Cardiology Flashcards
ST elevation in leads 1, Avl, V5 and V6 - which artery affected
right coronary artery (inferior territory MI)
ST elevation in leads V1 - V4 - which artery affected
anterior MI - left anterior descending artery
ST elevation in leads 2, 3 and AVF - which artery affected
lateral MI - left circumflex artery
findings in hypertensive retinopathy on fundoscopy
- papilloedema
- cotton wool spots
- flame haemorrhages
eye findings in infective endocarditis
roth spots
2 x signs of hypercholesterolaemia on examination
xanthelasma
corneal arcus
findings on chest x ray in pulmonary oedema (heart failure)
alveolar oedema (batwing distribution) Kerley B lines cardiomegaly Diversion (upper lobe diversion) pleural effusions fluid in fissures
^ABCDEF
which classification system is used for heart failure
new york heart association
name 3 cardiac enzymes that can indicate ischaemia / muscle damage
- troponin
- lactate dehydrogenase
- creatinine kinase
what criteria is used for a diagnosis of infective endocarditis
Duke criteria
name the components of duke criteria (infective endocarditis)
major criteria:
positive blood cultures (2 x samples)
evidence of cardiac involvement: ECG changes / new valvular regurg, new murmur, worsening of pre existing murmur
minor:
predisposing heart condition
IVDU
fever
vascular phenomena eg arterial emboli, janeway lesions, conjunctival haemorrhage
immune phenomena: oslers nodes, glomerulonephritis, roth spots
microbiological evidence
how do you manage acute pulmonary oedema
- oxygen
- nitrates (in the case of heart failure)
- IV furosemide or bumetanide (loop)
what is the most common complication of an MI
ventricular fibrillation (most common cause of death) and ventricular tachycardia
which type of arrythmia is common following an inferior MI
AV block
what is dresslers syndrome
a complication that occurs around 2-3 weeks post-MI usually due to an autoimmune reaction when the myocardium is recovering
CP: fever, pleuritic chest pain + raised ESR
management of dresslers syndrome
NSAIDS
common complication following a transmural MI
pericarditis
occurs in 48 hours of MI
CP: pleuritic chest pain, pericardial rub on ausciltation
symptoms of left ventricular aneurysm post mi
extreme tiredness increasing SOB if clot forms can cause a stroke palpitations / new arrhythmia oedema
how should you manage pts with a left ventricular aneurysm post MI
anticoagulate bc at increased risk of a clot firing off
how long after an MI does a left ventricular free wall rupture occur
1-2 weeks after
how does a left ventricular free wall rupture present
1-2 weeks post MI, acute heart failure secondary to a cardiac tamponade:
raised JVP, SOB, cough, frothy white / pink sputum, peripheral oedema, chest pain
syncope
pulsus paroxodus
diminished heart sounds
what is pulsus paradoxus
an abnormally large decrease in stroke volume, systolic BP and pulse wave amplitude during inspiration
drop has to be over 10mmhg
management of cardiac tamponade
urgent pericardiocentesis + thoracotomy
acute heart failure 1 week post MI with a pan systolic murmur
ventricular septal defect caused by MI
acute heart failure with sharp chest pain and collapse 2 weeks post MI with pulsus paradoxus and diminished heart sounds
ventricular free wall rupture
signs on examination in aortic regurg
- early diastolic murmur heart at left sternal edge 3rd intercostal
- collapsing pulse
3.
slow rising pulse
aortic stenosis
presentation of infective endocarditis
high persistent fever generally unwell - myalgia, arthraliga, malaise palpitations - new murmur SOB headache anorexia night sweats
findings on examination of a pt with infective endocarditis
janeway lesions (palms) roth spots (eyes) osler nodes splinter haemorrhages (nails) petechiae / purpura splenomegaly new or changing murmur
what diagnostic criteria is used for infective endocarditis
modified duke criteria
2 major criteria in duke criteria for IE
evidence of endocardial involvement on echo or auscultates a new valve regurg or new/changing murmur
2x positive blood cultures showing a typical organism eg strep viridans or persistent bacteraemia from a less specific organism eg staph aureus.
