cardiology Flashcards
Dressler’s syndrome
post MI pericarditis
ECG changes in pericarditis
global/widespread,
‘saddle-shaped’ ST elevation
PR depression: most specific ECG marker for pericarditis
Mx pericarditis
acute pericarditis should have transthoracic echocardiography
treat the underlying cause
a combination of NSAIDs and colchicine
ECG leads and territories
see screenshot
when is adenosine used
terminate SVTs
when is amiodarone used
Amiodarone is a class III antiarrhythmic agent used in the treatment of atrial, nodal and ventricular tachycardias
eg rate limiting ca channel blockers
verapamil, diltiazem
which 2 cardio meds can cause complete heart block if taken together
beta-blockers and verapamil
ARB examples
candesartan
losartan
irbesartan
causes of aortic dissection
hypertension: the most important risk factor
trauma
bicuspid aortic valve
collagens: Marfan’s syndrome, Ehlers-Danlos syndrome
Turner’s and Noonan’s syndrome
pregnancy
syphilis
Aortic dissection symptoms
chest/back pain
pulse deficit
aortic regurgitation
hypertension
the majority of patients have no or non-specific ECG changes. In a minority of patients, ST-segment elevation may be seen in the inferior leads
types aortic dissection
Stanford classification
type A - ascending aorta, 2/3 of cases
type B - descending aorta, distal to left subclavian origin, 1/3 of cases
gold standard aortic dissection Ix
- CT angiography of the chest, abdomen and pelvis is the investigation of choice
suitable for stable patients and for planning surgery
a false lumen is a key finding in diagnosing aortic dissection - Transoesophageal echocardiography (TOE)
more suitable for unstable patients who are too risky to take to CT scanner - CXR can be also done- shows widened mediastinum (or loss of aortic knob)
atrial flutter ecg findings
saw tooth
management atrial flutter
Management
is similar to that of atrial fibrillation although medication may be less effective
atrial flutter is more sensitive to cardioversion however so lower energy levels may be used
radiofrequency ablation of the tricuspid valve isthmus is curative for most patients
Atrial myxoma most common chamber
LA
Atrial septal defects symptoms
which type more common?
Features
ejection systolic murmur, fixed splitting of S2
embolism may pass from venous system to left side of heart causing a stroke
ostium secundem more common
types of heart block and symptoms and ecg
- first degree heart block: Prolonged PR >0.2secs, asymptomatic usually and o tx needed
- mobitz1 wenkebach: increasing pr interval until missed beat
mobitz 2: constant PR interval but P often not followed by QRS - complete heart block there is no association between the P waves and QRS complexes
atropine use
bradycardia
Bivalirudin
Bivalirudin is a reversible direct thrombin inhibitor used as an anticoagulant in the management of acute coronary syndrome.
Brugada syndrome
CFs
Tx
inherited cardiovascular disease with may present with sudden cardiac death.
autosomal dominant fashion
mutation in the SCN5A gene
ECG shows convex ST elevation in V1-V3 with a partial right bundle branch block
Mx= ICD
becks triad
cardiac tampondade:
- hypotension
- muffled heart sounds
- raised JVP
other symptoms of cardiac tamponade (inc becks traid)
pulsus paradoxus - an extra large drop in BP during inspiration
Kussmaul’s sign - much debate about this
ECG: electrical alternans
management cardiac tamponade
Management
urgent pericardiocentes
Leading cause of sudden cardiac death in young athletes
Hypertrophic obstructive cardiomyopathy
Right ventricular myocardium is replaced by fatty and fibrofatty tissue
Arrhythmogenic right ventricular dysplasia
Tx= ICD and sotalol , catheter ablation
Catecholaminergic polymorphic ventricular tachycardia
inherited cardiac disease associated with sudden cardiac death.
autosomal dominant fashion and has a prevalence of around 1:10,000.
- defect in the ryanodine receptor (RYR2)
Mx Management
beta-blockers
implantable cardioverter-defibrillator
Coarctation of the aorta
Coarctation of the aorta describes a congenital narrowing of the descending aorta.
