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Location of the heart
- - Mediastinum
- - Between the lungs and above the diaphragm
- -Top= base bottom= apex (opposite the lungs)
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Chambers of the heart
- Four chambers
- · Upper portion- atria= collects and pumps blood to the ventric
- · Lower portion- ventricles= pumps blood to the lungs and the body
- · Septum= separates the heart chambers
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Heart valves (prevent backflow of blood)
- - Atrio-ventricular valves (AV)- between the
- atrium and ventricles
- · Tricuspid- 3 cusps on the right side
- · Mitral- 2 cusps on the left side
- - Semi lunar valves- SL
- · Between the ventricles and arteries
- · Pulmonic- right side
- · Aortic- left side
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Layers of the heart
- Epicardium- outer covering
- Myocardium- muscular wall pumping action
- Endocardium- tissues lining the inner surface of the chambers and valves
- Pericardium- encloses and protects the heart
- (has a little bit of fluid to prevent friction rub)
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Blood flow/circulation
- Pulmonary- goes thru lungs and provides O2 to go to the body
- Cardiac/coronary- blood to heart
- Systemic- O2 and nutrients to the body
- Arteries- O2 and nutrients to the body
- Veins- deoxygenated blood and waste away from the tissues
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Great Vessels of the heart
- Super Vana Cava (SVC)- deoxygenated blood from the upper
- body to the heart
- Inferior Vana Cava (IVC)- deoxygenated blood from the lower
- body to the heart
Pulm A- De oxy blood from the RV to the lungs
Pulm V- Oxy blood from the lungs to the LA
Aorta- Oxy blood to the body
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Systemic Circulation
- Supply tissues with O2 and nutrients
- Return waste to central circulation for
- excretion
- Jugular vein and carotid artery perfuse brain
- SVC subclavian artery perfuse upper limbs
- IVC and thoracic art perfuse lower limbs
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Blood Flow and Circulation
- SVC/IVC and RA de oxy blood
- Thru the tricuspid V to the RV
- Pulmonary Art to the lungs
- Lungs oxygenated blood
- Pulmonary vein to the LA
- LA thru mitral V to LV
- LV to the Aortic V
- Aorta to the body
-
Cardiac Cycle
- Systole- Ventricular contraction
- Diastole- Ventricle relaxation
- Valves closes- sound
- Valves open- silent
-
Diastole
- ventricle relaxes
- AV valve opens
- Blood flows from the atria to the ventricles
- Atria contracts to push the last 30% of blood to ventricles
-
Systole
- Closure of AV valve begins systole
- First heart sound S1 Lub
- Ventricles contract
- Closure of the SL valves
- End of systole
- Second heart sound Dub
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Cardiac Conduction System
- SA nose (sinoartrial node, pacemaker)- keep
- heart beat in normal range
- AV nose (atrioventricular nose)
- Bundle of His- makes ventricles contract
- Perkinjee fibers – makes ventricles contract
-
Cardiac output Heart ability to pump
- CO= SV x HR= amount of blood ejected from the
- left ventricle each minute, 6L-8L/min
-
- SV- Stroke Volume= amount of blood pumped in 1 heart beat
HR- heart rate= number of beats per a minute
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Cardiac Landmarks
Aortic-2nd ICS/RSB
Pulmonic- 2nd ICB/LSB
Tricuspid- 4th -5th ICS/LSB
Mitral- 5th ICS Left MCL
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Cardiac Emergency- requires rapid assessment and
intervention
- S/S= Chest pain, abn BO, inadequate tissue
- perfusion, arrhythmias, change of LOC, pulmonary edema, fluid volume overload
- Assess presenting Sx- location, onset,
- intensity, alleviating, aggravating factors
-
- Testing- EKG’s, Cxr, lab test (cardiac muscle
- damage, electrolytes imbalance- low Na more dangerous can cause siezures)
-
- Need to activate rapid response team
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Pulse Pressure
- Assess difference between systolic and diastolic
- (difference)
-
- Information about SV and Peripheral Vascular
- resistance
-
- Normal- approx. 40 mmhg
-
- How much heart puts out
-
- In elderly this number might be elevated because
- of decrease in elascity
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Inspection
Neck and Precordium (front)- checking for visible pulsation
- Assess for pulsation in the carotids, precordium, and
- epigastric
- Norms:
-
- positive pulsations in the neck (carotid)
- positive pulsations at the 4-5th ics
- mcl
- positive pulsation in the mid abdomen
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Palpation
1. Neck (carotid)
- · Symmetrical Equal pulsation felt in both
- carotids
· Strong smooth and regular
· No changes noted with each pulsation
2. Precordium (heart)
· Palpate over each cardiac landmark
- · Assess for location, size, thrills, lifts heaves
- (rising of the chest)
· Thrill- abnormal fine palpable rushing
- · Lift/heaves- rise with each heart beat
- (abnormal)
Normal
- No pulsation over the aortic and pulmonic areas
- - Positive palpation at the PMI (apical)usually
- 1mm in size
- - No lifts, thrills, heaves (no rise or turbulent
- blood flow)
PMI (point of maximal impulse)
PMI- pulsation felt at the apex of the heart
- -
- Apex- mitral/left ventricular area 5th
- ICS/MCL
- -
- If difficulty palpating the PMI have pt lean
- forward or have pt lay on the left side lateral position
-
Abdominal Aorta
- - Assess in mid abdomen
- Normal- slight pulsation especially in thin
- people
- Aneurysms- weaken of muscles
-
Percussion (limited value for cardiac assessment)
- Assess to locate cardiac borders
- Assess from left of the chest to midline
- Sound will change from resonance (hollow sound) to dullness at the MCL 3-6 ICS
- Difficult to percuss right border of the heart because it is where the sternum is.