4 minor criteria in duke criteria for IE
predisposing heart condition
IVDU
persistent fever over 38 degrees
vascular phenomenon: splinter haemorrhages, janeway lesions, purpura/petechiae
immunological phenomenon: osler nodes, roth spots, glomerulonephritis
most common causative organism for infective endocarditis
staph aureus
causative organisms for infective endocarditis
staph aureus
strep viridans
staph epididermis
most common organism for infective endocarditis after valve surgery
staph epididermis
most common organism for infective endocarditis in IVDU
staph aureus
name 5 risk factors for infective endocarditis
IVDU recent prosthetic heart valvue surgery prev IE infection poor dental hygeine SLE (can cause non-infective endocarditis) congenital heart defects eg PDA rheumatic valve disease recent piercings / tattoo
what is the strongest risk factor for infective endocarditis
previous episode of IE
name 3 complications of infective endocarditis
aortic abscess
heart failure
death
which organism that causes infective endocarditis carries the worst prognosis
staph aureus
management of infective endocarditis initially (before cultures back)
amoxicillin +low dose gent if normal valve
vancomycin if pen allerg
Vancomycin + low dose gent + rifampicin if prosthetic valve
management of infective endocarditis with prosthetic valve + staph infection
flucloxacillin + rifampicin + low dose gent
management of infective endocarditis with normal valve and staph infection
Flucloxacillin + low dose gent
management of infective endocarditis with normal valve and strep infection
Benzylpenicillin and low dose gent
management of infective endocarditis with prosthetic valve and strep infection
Rifampicin, Benzylpenicillin and low dose gent
what antibiotic do you use in infective endocarditis for pen allergic patients
Vancomycin + low dose gentamicin
what antibiotic do you add in patients with a prosthetic heart valve for infective endocarditis
Rifampicin
what investigations would you order in a patient with suspected infective endocarditis
- 2 x blood cultures taken 12 hours apart
- sepsis 6
- echo
- ECG
5 - FBC U+E LFT CRP ESR - complement levels - used for prognosis
- autoimmune antibodies if thinking sle
what is the most common type of cardiomyopathy
dilated
name the cardiomyopathies that are primarily systolic dysfunction
dilated = weakens and thins the muscles = cant contract properly bc weak = systolic dysfunction
name the cardiomyopathies that are primarily diastolic dysfunction
hypertrophic = muscle too big = makes the area inside the ventricles smaller = cant fill properly = diastolic problem
restrictive = a hard and stiff ventricle = doesnt move to open up to fill properly = increased ventricular pressure all the time due to it being stiff so gets backflow of blood = diastolic problem
which chambers become dilated in dilated cardiomyopathy
all 4 chambers become dilated, but left ventricle dialted more than the right
name 4 causes of a dilated cardiomyopathy
alcohol coxsackie B virus HTN cocaine duchenne muscular dystrophy
what is cor pulmonale
right sided heart failure caused by an increase in pulmonary vessel pressures (pulmonary hypertension)
name 4 causes of cor pulmonale
COPD
interstitial lung disease
cystic fibrosis
PE
how does cor pulmonale present
often asymptomatic to begin with
then right side heart failure symptoms: raised JVP, peripheral oedema, hepatomegaly, heart murmur, cyanosis, syncope, SOBOE
symptoms of right heart failure
peripheral oedema ascites raised JVP hepatomegaly sacral oedema
symptoms of left heart failure
pulmonary oedema (pink frothy sputum) nocturnal paroxysmal dyspnoea orthopnoea nocturnal cough weight loss cool peripheries SOB fatigue poor exercise tolerance
name 2 causes of high output heart failure
anaemia
thyrotoxicosis
what 4 investigations would you do to diagnose heart failure and why
- BNP
- echo - to look at EF and look for a cause
- ECG - to look for hypertrophies or ischaemic changes
- bloods = U+E for any meds going to start, FBC for anaemia that may be making heart failure worse
what is pre load
the pressure needed to over come to pump blood into ventricles - so stretching of cardiac myocytes on filling
what is afterload
the pressure left in the ventricle needed to overcome to pump blood out on systole
how do you work out cardiac output
HR x stroke volume
what is ejection fraction
amount of blood pumped out of the heart with each contraction
what is stroke volume
amount of blood pumped out of the left ventricle in one contraction
what is end diastolic volume
amount of blood in the ventricles at the end of diastole
what is end systolic volume
amount of blood left in the ventricles at the end of systole
