Blonder Flashcards
VSD
Most common congenital heart disease at birth, only accounts for 10% of adult congenital due to spontaneous closure.
VSD
4 Types
InfundibularVSD
Membranous VSD
Inlet Defect VSD
Muscular VSD
InfundibularVSD
below the aortic and pulmonic valves, leading to progressive aortic regurgitation, the hallmark.
Membranous VSD
also called conoventricular, deficencyof the membranous septum.
Inlet Defect VSD
av canal, Down’s
Muscular VSD
in the trabecular system, 5-20%
VSD rarely missed bc
they have long loud holosystolic murmur at left sternal border similar to mitral and tricuspid regurg, they are difficult to tell apart
VSD-Pathophysiology
Direction and severity
determined by functional size and the ratio of pulmonary to systemic vascular resistance
usually blood flows left to right to start out bc easier to get blood out of right than left
VSD-Pathophysiology 1
- Small or Restrictive VSD have orifice diameter
- R shunt with no LV volume overload
- No pulmonary Hypertension
VSD-Pathophysiology 2
•Moderate sized defect, >25%-
VSD-Pathophysiology 3
- Large VSD, >=75% of annulus
- Moderate to large L>R shunts with LV volume overload, if uncorrected leads to
- PHTN develops with pulmonary arterial obstructive disease
VSD-Pathophysiology 4
- Progressive pulmonary hypertension leads to RV pressures approaching systemic
- Leads to reversal of shunt with R>L flow
- Hypoxemia and cyanosis develop
- This is Eisenmengersyndrome, and when coupled with VSD is called EisenmengerComplex
VSD-Pathophysiology
Endocardial Scarring
bc blood is spurting into other ventricle
VSD-Pathophysiology
left ventricle pushes blood up towards pulmonary artery
when it pushes it across, this happens during systole so the blood flows right into the pulmonary artery and it floods the artery quick and they get sob etc
can get endocarditis, pretty common
VSD-Clinical
Small defect
small L>R shunt, asymptomatic adults
VSD-Clinical
Moderate sized defect
either asymptomatic or mild CHF in children, usually gets smaller with growth and may have AR
VSD-Clinical
Large VSD
Usually early presentation with CHF in infancy or Eisenmenger’sin late childhood, early adulthood.
VSD
PE
large holosystolic, LSB, 2ndor 3rdICS, thrill
VSD
EKG
66% of small are normal.
VSD
Echo
test of choice
amount of flow across defect
VSD
CT/MRI
excellent for complex lesions
VSD
Cath
less important now with advanced Echo and MR
What is a shock?
when you feel the heart sound
Tetralogy of Fallot
4 Features
- RVOT obstruction
- VSD
- Aorta overrides IVS
- Concentric RVH
TOF
10% of CHD
one of most common cyanotic congenital heart disease
TOF
The need for medical intervention
is dependent on the degree of RVOT obstruction
Tetralogy of Fallot
RVOT obstruction
pulmonic stenosis..
Tetralogy of Fallot
Aorta overrides IVS
get blood from right and left ventricle going out systmically
Tetralogy of Fallot
Concentric RVH
consequence of everything else
ASD-Summary
ASD is an open communication between the atria via a defect in the intra-atrial septum
ASD-Summary
Septum
when 2 pieces come apart it is patent foramen ovale (pfo), pfo is not a disease, 20-25% of adults have a flap that opens, bubble study you inject saline into vein, you can see it go into the the atria and back and forth if there is a shunt, more difficult to see left to right shunt,
always a little bit of both in asd
ASD-Summary
PFO
Patent Foramen Ovaleis a foramen covered by the septum primumbut is not sealed shut in 20% of normal subjects
ASD
Diagnosis
made primarily by echocardiography
ASD-Summary
Transient R>L shunting
occurs in most patients during the onset of ventricular contraction, explaining neurologic events in non cyanotic patients.
