Unit 3 lecture Flashcards
mediastinum
•the space in the chest between the pleural sacs of the lungs that contains all the tissues and organs of the chest except the lungs and pleurae
precordium
•anterior chest wall
point of maximum impulse (PMI)
- where auscultate for apical pulse
- 5th ICS at L midclavicular line
- heart bumps chest wall w/ each beat
heart wall
pericardium -> mycocardium -> endocardium
atrioventricular (AV) valves
- tricuspid (RA -> RV)
* mitral (LA -> LV)
semilunar valves
- pulmonic (RV -> pulmonary artery -> lungs)
* aortic (LV -> aorta -> systemic)
inferior vena cava
•returns blood from liver/lower extremities to RA
superior vena cava
•returns blood from head/upper extremities to RA
pulmonary artery
•delivers unoxygenated blood to lungs
pulmonary veins
•return oxygenated blood to LA
diastole
- blood from LA to LV
- aortic valve closed
- mitral valve open
- b/t S2 and S1
- longer than systole
systole
- ejection of blood from LV into aorta
- aortic valve open
- mitral valve closed
- b/t S1 and S2
S1 heart sounds
- lub
- when MITRAL and tricuspid valves close
- ventricular ctx
- systole begins
- loudest over APEX
S2 heart sounds
- dub
- when AORTIC and pulmonic valves close
- ventricular rlx
- diastole begins
- loudest over BASE
split S2
•R side events occur slightly later than L
•hear closure of aortic valve (loudest) first then hear pulmonic closure
*A valve closure louder than P
split S1
- mitral valve closure louder than tricuspid
* R side events occur slightly later than L
S3 (ventricular gallop)
- extra heart sound caused by rapid ventricular filling
- occurs during diastole after S2
- detected w/ bell
- normal in children
S4
- extra heart sound caused by strong atrial ctx
- heard during diastole just before S1
- normal in older/athletic
murmur
- sound has longer duration
- result of turbulent blood flow
- blowing/swooshing
- caused by increased BV or valvular dz
- high flow, stenosis, incompetent, etc
conduction through heart
- ) SA node (pacemaker)
- ) AV node
- ) Bundle of His
- ) Bundle branches
- ) Purkinje fibers
- ) ventricles
cardiac output
- vol. blood ejected in min
* SVxHR
stroke volume
- vol. of blood ejected w/ each beat
* depends on preload, contractility, afterload
preload
•load that stretches cardiac muscle before ctx
myocardial contractility
•ability of cardiac muscle to ctx
afterload
- decrees of vascular resistance to ventricular ctx
* pressure of aorta
heart failure
•pathogenic increases in pre/after loads
•causes vol./pressure overload
•changes ventricular fxn
*L ventricle stretches and gets tired
carotid arteries
•supply blood to brain, neck, face
internal jugular vein
- drains blood head, brain, face, and neck
* deep to sternocleidomastoid
external jugular vein
•drains blood from outside of skull and deep parts of face
jugular venous pressure
- reflects RA pressure
- best estimated from R external jugular v.
- assess at 30°
aoritc area
- right 2nd ICS at sternal border
* S2 louder
pulmonic area
- left 2nd ICS at sternal border
* S2 louder
Erb’s point
•left 3rd ICS at sternal border
tricuspid area
- left 4th-5th ICS at sternal border
* S1 louder
PMI (mitral area)
- 5th ICS at LMCL
* apex
infant CV
- heart more horizontal
- rate faster (120-160)
- murmurs common (outgrow)
preggo CV
- blood vol. increase
- normal to have murmur
- increase pulse (10-15 bpm)
- BP decreases 2nd trimester and rises back to normal in 3rd
aging adult CV
- CAD
- atherosclerosis
- angina
- MI
- arrhythmia
- S3 or S4 b/c heart loses elasticity (reduced compliance LV)
highest HTN rate
- African Americans
* 36%
female MI symptoms
- Chest pain/discomfort
- upper back
- jaw pain
- lightheadedness
- unusual fatigue
symptoms of heart dz
- inc. resp rate
- SOB on exertion
- dyspnea
- orthopnea
- paroxysmal nocturnal dyspnea
- nocturia
- ankle edema
- pallor/cyanosis (sign)
- arrythmia
- cough- pink sputum; crackles
order of CV/periphery exam
- ) pulse/BP
- ) neck vessels
- ) upper extremities
- ) precordium
- ) lower extremities
carotid artery assessment
- palpate for contour/amp/strength
- auscultate w/ bell while pt holds breath
- rule out bruit/thrill
jugular vein assessment
•30-45 degree angle •turn head away •direct strong, tangential light •should not see distention *look at R external
JVD
- blood flow refluxes (flows backward) from R atrium into jugular vein
- jugular vein visible
diaphragm of stethoscope
•used for HIGH pitched sounds
•S1 and S2 (systole/diastole)
•hold firmly
*listening to valves close
bell of stethoscope
- used for low pitched sounds
- extra heart sounds (S3 & S4)
- murmurs
- hold gently to produce seal
regular heart rate