how does left ventricular hypertrophy show up on ECG
left axis deviation
T wave inversion in leads 1, avl and v5 and v6
how does right ventricular hypertrophy look on ECG
right axis deviation
very tall R waves in v1-v3
T wave inversion in leads v1-v3
Management of chronic heart failure (essential drugs)
Ace - i
beta blocker
Aldosterone antagonist! spironolactone / epelerone
Loop diuretic - furosemide
ABAL
which type of anti hypertensive should be avoided in patients with valvular heart disease unless indicated by a specialist
ace inhibitors
what are the 3 typical anginal symptoms
heavy chest pain
on exertion
relieved by rest or GTN
when would you use the word atypical angina
when less than 3 of the typical symptoms arent met (so for example might be heavy chest pain thats not relieved by rest or GTN)
what 3 tests would you consider to investigate angina
- ECG
- CT coronary angiography
- exercise ECG
- bloods such as FBC to look for things that might be exacerbating symptoms
management of stable angina
- GTN for symptom relief
- prevention with beta blocker and aspirin
- if not controlled with betablocker can add a calcium channel blocker eg mod release nifedipine
- if doesn’t tolerate beta blocker can switch to CCB such as verapamil or dilitazem as a monotherapy only as these types of CCB’s cant be used alongside beta blockers due to the risk of complete heart block
initial management of ACS
- GTN
- 300mg aspirin
- IV morphine if in pain
what is the criteria for Primary PCI in ACS
- must be within 12 hours of symptom onset
- and must be able to be done within 120 minutes of the time when fibrinolysis could have been done
what drugs are used for fibrinolysis in ACS
alteplase
streptokinase (old)
which antiplatelet should be given if the patient is going for PCI
prasugrel
which antiplatelet should be given if patient is being treated for ACS with fibrinolysis
ticagrelor
which antiplatelet should be given if patient is having ACS but is already on an anticoag or has an increased bleeding risk
clopidogrel
NSTEMI treatment
if low GRACE score then conservative with batman
if high risk then PCI within 4 days of admission
BATMAN beta blockers aspirin ticagrelor morphine anticoag (fondaparinoux) nitrates (GTN)
TTO drugs post - MI
6 x A’s
Aspirin
another antiplatelet (ticagrelor, prasugrel or clopidogrel)
atenolol (or other b blocker)
antihypertensive
atorvastatin
aldosterone antagonist in pts with signs of heart failure (eplerenone)
what is dresslers syndrome
a complication of MI that occurs 2-3 weeks post MI.
causes a pericarditis
what type of scar will a pt have if they have had a valve replacement
midline sternotomy or right sided mini sternotomy
name 3 complications of a valve replacement
infective endocarditis
thrombotic emboli
haemolysis (from churning through the valve) = anaemia
what is the INR target for patients post mechanical valve insertion
2.5 - 3.5
what is a TAVI
transcatheter aortic valve insertion
what is TAVI used for
severe aortic stenosis in patients who are too high risk for open heart surgery
how does a mitral valve prolapse present
usually has a weird genetic disorder
atypical chest pain
new palpitations
mid systolic click on examination
symptoms of dresslers syndrome
low grade fever pericardial rub chest pain (pleuritic) 2-3 weeks post - mi can present as a pericardial tamponade
management of dresslers syndrome
NSAIDS
steroids
pericardiocentesis if pericardial effusion
name 3 renal causes of secondary hypertension
adult polycystic kidney disease
glomerulonephritis
renal artery stenosis
name 3 endocrine causes of secondary hypertension
conns syndrome (primary hyperaldosteronism) phaeochromocytoma cushings congenital adrenal hyperplasia acromegaly
name the 2 criteria for diagnosing hypertension
- systolic over 140 persistently on clinic readings
2. average 24 hr bp >135
investigating the cause of hypertension
- U+E
- lipids
- hba1c
how do you diagnose hypertension
24 hour BP monitor
what drug would you use to control HTN in a pregnant or breastfeeding woman
labetalol
what 1st line drug would you use to control hypertension in a diabetic patient
ace inhibitor / arb
what 1st line drug would you use to treat hypertension in an under 55 year old otherwise healthy pt
ace inhibitor / arb
which drug would you use 1st line to treat hypertension in a person of black ethnicity
calcium channel blocker
what drug would you use first line to control hypertension in a patient over the age of 55
calcium channel blocker
what drug would you add next in a patient already on an ace inhibitor
calcium channel blocker
what drug would you add next in a patient already on a CCB
ARB if black
ace inhibitor otherwise
what drug would you add next in a patient already on and ace inhibitor and CCB