-
Auscultation
- Systematic manner
-
- Listening for sounds that identify valve
- closures
-
- Usually start at Aortic, pulmonic, tricuspid,
- mitral
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- Focus on S1 and S2
-
- Listen to the four cardiac landmarks for S1 and
- S2
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S1
- Lub
-
- Closure of the mitral and tricuspid valves
-
- Occurs with the onset of ventricular contraction
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- Best heard in the apical area
-
- Described as low pitched and dull
-
- Louder at tricuspid and mitral areas
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S2
-
- Dub
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- Closure of the aortic and pulmonic valve
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- The end of systole
-
- Best heard at the base
-
- Described as a high pitched and shorter than S1
-
- Louder at aortic and pulmonic areas
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Split S2
- Aortic valves closes slightly earlier than the pulmonic
- valve
Heard best more on the right (on aortic side)
-
abnormal sounds
- 1. Murmur
- Caused my turbulent blood flow
- Valve not opening and closing completely
- Assess- where this is best heard and where it is on the cardiac cycle
- Graded from 1-6 (cards use this)
- Significance can be seen as benign or serious
- (may need to replace)
- Constricted vessels trying to push blood flow
- 2. Bruits
- Swooshing sound heard over a major vessel
- Usually caused by an overextended or blocked vessel, turbulence
- Can be heard over the carotid or abdominal
- aortic area
Pt with Fistula may have a bruit sound which is normal
- 3. Pericardical Friction Rub
- Caused by inflamed pericardial tissue
- Sounds like grating/rubbing sound
- Need to tell the difference between pleural
- friction rub
4. S3 and S4 are abnormal sounds S3 however is normal in children and young adults
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Peripheral Vascular Assessment
1. Assess blood pressure
2. Circulation, sensation, movement (CSM)
3. Assess temp, color, skin
- 4. Assess peripheral pulses (assess rhythm,
- strength and amplitude size fullness. Do not have to count lower extremities.
- Use the pad of your fingers and Doppler if need be.
5. Always check both extremities to compare- equal and strong bilaterally.
- 6. Assess for edema
-
- Assess the entire body
- Dependent areas (feet)
- Edema with obscure bony prominences
- Pitting edema (grade it 1+ ect depending on how much you pushed in)
- Compare
- Grade 1-4
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PVA cont
- 1. Assess for phlebitis (inflammation of a vein)
- Calf circumstance
-
- Color, warm, edema
- Normal- equal calf circumference, legs are warm,
- equal consistent color, no swelling
- Concerns about thrombosis especially in legs
- cause this can travel
- 2. Assess pain
-
- Location, description (scale)what causes pain
- and how long does it last, what relieve the pain?
-
- Assess numbness tingling cramping, changes of sensation (indicative of lack of o2), better, worst sudden or gradual onset,
- associated with activity?
-
- When pts have surgery u expect pain but make sure pain is related to surgery and not circulation. Check CSM
- 3. Lymph nodes
-
- Cervical
- Supraclavicular
- Axillary
- Horizontal and vertical lymph nodes in the legs
- Normal- nonpalpable, small, mobile, nontender, soft
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Diagnostic testing
1. CXR- enlarged heart
2. EKG- chest pain, MI, ischemia
3. Echocardiogram- can tell u how the valves are working
4. Cardiac stress test- treadmill
5. Holter monitor- palpitations
- 6. Cardiac enzymes, troponin- blood levels
- determine muscle damage
7. Lipid and blood sugar
8. BNP- blood test indicative for heart failure
9. ABGs – Ph, O2 and Co2 levels
- 10. Electrolytes-
- cardiac function
- 11. Cardiac
- cath- invasive test/treatment (stent)
-
Nursing Dx
- Decreased cardiac output
- Activity intolerance
- Fatigue
- Fluid volume excess
- Ineffective peripheral tissue perfusion
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