Cardiology Flashcards
What is the management of a major bleed while on warfarin?
Stop warfarin
Give IV vit K 5mg and prothrombin complex concentrate
What antibiotics should statins bet stopped on?
Macrolides
If a patient is on monotherapy for angina and cannot tolerate the addition of a calcium channel blocker or a beta-blocker then consider one of the following drugs:
a long-acting nitrate
ivabradine
nicorandil
ranolazine
Adverse effects of thiazide diuretics
Dehydration
Postural hypothension
Hyponatremia, hypokalaemia, hypercalcaemia
Gout
Impaired glucose tolerance
Impotence
When is arenaline used in cardiac arrest
Non shockable rhythm or if in shockable rhythm but 3 unsuccessful shocks
What score must be calculated in patients with an NSTEMI?
GRACE score
If above 3% do a coronary angiography within 72 hours
Management if Wells score more than 4
Immediate CTPA or interim anticoagulation whist awaiting CTPA
MI complication that presents with acute HF secondary to a cardiac tamponade?
Left ventricular free wall rupture
Management of acute stroke in the absence of haemorrhage?
Anticoagulation therapy should be commenced after 2 weeks. Antiplatelet therapy should be given in the intervening period. If imaging shows a very large cerebral infarction then the initiation of anticoagulation should be delayed
Side effects of beta blockers?
bronchospasm
cold peripheries
fatigue
sleep disturbances, including nightmares
erectile dysfunction
Cytochrome p450 and warfarin
Inhibitors of the cytochrome P450 system leads to accumulation of warfarin and causes the INR to increase.
How can constrictive pericarditis be differentiated from cardiac tamponade
Cardiac tamponade has pulsus paradoxus (an abnormally large drop in BP during inspiration)
Constrive pericarditis has Kussmaul’s sign
What is third degree heart block?
No association between the P waves and the QRS complexes
What is Buerger’s disease?
Small and medium vessel vasculitis that is strongly associated with smoking.
Pneumonic for hypertension medication in over 55?
Old people like CATs
Calcium blocker
ACE/ARB
Thiazide-like diuretic
What is Dressler’s syndrome?
Autoimmune reaction against antigenic proteins formed as the myocardium recovers. It is characterised by a combination of fever, pleuritic pain,
When does acute mitral regurgitation happen post MI?
More common with infero-posterior infarction and may be due to ischaemia or rupture of the papillary muscle.
Immediate treatment of bradychardia?
500mg atropine
What is eisenmenger’s syndrome?
reversal of a left-to-right shunt in a congenital heart defect due to pulmonary hypertension
What is malignant hypertension?
severe hypertension and bilateral retinal hemorrhages and exudates
Causes of LBBB
Heart issues
Causes of LBBB
Heart issues
Causes of RBBB
Lung things
What shoudl you think when you see a global T wave inversion?
Think non cardiac causes of abnormal ECG
Kussmals sign?
JVP increasing with inspiration
Most specific ECG change for pericarditis?
PR depression
What is bifasicular block?
combination of RBBB with left anterior or posterior hemiblock
What is trifasicular block
combination of RBBB with left anterior or posterior hemiblock and first degree heart block
What is Wolff Parkinson White syndrome?
caused by a congenital accessory conducting pathway between the atria and ventricles leading to a atrioventricular re-entry tachycardia
Possible ECG features of WPW?
short PR interval
wide QRS complexes with a slurred upstroke - ‘delta wave’
left axis deviation if right-sided accessory pathway*
right axis deviation if left-sided accessory pathway*
What should be started following a TIA?
anticoagulation for AF should start immediately once imaging has excluded haemorrhage
Main ECG abnormality in hypercalcaemia?
Shortening of the QT interval
What is Wellen’s syndrome
ECG pattern that is typically caused by high-grade stenosis in the left anterior descending coronary artery.
Treatment of torsades de points?
IV magnesium sulfate
What foods should patients taking warfarin avoid?
Foods high in Vitamin K
Acute management of SVT
Vagal manoeuvres
IV adenosine (6mg, 12mg, 18mg)
Electrical cardioversion
Contraindication to statins?
Macrolides
Pregnancy
In ACS when should nitrates not be used>?