thiazide like diuretic eg indapamide
what drug would you add next in a patient already on an ace inhibitor, CCB and indapamide with a potassium <4.5
low dose spironolactone
which two antihypertensives should you never combine
ARB and ace inhibitor
what drug would you add next in a patient already on an ace inhibitor, CCB and indapamide with a potassium >4.5
either an alpha blocker eg doxazocin
or beta blocker eg bisoprolol
what is resistant hypertension
when HTN is failed to be controlled by 3 + drugs
what investigations would you order to rule out ACS
- ECG
- cardiac enzymes - troponin, CK, LDH
- pci angiography
- look for cause eg TFT, U+E, FBC, glucose, lipids
- echo post procedures
which 3 cardiac enzymes can indicate ischaemia
troponin
LDH
Creatinine kinase
STEMI on ECG
ST elevation
or new LBBB
name 3 causes of aortic stenosis
calcification with age
rheumatic heart disease
bicuspid valve
what is the most common cause of aortic stenosis
calcification with age
presentation of symptomatic aortic stenosis
SOBOE syncope on exertion ejection systolic murmur CCF anginal pain
signs of aortic stenosis on examination
ejection systolic murmur heart loudest over aortic area (left 3rd intercostal, sternal border), radiates to carotids heaving apex beat slow rising pulse narrow pulse pressure aortic thrill
murmur heard in aortic stenosis
ejection systolic
what investigations would you do to diagnose aortic stenosis
- ecg
- echo - diagnostic
- cxr
management of aortic stenosis
valve replacement
TAVI if not fit enough for open surgery
what is demussets sign and what is it seen in
head bobbing along with pulse in aortic regurg
what is quinckes sign and what is it seen in
pulsating capillaries in nail bed - aortic regurg
management of aortic regurg
optimise BP
monitor with echo ev 6-12 months
definitive - valve replacement
tx underlying cause eg if caused by dissection
indications for surgery in aortic stenosis
aortic dilation
severe symptomatic regurg
enlarging LV
deteriorating LV function
what murmur is heard in mitral regurg
pan systolic
name 4 causes of mitral regurg
infective endocarditis rheumatic heart disease annular calcification in the elderly dilated left ventricle eg cardiomyopathy ruptured chordinae tendinae
symptoms of mitral regurg
SOB, palpitations, fatigue
heart failure
pansystolic murmur
can cause atrial fibrillation !!
investigations in mitral regurg
ECG - look for AF , LV dilatation / hypertrophy
echo - diagnostic / can look at LV function
cardiac catheterisation to confirm
management of mitral regurg
- rate control if AF
- anti coag
- valve repair / replacement surgery
- diuretics for heart failure symptoms
name the most common cause of mitral stenosis
rheumatic heart disease
presentation of mitral stenosis
symptoms are due to pulmonary hypertension caused by the stiff mitral valve = blood backs up into pulmonary vein..
SOB
haemoptysis
hoarse voice if pulm vessel enlargement
dysphagia if pulm vessel enlargement
mallar flush
mid diastolic rumbling murmur with loud S1
can cause AF due to strain on left atrium
signs of mitral regurg on examination
pansystolic murmur heard loudest over mitral area and radiates to axilla
what murmur is heard in mitral stenosis
mis diastolic rumbling murmur
describe 1st degree heart block
progressive PR prolongation but doesnt drop a QRS
describe 2nd degree heart block
2 types
mobitz 1 and mobitz 2
mobits 1 is where PR gets progressively longer until it drops a QRS
mobitz 2 is where a QRS will drop every couple of beats so will get a set number of P’s and then a dropped QRS in ratio
describe 3rd degree heart block
complete heart block so no atrial signals transferred to ventricles so P waves and QRS’s totally independent of eachother
management of bradycardia
- IV access, o2 if required, BP monitoring
- check for cause so electrolyte levels, digoxin levels
- if patient has adverse signs eg unstable or shock or ischemia then give IV atropine
- if patient has no adverse signs and low risk of asystole then just observe
- if patient still bradycardic can give atropine every 3-5 mins whilst anaesthetist on the way, can use adrenaline and also transcutaneous pacing
what drugs can be used to increase heart rate in brady cardic patients
atropine
adrenaline
name causes of heart block
fibrosis electrolyte disturbance drug interactions post-MI (usually inferior MI) aortic valve disease hypothermia
how do you manage torsades des pointes
IV magnesium sulphate
name 4 causes of long QT syndrome
inherited hypokalaemia low magnesium antipsychotics amiodarone macrolide antibiotics
name 3 drugs that prolong the QT
antipsychotics
macrolides
amiodarone
management of complete heart block
implantable pacemaker
management of long QT syndrome