Complete heart block symptoms
syncope
heart failure
regular bradycardia (30-50 bpm)
wide pulse pressure
JVP: cannon waves in neck
variable intensity of S1
systole or diastole when coronary arteries fill?
The coronary arteries fill during diastole.
prolonged QT interval on ECG?
hypocalcemia
causes L axis deviation
left anterior hemiblock
left bundle branch block
inferior myocardial infarction
Wolff-Parkinson-White syndrome* - right-sided accessory pathway
hyperkalaemia
congenital: ostium primum ASD, tricuspid atresia
minor LAD in obese people
causes RAD
right ventricular hypertrophy
left posterior hemiblock
lateral myocardial infarction
chronic lung disease → cor pulmonale
pulmonary embolism
ostium secundum ASD
Wolff-Parkinson-White syndrome* - left-sided accessory pathway
normal in infant < 1 years old
minor RAD in tall people
digoxin ecg changes
ECG features
down-sloping ST depression (‘reverse tick’, ‘scooped out’)
flattened/inverted T waves
short QT interval
arrhythmias e.g. AV block, bradycardia
ECG: hypokalaemia
ECG features of hypokalaemia
U waves
small or absent T waves (occasionally inversion)
prolong PR interval
ST depression
long QT
ECG: hypothermia
The following ECG changes may be seen in hypothermia
bradycardia
‘J’ wave (Osborne waves) - small hump at the end of the QRS complex
first degree heart block
long QT interval
atrial and ventricular arrhythmias
LBBB AND RBBB ECG
in LBBB there is a ‘W’ in V1 and a ‘M’ in V6
in RBBB there is a ‘M’ in V1 and a ‘W’ in V6
WHICH TYPe of BBB is always pathological
new LBBB always pathological
S1Q3T3’)
PE
Inverted T waves CAUSES
myocardial ischaemia
digoxin toxicity
subarachnoid haemorrhage
arrhythmogenic right ventricular cardiomyopathy
pulmonary embolism (‘S1Q3T3’)
Brugada syndrome
Eisenmenger’s syndrome
- which conditions cause it
reversal of a left-to-right shunt in a congenital heart defect due to pulmonary hypertension.
- ventricular septal defect
atrial septal defect
patent ductus arteriosus
symptoms eisenmengers syndrome
Tx
original murmur may disappear
cyanosis
clubbing
right ventricular failure
haemoptysis, embolism
Tx= heart and lung transplant
when are exercise tolerance tests used
- suspected angina
- risk stratifying patients post MI
- risk stratifying pts with hypertrophic cardiomyopathy
Causes of a loud S1
mitral stenosis
left-to-right shunts
short PR interval, atrial premature beats
hyperdynamic states
Causes of a quiet S1
mitral regurgitation
Hypercalcaemia: features
‘bones, stones, groans and psychic moans’
corneal calcification
shortened QT interval on ECG
hypertension
Hypertension in pregnancy in usually defined as:
systolic > 140 mmHg or diastolic > 90 mmHg
OR
Blood pressure classification
Stage 1 Clinic BP >= 140/90 mmHg and subsequent ABPM daytime average or HBPM average BP >= 135/85 mmHg
Stage 2 Clinic BP >= 160/100 mmHg and subsequent ABPM daytime average or HBPM average BP >= 150/95 mmHg
Severe hypertension Clinic systolic BP >= 180 mmHg, or clinic diastolic BP >= 120 mmHg
Infective endocarditis causes and organisms- which org most common?