If the patient is hypotensive
Inheritance pattern of hypertrophic obstriuctive cardiomyopathy
Autosomal domainant
What is arrhythmogenic right ventricular cardiomyopatjhy?
Autosomal domiannt condition where the right ventricular myocardium is replaced by fatty and fibrofatty tissue
ECG chnges of arrhythmogenic right ventricular cardiomyopathy?
T wave inversion in leads V1-3V3 without the presence of a RBBB
What is Wellen’s syndrom?
ECG pattern that is typically caused by high grade stenosis in the left anterior descending coronary artery
ECG features of Wellen’s syndrome?
Biphasic or deep T wave inversion in V2-3
Minimal STEMI
No Q waves
What is BNP?
hormone produced mainly by the left ventricular myocardium in response to strain.
What kind of medication is indapamide?
Thiazide like diuretic
ACS inital drug therapy
MONA
Morphine if severe pain
Oxygen if sats below 94
Nitrates- If ongoing chest pain
Aspirin 300mg
Side effects of warfarin
Haemorrhage
Teratogenuc
Skin necrosis
Purple toes
Rate control in AF
BB
CCB
Digoxin
What medication reverses efffecgs of dabigatran?
Idarucixumab
What is arrhythmogenic right ventirvcular cardiomyopathy?
Inherited cardiovascular disease which may present sith sudden cardiac death
ECG abnormalities in arrhythmogenic right ventricular cardiomyopathy?
V1-3, typically T wave inversion. An epsilon wave is found in about 50% of those with ARV - this is best described as a terminal notch in the QRS complex
When is pulsus paradoxus found?
Severe asthm
Cardac tamponade
Investigations for takyusa arteritis?
vascular imaging of the arterial tree is required to make a diagnosis of Takayasu’s arteritis
either magnetic resonance angiography (MRA) or CT angiography (CTA)
Why would hypertrophic obstructive cardiomyopathy cause sudden death most commonly?
Ventricular arrhythmias
Features of hypercalcaemia?
‘bones, stones, groans and psychic moans’
corneal calcification
shortened QT interval on ECG
hypertension
First line for HF?
Ace-I and BB
What valve is most commonly affeted in IE?
Tricuspid valve
What is takotsubo cardiomyopathy?
Type of non-ischaemic cardiomyopathy associated with a transient, apical ballooning of the myocardium. It may be triggered by stress.
Most common cause of mitral stenosis?
Rheumatic fever
What are features of aortic regurgitiation?
early diastolic murmur: intensity of the murmur is increased by the handgrip manoeuvre
collapsing pulse
wide pulse pressure
Quincke’s sign (nailbed pulsation)
De Musset’s sign (head bobbing)
mid-diastolic Austin-Flint murmur in severe AR - due to partial closure of the anterior mitral valve cusps caused by the regurgitation streams
Mneumonic for mumurs louder on inspiration and expiration?
RILE
Right inspiration
Left expiration
Mneumonic for minor criteria for Duke’s
FIVEMP
F - Fever
I - Immunological phenomena (Oslers, nodes, Roth spots, GN, Rh Factor)
V - Vascular phenomena (arterial embolisation, mycotic aneurism, Janeway lesions)
E - Echocardiographic evidence not meeting dukes
M - Microbiological evidence not meeting dukes
P - Predisposition
Presentation of left ventricular free wall rupture?
Acute heart failure secondary to cardiac tamponade (raised JVP, pulsus paradoxus, diminished heart sounds).
Best first line for 45 YO male for hypertension but he has renovascular disease?
Amlodipine (CCB)
Agents with proven efficacy in the pharmacological cardioversion of atrial fibrillation
amiodarone
flecainide (if no structural heart disease)
others (less commonly used in UK): quinidine, dofetilide, ibutilide, propafenone
What things are mitral valve prolapse associated with?
congenital heart disease: PDA, ASD
cardiomyopathy
Turner’s syndrome
Marfan’s syndrome, Fragile X
osteogenesis imperfecta
pseudoxanthoma elasticum
Wolff-Parkinson White syndrome
long-QT syndrome
Ehlers-Danlos Syndrome
polycystic kidney disease
How long should CPR be continued after giving a thrombolytic drug?