if inherited then implantable defib
beta blockers
what are the two shockable rhythm’s
VT
VF
two non shockable rhythms
PEA
asystole
SVT management
- continuous ECG, o2, IV access
- vagalmanouvers
- adenosine if SVT
- can give another 2 x bolus if doesn’t work
- if sinus rhythm not achieved check for atrial flutter (can be un masked by adenosine) and seek expert help
- if atrial flutter seen after adenosine start beta blocker
management of fast AF
- continuous ECG, O2, IV access
- if patient unstable cardiovert +/- amiodarone
- if patient stable then do rate control with bisoprolol or dilitazem
- if started less than 48 hours ago then you can opt for rhythm control with flecanide or amiodarone but if unsure when started would need to anticoagulate for at least 3 weeks before doing rhythm control
how does WPW show up on an ECG
- delta wave (sloped up on QRS)
- short PR interval
- wide QRS
what is the pathway called in wolf parkinson white
bundle of kent
how do you manage wold parkinson white
radiofrequency abalation
what medications are contraindicated in WPW
rate and rhythm control because they increase the risk of developing a chaotic pattern AF, polymorphic wide QRS tahcycardias
what score is used to determine the need for anticoagulation in chronic AF
CHA2DS2VASC
what are the components of CHA2DS2VASC
congestive cardiac failure hypertension age 64-75 / over 75 diabetes stroke / tia vascular disease sex female
when is flecanide contraindicated for rhythm control
structural heart disease
what drugs can be used for rhythm control in fast AF that started less than 48 hours ago
dc cardioversion
flecanide
amiodarone
(always give heparin before)
management of fast AF that started more than 48 hours ago
rate control with bisoprolol
when can you use digoxin for rate control in chronic AF
if a beta blocker, rate limiting calcium channel blocker have both failed
last option for controlling chronic AF that has failed to be controlled by beta blocker, CCB and digoxin
amiodarone
symptoms of AF
palpitations SOB syncope dizziness chest pain
name 4 causes of irregularly irregular rhythm
- AF
- atrial flutter with heart block
- multifocal atrial tachycardia (common in COPD)
- sinus arrhythmia
name 5 causes of a regularly irregular rhythm
sinus tachy focal atrial tachy atrial flutter AV nodal re-entry tachy (SVT) junctional tachy
what is focal atrial tachycardia
where some random atrial cells decide to act as a pacemaker and emit impulses
what is atrial flutter
where electrical impulses circle around the atria and flutters at a rate of >330 per min
AV node still manages to pass on some of these impulses and the ventricular rate will always be in multiples of 300 eg 150, 75
name 5 causes of pericarditis
viral - coxsackie B TB malignancy hypothyroid uraemia post-MI dresslers syndrome connective tissue disease
most common viral organism causes pericarditis
coxsackie B
presentation of pericarditis
pleuritic chest pain SOB low grade fever palpitaitons tachycardia tachypnoea
describe pleuritic chest pain
sharp chest pain
worse on deep inspiration
relieved by sitting forward
what investigations would you do in suspected pericarditis
- ECG
- transthoracic echo - look for effusion etc
- exclude differentials eg MI cardiac enzymes, U+E
- look for cause - TFT’s, sputum culture, CXR,
ecg findings in pericarditis
global saddle shaped ST elevation
how do you treat pericarditis
NSAIDS to be tapered down over a couple of weeks to reduce recurrence rate
colchicine for 3 months
presentation of cardiac tamponade
becks triad - raised jvp, low BP and muffled heart sounds pulsus paradoxus tachy SOB absent Y in JVP
what is becks triad in cardiac tamponade
low bp
raised JVP
muffled heart sounds
management of cardiac tamponade
urgent pericardiocentesis
what is constrictive pericarditis
where pericardium becomes stiff from inflammation causing it to compress the heart = diastolic heart failure
symptoms of constrictive pericarditis
right heart failure - raised JVP, peripheral oedema, hepatomegaly
SOB
kaussmall sign
what is kaussmall sign
paradoxical increase in JVP with inspiration - seen in constrictive pericarditis
what investigations would you do to diagnose constrictive pericarditis
- ECG
- ECHO
- CXR - shows pericardial calcification
how would you manage constrictive pericarditis
more a chronic problem so not immediately life threatening so can do pericardectomy at some point to prevent diastolic heart failure
what would you expect the PT and APTT to be like in a patient on warfarin
PT be prolonged because warfarin acts on extrinsic pathway
what would you expect the PT and APTT to be like in a patient on warfarin
PT be prolonged because warfarin acts on extrinsic pathway (play tennis outside)