ASD Right to Left shunt get a?
stroke in right to left shunt bc clot goes to brain
ASD right to left shunt extra shunting of blood from right is done by
oxygen
ASD right to left shunt size of hole
cause more blood being shunted, or resistance (if high systemic ressitance the left ventricle will put out more pressure, if you have a higher pulmonary resistance the rigth ventricle will actually be putting out more flow than the left ventricle so you will get even more shunting causing hypoxia, so you get eisenmengers (clubbed sob)
ASD right to left shunt don’t want right sided resistance to increase bc
you will eventually need a heart and lung transplant
ASD right sided volume overload is well tolerated for?
years
ASD
essential htn causes increased resistance
(increased afterload), left ventricle will thicken, then right will thicken then right will dialate
ASD is what kind of problem?
volume problem which the heart tolerates better than increased resistance
Volume problems effect what first?
right ventricle
ASD
modality of choice for diagnosis and characterization of the defect?
Echocardiography
Bicuspid Aortic Valve
MVP-MyxomatousMitral Valve
ASD-Atrial Septal Defect
Ventricular Septal Defect
Not sure why but these were altogether right after ASD, volume overload and echo. they were also before this slide
Other common defects •Tetrologyof Fallot •Ebstein’s •Eisenmenger •PDA
I think they might be volume overload problems
ASD
Second most common
adult congenital after Bicuspid AV
ASD
Usually asymptomatic
until adulthood
ASD
Complications include
- Atrial Arrhythmias
- Paradoxical Embolus
- Cerebral Abcess
- Right Heart Failure
- Pulmonary Hypertension>EisenmengerSyndrome
ASD
Atrial Arrhythmias
most common is afib, premature atrial beats then go into fib
ASD
Paradoxical Embolus
dvt then stroke
ASD
Cerebral Abcess
infection embolizes across asd into brain
ASD
Right Heart Failure
happens after 25 years of volume overload, rigth ventricle starts to fail
ASD
Pulmonary Hypertension>EisenmengerSyndrome
media and intima scrinch down and you increase resistance, pressure goeas up and r vent fails
ASD
Types
Secundum ASD
Primum ASD
Sinus Venosus ASD
Secundum ASD
- 70% of ASD
- More common in females
- Due to defects in the foramen ovalis
- Usually not associated with other cardiac defects
in the middle of septum
usually you get urology problems too but not this one
Primum ASD
- Large
- 15%-20% of ASD
- Almost always associated with defects in the AV valves or Ventricular septum
- AV Canal, or EndocardialCushion Defect is the complete form
patient is more sick
in the bottom of the septum
tricuspid and mitral valve can get clefts leading to insufficiency
can get catheter into left atrium and left ventricle or right side respectively called canals..
look at patients palms to see if they are anemic
Sinus VenosusASD
•5%-10% of ASD
•Often associated (>90%) with anomalous pulmonary vein insertion
1 or more that feed right atrium instead of left atrium, essentially same as septal defect bc you get oxygenated blood in right atrium
- Two types:
- Superior Sinus Venosus-SVC Defect
- Inferior Sinus VenosusDefect-IVC Defect
at the top of the septum in right atrium by sa node
ASD
Scimitar Syndrome
- Partial anomalous venous return
- Hypoplasia of a lobe of the right lung
- Thoracic aorta>Pulmonary artery collaterals
ASD Pathophysiology
The shunt depends on the size of the defect
the compliance of the right and left ventricles, and the phases of contraction (systole/diastole, atrial ventricular, early or late in phase)
ASD Pathophysiology
Most shunts start
L>R, but all large shunts have some R>L
most shunts start left to right bc resistance to ejection of the left ventr is greater than the resistance of the right, as pulmonary vascular resistance goes up the shunting starts to change to right to left you get clubbing and cyanosis
ASD Pathophysiology
Shunt flow leads to a “useless circuit”
Shunt flow leads to a “useless circuit”
of blood through the defect, into the RA,RV,PA,LA back to RA. The flow may be trivial or as much as 8:1, but more likely 2:1-5:1.
measure amount of blood going through heart to the amount going to the systemic circuit
5: 1 means five times more blood going across asd than out of the left ventricle
2: 1 is the cutoff where they need intervention
ASD Pathophysiology
Shunt flow leads to a “useless circuit” Leads to
Right heart volume overload, well tolerated for years, but can cause Pulmonary Hypertension and Eisenmengers
normally right sided is a?