•60-100 bpm
abnormal findings r/t LV hypertrophy
- heave/lift (see)
* thrill (feel)
abnormal findings related to murmur
- mid systolic click
- S3
- S4
- pericardial friction rub
diastolic murmur
•always means heart disease
*systolic murmur is normally not pathogenic
murmur loudest
•over faulty valve
Grade I systolic murmur
- lowest intensity (loudness)
* difficult to hear
Grade 2 systolic murmur
- low intensity
* usually audible
Grade 3 systolic murmur
- medium intensity
- easy to hear
- no palpable thrill
Grade 4 systolic murmur
- medium intensity
* palpable thrill
Grade 5 systolic murmur
- loud
- palpable thrill
- audible w/ very little scope pressure
Grade 6 systolic murmur
- loudest intensity
- palpable thrill
- audible w/ scope raised above chest
aortic murmur
- stenosis or regurgitation
- from rheumatic heart disease or calcific changes of aging
- cooing
mitral valve murmur
•MVP, regurgitation, or stenosis
•midsystolic click
*MVP more common in women
arterial pulses in arm
- brachial
- radial
- ulnar
O2 rich blood
•expansion/recoil of artery wall
*if present in most distal point, don’t need to check proximal
arterial pulses in legs
- femoral
- popliteal- medial
- dorsalis pedis
- posterior tibial
veins in legs
- great saphenous (med)
- small saphenous (lat)
- communicating vv.
lymphatic system
- retrieves excess fluid from tissues
- returns fluid to venous system
- drains into R lymphatic duct or thoracic duct
- major part of immune system
- absorbs lipids from intestines
major lymph nodes
- upper extremity
* inguinal area
lymphatic capillaries
- located in capillary bed
* remove excess fluid/proteins from interstitial space
lymph dysfunction in capillary bed
•results in edema
*excess fluid in interstitial spaces
causes of edema
- ) increased cap. blood pressure
- ) increased capillary membrane permeability
- ) low plasma protein levels
- ) blockage or removal of lymphatic drainage
causes of increased capillary blood pressure
- CHF
* venous insufficiency
causes of increased capillary membrane permeability
•capillary leak syndrome- inflammatory response to burns, allergic rxn, etc
causes low plasma protein levels
•renal disorder
lymphedema
- usually non-pitting
- result of lymph node removal
- very common post-mastectomy
peripheral vascular symptoms
- leg pain/cramps
- intermittent claudication
- varicosities
- skin/sensation changes
- edema
- node enlargement
- non-healing wounds
- paresthesia
weak thready pulse
•indicates decreased cardiac output or shock
posterior tibial pulse
•medial
arterial insufficeincy
- problem getting to periphery
- lower leg BELOW ankle
- deep ulcer w/ smooth margin little drainage
- gangrene
- shiny, cool lower ext
- leg hair sparse/absent
- pulse diminished/absent
venous stasis
- problem getting out of periphery
- pooling of blood
- lower leg ABOVE
- ulcer w/ irregular border and drainage
- edema
- warm/red legs/feet
Homan’s Sign
•calf pain on dorsiflexion
•indicator of deep vein thrombosis (DVT)
•if suspected, don’t let pt ambulate b/c at risk for pulmonary embolism
*not a diagnostic
virchow’s triad
*those at risk for DVT •vessel injury- after surgery •hypercoagulability- preggo •venous stasis- quadriplegia; immobile *also at risk if use contraceptives or smoke
Allen Test
- test for in tact ulnar artery before doing ABG draw on radial artery
- depress radial artery while pt opens/closes fist
- normal- blood returns vial ulnar artery
- occluded ulnar artery- no blood return
congestive heart failure
- as blood flow out of heart slows, blood returning through veins regurgitates
- causes congestion in tissues (legs, ankles, lungs, etc)
musculoskeletal system
•skeletal muscle •connective tissue: 1.) bone 2.) cartilage 3.) ligaments 4.) tendons 5.) fascia
more elastic connective tissue…
•more ROM
calcium
•essential for bone growth
vitamin D
•necessary for calcium absorption
non-synovial joints
- bound by fibrous tissue
* immovable
synovial joints
- most common
- movable
- ball and socket; hinge
temporomandibular joint (TMJ)
- articulation of mandible and temporal bone
- hinge
- anterior targus
spine
•33 vertebrae w/ intervertebral disk b/t
landmarks on spine
•C7 and T1 are prominent on base of neck
Vertebral curvature
- cervical/lumbar- lordosis (concave)
* thoracic/sacral- kyphosis (convex)
shoulder landmarks
•acromion process
•greater tubercle of humerus
•coracoid process of scapula
*important for IM injections
acetabulum
- hip joint/socket
* where femoral head articulates
tibiotalar joint
- ankle
* hinge
medial/lateral malleolus
- bony prominences on either side of ankle
- medial- distal tibia
- lateral- distal fibula