60-90 minutes
ECG findings in PE?
the classic ECG changes seen in PE are a large S wave in lead I, a large Q wave in lead III and an inverted T wave in lead III - ‘S1Q3T3’. However, this change is seen in no more than 20% of patients
right bundle branch block and right axis deviation are also associated with PE
sinus tachycardia may also be seen
First line for over 55 but got diabetes?
AceI or ARB
Co-administration of sacubitril (a neprilysin inhibitor) with an ACE inhibitor can cause what?
otentiates the levels of plasma bradykinin as they both inhibit bradykinin degradation, resulting in a higher risk of angioedema. In order to reduce this risk a 36 hour washout period is required to prevent the accumulation of bradykinin.
BP drop that can be used to diagnose orthostatic hypotension?
there is a drop in SBP of at least 20 mmHg and/or a drop in DBP of at least 10 mmHg after 3 minutes of standing
Pathophysiology of hypertrophic obstructive cardiomyopathy?
the most common defects involve a mutation in the gene encoding β-myosin heavy chain protein or myosin-binding protein C
results in predominantly diastolic dysfunction
left ventricle hypertrophy → decreased compliance → decreased cardiac output
characterized by myofibrillar hypertrophy with chaotic and disorganized fashion myocytes (‘disarray’) and fibrosis on biopsy
What is hypertrophic obstructive cardiomyopathy associated with?
Friedreich’s ataxia
Wolff-Parkinson White
Side effects of Ace-i
cough- occurs in around 15% of patients and may occur up to a year after starting treatment. thought to be due to increased bradykinin levels
angioedema: may occur up to a year after starting treatment
hyperkalaemia
first-dose hypotension: more common in patients taking diuretics
How long are provoked PEs treated for?
3 months
Beck’s triad?
hypotension
raised JVP
muffled heart sounds
What medication should not be used in VT?
Verapamil
Why does a narrow pulse pressure occur?
happens when your heart isn’t pumping enough blood, which is seen in heart failure and certain heart valve diseases
What type of arrhythmia is long QT associated with?
Torsades
ECG findings in PE?
the classic ECG changes seen in PE are a large S wave in lead I, a large Q wave in lead III and an inverted T wave in lead III - ‘S1Q3T3’. However, this change is seen in no more than 20% of patients
right bundle branch block and right axis deviation are also associated with PE
sinus tachycardia may also be seen
Adverse effects of nicorandil?
headache
flushing
skin, mucosal and eye ulceration
gastrointestinal ulcers including anal ulceration
What is S4?
results from the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, indicating failure of the left ventricle
What is a stroke-Adams attack?
Collapse without warning, associated with loss of consciousness for a few seconds[1]. Typically, complete (third-degree) heart block is seen on the ECG during an attack (but other ECG abnormalities such as tachy-brady syndrome have been reported
How can dabigatran effects be reversed?
Idarucizumab
Post Mi mneumonic
DABS
Dual antiplatelet therapy
AceI
BB
Statin
What is Wellen’s syndrome?
ECG pattern that is typically caused by high-grade stenosis in the left anterior descending coronary artery.
The patient’s pain may have resolved at the time of presentation and cardiac enzymes may be normal/minimally elevated.
ECG features
biphasic or deep T wave inversion in V2-3
minimal ST elevation
no Q waves
First line for bradycardia?
Atropine
Who should statins be given to QRISK score wise?
People with a 10 year cardiovascular risk over 10%
Features of an aortic regurgitation murmur?
Early diastolic murmur: intensity of the murmur is increased by the handgrip manoeuvre
Collapsing pulse
Wide pulse pressure
Quincke’s sign (nailbed pulsation)
De Musset’s sign (head bobbing)
Mid-diastolic Austin-Flint murmur in severe AR - due to partial closure of the anterior mitral valve cusps caused by the regurgitation streams
First line for angina pectoris?
Beta blocker of CCB
Adverse effects of thiazide diuretics?
dehydration
postural hypotension
hyponatraemia, hypokalaemia, hypercalcaemia*
gout
impaired glucose tolerance
impotence
Anteroseptal ECG changes and which coronary artery?
V1-V4
LAD
Inferior ECG changes and coronary artery?
II, III, aVF
RCA
Anterolateral ECG changes and coronary artery?