fifth of the left sided
cad is a disease of the left ventricle most of the time bc
the left ventricle has to do more work bc the resistance is 5x higher than that of the r ventricle
ASD Natural Histroy
•Lesions
ASD Clinical Manifestation
Most patients with ASD and significant shunt flow (>2:1)
will become symptomatic and require surgical repair by age 40
32-55
ASD Clinical Manifestation
Atrial Arrhythmias
make pts decompensate
20% atrial fibrillation or flutter, increases with advancing age
At risk for embolic events, including stroke, including paradoxical stroke, systemic emboli
ASD Clinical Manifestation
Migraine cephalgiamay be associated
study is not panning out, just as many pts that got procedure had migraine resolution as those that had them closed?
maybe some association
ASD Clinical Manifestation
Pulmonary Hypertension and Eisenmengersyndrome, requires
> 2.5:1 shunt
ASD Clinical Manifestation
Cyanosis
Usually associated with concomitant Pulmonic Valve Stenosis or Eisenmengers
ASD
Physical findings are related to three things
- Size and location of defect
- Size of the shunt
- Pulmonary Artery Pressure (resistance)
ASD PE
Precordium
- RV Heave
* Palpable PA at upper LSB
ASD PE
Heart Sounds:
- Wide fixed split S2
- Increased P2 with Pulmonary Hypertension
- S1 split with increase in Tricuspid component
ASD PE
Heart Murmurs:
- SEM Upper LSB from increased flow
* Early DM, upper LSB from PI secondary to pulmonary hypertension
Infective Endocarditis (SBE, ABE)
not subacute anymore
bc it is often acute
janeway lesions, roth spots, osler nodes want to heal before they start, they are autoimmune antibodies reacting with other parts of the bod
IE Usually presents
acutely not sub acutely (as before antibiotic age)
IE Careful clinical history focused on
indwelling prosthetic devices such as; IV catheters, orthopedic hardware, cardiac devices.
aortic and mitral valve replacements
iv drug abuse
dialysis
hypoalimentation
chemo ports
IE IV drug use/abuse
is one of the most important factors
IE PE should focus on
new regurgitant murmurs and CHF
IE Look for stigmata of endocarditis to include
petichiae hemorrhage, Roth spots, Janeway lesions, Osler nodes. Remember most of these are signs of sub acute, not acute disease and they will be absent.
ASD is what heart sound?
second
IE Blonder overview
bacteria eat up structures (staph and psuedomonas cause this
right sided mostly tricuspid
left sided is both valves over there
right sided endocarditis is iv drug abusers pacemakers laying across tricupid valve (usually no problem bc the pressure is usually not that great)
damage then thrombus is a great place for the bacteria to seed
s. aureaus is most common cause of acute bacterial endocarditis, esp drugs and iv catheters (coagulase neg staph and other skin ones)
IE Murmur overview Blonder
listen for aortic and mitral regurg tricuspid and maybe pulmonic
easier to hear in left side murmurs bc the resistance so the pressure gradient is higher. drop in pressure produces acoustic energy from left ventircle to left atrium
to tell diff of tricuspid and mitral, if you take a breath in the tricuspid gets louder, neck veins are big with tricuspid regurg
IE Diagnosis
- Modified Duke criteria are used.
- The diagnosis is usually straight forward if the pathogen is obtained on blood culture, it is likely to cause endocarditis and there is evidence of endocardial involvement.