Staphylococcus aureus
-most common cause
- IVDUs
Streptococcus viridans
-dental procedures
- streptococcus sanguinis and streptococcus mitis
coagulase-negative Staph such as Staphy epidermidis
- valve surgery
Strep bovis
- colorectal ca
Infective endocarditis- duke criteria - MAJOR criteria
- Positive blood cultures
- Echo signs (veg, abscess etc)
- new regurg murmur
Infective endocarditis treatment- initial blind therapy
Initial blind therapy
- NATIVE VALVE: amox
PEN allergic- vanc and gent
If prosthetic valve
vancomycin + rifampicin + low-dose gentamicin
JVP wave order
ACXVY
Kawasaki disease
Features
high-grade fever which lasts for > 5 days. Fever is characteristically resistant to antipyretics
conjunctival injection
bright red, cracked lips
strawberry tongue
cervical lymphadenopathy
red palms of the hands and the soles of the feet which later peel
Mx kawasaki disease
- high-dose aspirin
- IV immunoglobulin
- echocardiogram -is used as the initial screening test for coronary artery aneurysms
What type of murmurs are benign
systolic
AORTIC STENOSIS
is the aortic valve usually tri or bileaflet
tricuspid
Aortic stenosis
causes
symptoms
signs
treatment
causes: age related calficication, congential bicuspid valve, post rheumatic
SYMPTOMS: SOBOE, syncope, LV dysfunction,
SIGNS:
ejection systolic murmur, slow rising pulse, narrow pulse pressure, S4, split A2.
Tx: if symptomatic- surgery
Aortic regurgitation
causes
symptoms
signs
treatment
causes: post rheumatic fever, HTN, syphylis, Ank spon, infective endocarditis, AORTIC DISSECTIOn
symptoms
SOB, LV failure, infective endocarditis not responsive to treatment, enlarged heart
signs,
lengthening diastolic murmur, pistol shot femorals, de quinckes, de musset, collapsing radial pulse
tx= prompt surgery
eponymous signs assosciated with AR
see album on phone
cyanotic or acyanotic?
ASD
acyanotic
cyanotic or acyanotic?
ToF
cyanotic
cyanotic or acyanotic
VSD
acyanotic
cyanotic or acyanotic
CoA
acyanotic
cyanotic or acyanotic
PDA
acyanotic
cyanotic or acyanotic
ebstiens anomaly
- what type of murmur does ebsteins anomaly cause
causes TR
cyanotic
cyanotic or acyanotic
transposition of great vessels
cyanotic
cyanotic or acyanotic
hypoplastic left heart
cyanotic
acyanotic heart disease with shunt
ASD, VSD, PDA, CoA
cyanotic disease without shunt
congen AS, CoA
cyanotic disease with shunt
ToF, ebsteins anomaly, complete transposition of great vessels,
acyanotic disease without shunt
lefy hypoplastic heart, pulmonary antresia, pulmonary stensis, tricuspid atresia
ASD signs , what is shown on ecg
ASD- split HS2 , Left parasternal heave
types of ASD, which is more common, ECG findings for both
- Secundem= most common , ECG shows RBBB, RAD, AFFETCS MITRAL VALVE
- primium- affects AV valve, ecg shows RBBB
VSD- what type of shunt
Left- right shunt
what type of murmur VSD
pansystolic if a large VSD
Ejection systolic if small VSD
which congenital heart defect causes machinery murmur
PDA
PDA- signs
prem babies
wide pulse pressure
bounding pulse
left subclavicular thrill,
machinery murmur
when is prostaglandin given in congenital heart defects and WHY
prostaglandin prevents the natural closing of DA- to allow blood flow in TGA, hypoplastic left heart syndrome, CoA
ebsteins anomaly: causes, symptoms
Low insertion of the tricuspid valve resulting in a large atrium and small ventricle.
ass’d with:
patent foramen ovale/ ASD
White syndrome
lithium
signs:
prominent a wave
RBBB, WOLF parkinson white syndrome, cyanosis, pansystolic murmur, tricuspid regurg
Ebstein’s anomaly → tricuspid regurgitation → pansystolic murmur, worse on inspiration
how soon can drive after permanent pacing
1 week
warfarin management of INR (when to stop, hold, give vit k)
see phone screenshot
intervention of choice for severe mitral stenosis
Percutaneous mitral commissurotomy
BNP - actions:
vasodilator: can decrease cardiac afterload
diuretic and natriuretic
suppresses both sympathetic tone and the RAAS