO and BP
- _________ diastole = shortens coronary perfusion time = angina
- workload on heart ___creases = myocardial oxygen demand increases
good:
- initially, may increase CO and BP
bad:
- eventually, if sustained or increased, ventricular filling will decrease = decreased CO and BP
bad
- shortened diastole = shortens coronary perfusion time = angina
bad
- workload on heart increases = myocardial oxygen demand increases
A fib/A flutter Treatment
- if hemodynamically unstable (VS are not ok) =
- Synchronized cardioversion/cardiovert/life pack = synchronized circuit delivers a countershock on the R wave of the QRS complex which gives you back your atrial kick
tele vs 12 lead EKG
1- Continuous observation of HR and rhythm (nurse can be at bedside or at nurses station)
2- monitoring only
3- can be diagnostic
4- unidimensional view
5- snapshot in time
6- routine or STAT
7- multidimensional view
8- done by EKG tech at bedside
9- nurse doesn’t interpret
1- T
2- T
3- 12 lead EKG
4- T
5- 12 lead EKG
6- 12 lead EKG
7- 12 lead EKG
8- 12 lead EKG
9- 12 lead EKG
s/s
- asymptomatic
- may be found during routine physical exam
- pulsatile mass in periumbilical area
- bruit present in abdomen
- back pain
Abdominal aortic aneurysm
Raynaud’s phenomenon: Nursing care
- primary focus = patient _______
- ________ clothing
- Gloves with _____ items
- Avoid temp _________
- Immersing hands in ______ water may decrease vasospasm
- Avoid _______ – cold, emotional upset, tobacco, caffeine
- drug therapy - _______ blockers
- 1st line
- used to lower BP?
- Used to treat _______ in peripheral vessels
Nursing care
- primary focus = patient teaching
- Layered clothing
- Gloves with cold items
- Avoid temp extremes
- Immersing hands in warm water may decrease vasospasm
- Avoid triggers – cold, emotional upset, tobacco, caffeine
- drug therapy - SR calcium channel blockers
- 1st line
- Not used to lower BP
- Used to treat vasospasm in peripheral vessels
Some patients may be able to tolerate a HR outside of 60-100 if their ___ remains adequate
How do we know – they will be asymptomatic or symptomatic
Asymptomatic -
- _______ + _______ = asymptomatic = they can tolerate abnormal HR
Symptomatic -
- ________ + ________ = symptomatic = they can’t tolerate abnormal HR
- may lead to
- Myocardial ischemia/infarct
- Dysrhythmias
- Hypotension or HTN?
- HF
Asymptomatic -
- Bradycardia/tachycardia + BP remain adequate = asymptomatic = they can tolerate abnormal HR
Symptomatic -
- Bradycardia/tachycardia + BP doesn’t remain adequate = symptomatic = they can’t tolerate abnormal HR
- may lead to
- Myocardial ischemia/infarct
- Dysrhythmias
- Hypotension
- HF
cardiovert and defibrillation:
- _________ = synchronized circuit delivers a countershock on the R wave of the QRS complex which gives you back your atrial kick
- ___________ = (synchronized switch is turned on)
- if switch is turned on pt must have _________
- turning the synch switch on means it will fire when?
- If the lifepack is not synched and fires at wrong time = trigger
- For defibrillation
- (synchronized switch is turned _______)
- Pt does or doesn’t have QRS complex/R wave? - when the switch is off = does not synch up with pts QRS and will fire ________
- Synchronized cardioversion/cardiovert/life pack
- synchronized cardioversion/cardiovert
- R wave/QRS complex
- This will synch up with pts QRS and fire at the appropriate time
- If the lifepack is not synched and fires at wrong time = trigger life threatening dysrhythmias
- For defibrillation (synchronized switch is turned off) – Pt doesn’t have QRS complex/R wave (ex: Vfib or VTACH)
- This does not synch up with pts QRS and will fire as soon as the button is pressed
which dysrhythmia
- originates in ectopic focus anywhere above bifurcation of bundle of His, anywhere in atria
- run of repeated premature beats, that starts and stops abruptly
- usually initiated by a PAC
- rate is > 100 bpm
PSVT
Paroxysmal supraventricular tachycardia
- originates in ectopic focus anywhere above bifurcation of bundle of His, anywhere in atria (supraventricular)
- run or repeated premature beats, that starts and stops abruptly (paroxysmal)
- start of P wave to start of QRS complex
- expected 0.12 – 0.20 seconds
PR interval
Afib
Explanation of different rates
- atrial rate > 400 bpm
- ventricular rate up to 100-175 bpm
- ___ node is gate keeper helping to slow >400 bpm down, so only some of the atrial pulses are conducted though the ___ node
- all the little quivers are the _______ firing that didn’t get through to the AV node (called ___ waves)
- the ___________ is the ectopic firing that did get through the AV node
Explanation of different rates -
- atrial rate > 400 bpm
- ventricular rate up to 100-175 bpm
- AV node is gate keeper helping to slow >400 bpm down, so only some of the atrial pulses are conducted though the AV node
- all the little quivers are the ectopic sites firing that didn’t get through to the AV node (called f waves)
- the QRS complex is the ectopic firing that did get through the AV node
Causes of ______
- can occur with any underlying heart disease
- electrolyte imbalance
- hypoxia
- cardiac surgery
A fib
You can live with A fib?
You can live with Vfib?
yes - You can live with A fib, bc what really matters is ventricular rate
Ex: if patient is A fib with HR 90, he can live with this b/c ventricle rate is under control (not ideal, but possible)
no - can’t live with vfib
Venous thromboembolism VTE
Patho:
- 3 things occur
______
______
______
- as a result
________
Venous thromboembolism VTE
Patho
- 3 things occur
- Venous stasis
- Endothelial tissue damage
- Blood thickens (hypercoagulability)
- as a result
- Thrombus forms
Start of QRS complex to end of T wave
- QT interval
Causes of ______
- benign (common)
- electrolyte imbalance
- stress
- cardiac stimulants – caffeine
- atrial pathology (any disease or abnormality that affects the atria of the heart, includes: A fib, A flutter)
PAC
- cause = AV node triggers ventricular depolarization/contraction
- atrial repolarization/relaxation occurs here, can’t see it on EKG
- expected = “skinny or narrow”
- QRS complex (R wave)