IE blonder diagnosis
have to have bacteria that causes endocarditis, subsrate for endocarditis to grow, suually produces valvular insufficiency
prosthetic valves can get bacteria on them so it can be stenotic
IE Duke Criteria
Definite IE
- Pathologic criteria
- micro organism recovered from tissue (embolus, abscess, culture)
- Histologic proof of organism
- Clinical criteria
- 2 major or
- 1 major and 3 minor
- 5 minor
IE Duke
Possible IE
- 1 major and 1 minor
- or 3 minor
- Rejected IE
- firm alternative diagnosis or
- resolution of manifestations with 4 days of antibiotics or
- No pathologic evidence of IE at surgery or autopsy after only 4 days of Rx
- Does not meet criteria above
Duke Major Criteria
- Positive blood culture
- Typical micro organism for IE from two separate blood cultures;
- Persistently positive blood cultures;
- blood cultures drawn more then 12 hours apart, or
- ¾ positive cultures
- Single positive culture for Coxiella burnetii or antiphase I IgG antibody titer >1:800
- Evidence of endocardial involvement
- Very important
- Positive echocardiogram
- New valvular regurgitation
Viridans Strep
Most common Ie most common oral pathoge
HACEK group
require special cutlure so let them know what you are looking for
IE
if pt is on antibiotics
you will not get a culture so keep this in mind
IE
most common cause
no endocarditis at al
l, made a mistake, hard to diagnose and hard to treat, culture negative endocarditis is 5-8% of endocarditis
Typical micro organism for IE from two separate blood cultures;
- Viridans Stre0
- Strep gallolyticus (bovis)
- HACEK group
- Staph aureus
- Community acquired enterocci or
Other things to look for in Duke majore
anemia, valve regurg sick, nausea anorexic
if the pt comes in late they could have glomerulonephritis along with the lesions
Positive Echocardiogram in IE
vegetations and clumps of bacteria on valves on maybe on the wall
Duke minor
- Predisposition
- Fever (100.4 F, 38 C)
- Vascular findings
- Immunologic findings
- Positive blood cultures not meeting above major criteria
- Serologic evidence of infection
Blood cultures for IE
- Obtain blood cultures prior to iniation of antibiotics, if feasible (“do no harm”)
- At least 3 sets of cultures
- Separate sites, not catheter (could have bacteria)
- Typical organisms are Staph Aureus, viridanstrep, strep bovis, enterococci and HACEK group.
Try to make diagnosis of IE before?
antibiotics but the pts health is always number 1
Echocardiogram
Should be obtained in all patients of IE
a TTE first, TEE if indicated
TTE
transthoracic echo, transducer on chest 5 different views
TEE
transesophageal echo
pt swallows echo probe, and look at heart from esophagus gives you great view of left atrium mitral valve left ventricle and not a great view of the right side
only use if didnt get it on tte so dont do it if youre looking at the right side
IE
Questions?
high fevers sick for weeks it will be anemic, treat quick or people will die
Atrial Fibrillation (AF) overview
- The most common cardiac arrhythmia
- The RR interval follows no repetitive pattern
- No distinct “P” waves, undulation of the baseline, atrial rate 300-600 beats/minute
Afib main risk
cardiac emboli, to the brain, 50% of strokes to brain come from this
A fib antithrombin drugs overview
dabigatran pradaxone only direct thrombin inhibitor others are factor Xa inihibitors, upset stomach reflux
xarelto rivaraxaban bc its once a day
eliquis epixiban twice a day
endoxaban once a day
these drugs are expensive
warfarin is what you take when you cant afford these ones
A fib pearls
and undulation of baseline, bc atria is trying to depolarize, it looks like a bag of worms when you go to surgery
when heart rate goes up it encroaches on diastole and the heart fails, lost atria to fill you raise heart rate so there is less time to fill passively and you get heart failure
diagnose immediately based on pulse, atrial rate is between 3 amd 6oo beat per minute
irregular distances between complexes
no obvious p waves seen
Af risk factors
- More common in men
- Increases with age
less than 1% in 20s
15% in 80s
AF reduces cardiac output by
decreasing filling from increased rate encroaching on diastolic filling time and loss of atrial contribution to ventricular filling
AF etioloy
whatever is most common heart disease in your local
medication can cause
- Hypertensive Heart Disease
- CHD
- RF in underdeveloped countries
- Hyperthyroidism
- Genetic (likely most common)
minor abnormality of dna junction inbetween strands cause afib
AF
Changes in the
refractory period of the underlying atrial musculature
AF what often precipitates?
PAC (APBs) often precipitate atrial fib of all kinds
pts who develop it have it precipitated by premature atrial beats, if you can suppress them you might be able to suppress afib for a time
AF may be?
valvularor non-valvular
treatment is warfarin