V1-V6, I, aVL
Proximal LAD
Lateral ECG changes and coronary artery
I, aVL, plus/minus V5-6
Left circumflex
Posterior ECG changes and coronary artery
Changes in. V1-3
Reciprocal changes of STEMI are seen:
Horizontal ST depression
Tall, broad R waves
Upright T waves
Dominant R wave in V2
Usually left circumfle, also RCA
How many seconds is 1 small square on an ECG?
0.04 seconds
How many seconds is 5 small squares on an ECG?
0.2 seconds
How many seconds is 5 large squares on an ECG?
1 second
Axis of p wave morphology
Upright in leads I and II. Inverted in aVR
Duration of a normal P wave
Less than 0.12s
What is the P wave morphology in V1?
Biphasic- Positive and negative deflections
What are the part of the P wave
First half is right depolarisation and secocnd part is left
What are the part of the P wave
First half is right depolarisation and secocnd part is left
What does the Q wave represent?
Normal left to right depolarisation of the interventricular septum
Pathological Q waves
More than 40 ms wide
More than 2mm deep
More than 25& of depth of QRS complex
Seen in leads V1-3
When should the loss of Q waves be considered abnormal
If in leads V5-6
This is most commonly due to LBBB
What are the 3 key R wave abnormalities?
Dominant R wae in V1
Dominant R wave in aVR
Poor R wave progreession
What leads are T waves upright?
All except aVR and V1
When are peaked T waves commonly seen?
Hyperkalaemia
When are broad, asymmetrically peaked T waves often seen?
In early stages of a STEMI
T wave inversion due to MI in contigous leads based on the anatomical location of the area of ischaemia/infarction
Inferior-
Lateral-
Anterior-
Inferior = II, III, aVF
Lateral = I, aVL, V5-6
Anterior = V2-6
In LBBB where is the T-wave inversion?
I, aVL and V5-6
In right bundle branch block where is the T wave inversion?
Right precordial leads in V1-3
Where do you get T wave inversion in LVH?
I, aVL an V5-6
Where do you get T wave inversion in RVH
Right precodial leas in V1-3 and also in the inferior leads (II,III and AVF)
Causes of biphasic T waves?
MI and hypokalaemia
What does a T phase due to ischaemia look like?
T waves goes up then down
What does a T wave due to hypokalaemia do?
T waves goes down then up
What is Wellens syndrome?
Wellens Syndrome is a clinical syndrome characterised by biphasic or deeply inverted T waves in V2-3, plus a history of recent chest pain now resolved. It is highly specific for critical stenosis of the left anterior descending artery (LAD)
Causes of prominent U waves?
Bradychardia and severe hypokalaemia
What is a J wave?
positive deflection seen at the J point in precordial and true limb leads. It is most commonly associated with hypothermia. These changes will appear as a reciprocal, negative deflection in aVR and V1.
What is the J point?
Point where the QRS complex joins the ST segment. It represents the approximate end of depolarization and the beginning of repolarization as determined by the surface ECG. There is an overlap of around 10ms.
What is a delta wave?
Slurred upstroke in the QRS complex. It relates to pre-excitation of the ventricles, and therefore often causes an associated shortening of the PR interval. It is most commonly associated with pre-excitation syndromes such as WPW.
What should you give to patients on warfarin undergoing emergency surgery?
Four factor prothrombin complex concentreate
GRACE score
age
heart rate, blood pressure
cardiac (Killip class) and renal function (serum creatinine)
cardiac arrest on presentation
ECG findings
troponin levels
Which patients with NSTEMI/unstable angina should have coronary angiography (with follow-on PCI if necessary)?
immediate: patient who are clinically unstable (e.g. hypotensive)
within 72 hours: patients with a GRACE score > 3% i.e. those at intermediate, high or highest risk
coronary angiography should also be considered for patients if ischaemia is subsequently experienced after admission
Mneumonic for rheumatic fever?
JONES
Joints
O (shaped as heart) pancarditis
N odules (subcutaneous)
E rythema marginatum
S ydenham chorea
What should you do when INR 5-8?
INR 5.0-8.0 (minor bleeding) - stop warfarin, give intravenous vitamin K 1-3mg, restart when INR < 5.0
SVT adenosine protocol?
Adenosine 6mg, then 12, then 18