MedReg+1 Bhuva ECGs
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Transcript of MedReg+1 Bhuva ECGs
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Developing people for health and healthcare
ECG workshop: the common and the dangerous
Anish BhuvaCardiology Academic Clinical FellowThe Heart Hospital
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Objectives
Acute coronary syndroms
Risk stratification
Management
MimicsSVTAFBroad complex tachycardia
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Format
3 ECG Booklets
ST segment elevation
NSTEACs
Arrhythmia
Brief small group discussion of each booklet followed by answers
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Pick up booklet 1
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Booklet 1
Decide whether to
Blue light, this is a primary!
Leave until the post-take round
Observe for now
5 minutes for 10 scenarios
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STEACS: diagnosis
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Inferior STEMI
Blue light to nearest PCI centre! Scenario 1
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Inferior STEMI
20% associated with CHB
Stablise prior to transfer!
Narrow QRS, Rate > 50 is safer
Will one dose atropine last an LAS transfer?Isoprenaline infusionTemporary pace + escort?
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Anterior STEMI
Blue light to nearest PCI centre! Scenario 2
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Medication in primary PCI
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Novel antiplatelet agents
Clopidogrel 600mg:Better outcomes only in PCI OASIS 7Less ‘resistance’/ non responsiveness ISAR- CHOICE OASIS
7No excess hazard (with fibrinolysis)Improved pharmacokinetics ARMYDA-2
Ticagrelor 180mg loading: PLATOTicagrelor > ClopidogrelCI: moderate hepatic dysfunction, previous haemorrhagic stroke
Prasugrel TRITONCI: age >75; low body weight; previous TIA/Stroke
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Admission ECG Scenario 3
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Repeat at 20 minutes
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Scenario 4
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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High take off
Scenario 4
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High take off
This patient was taken to the cath lab
Normal coronaries
Fixed ECG changes on repeat at 24 hours
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Scenario 5
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Early repolarisation
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Early repolarisation
1. J point elevation + concave ST elevation2. Peaked asymmetrical T waves with steeper descending element than ascending
Also:1. Variability with heart rate2. Young, male, Afro-Caribbean
History and clinical context (Pre test probability) important if unsure
(Provide copy of ECG on discharge)
Definition of Early Repolarization: A Tug of WarDerval et al Circulation 2011 Scenario 5
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Scenario 6
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Pericarditis
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Scenario 9
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Scenario 7
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Scenario 7
LV Aneurysm
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Scenario 8
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Q wave infarction
Scenario 8
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“Pain was worst two hours ago”
Assume this was the index episode
Candidate for emergency reperfusion
Extent of R wave voltage
“No chest pain, but I am breathless”
Cardiogenic shock
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Cardiogenic shock
Inotropes CASINOIABP
IABP- SHOCK IILVADReperfusion
SHOCK..ECMO
Is myocardium viable?• History• ECG• Echo• Clinical context
Escalate early: these are the difficult decisions balancing high risk and mortality
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Scenario 10
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a)Blue light, this is a primary!b)Observec)Discharge
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a)Blue light, this is a primary!b)Observec)Discharge
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Sgarbossa criteria
Look for concordant ST Elevation!
Sgarbossa et al Electrocardiographic diagnosis of evolving acute myocardialinfarction in the presence of left bundle-branch block. N Engl J Med 1996;334:481–487.
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Myth- busting
You can’t interpret a paced rhythm
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Truth
You can observe for dynamic changes
Use Sgarbossa’s criteria
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Pick up booklet 2
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Practice scenarios
Decide on the important diagnostic features and key management steps in the next ECG booklet
5 minutes for 9 scenarios
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NSTEACS
Scenario 1
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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NSTEACS
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Troponin
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Cardiac troponin I (cTnI) levels in a healthy reference population and in an acute coronary syndrome (ACS) population.
Mahajan V S , and Jarolim P Circulation. 2011;124:2350-2354
Copyright © American Heart Association, Inc. All rights reserved.
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How to use hs-Trop
Diagnosis
>99th centile at 3hours: • Sensitivity = c. 99%
<99th centile at 3 hours:• NPV > 95%
Risk stratification
Any level of + troponin is associated with a poor prognosis
BUT we are now picking it up in patients without an acute coronary syndrome
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“When troponin was a lousy assay it was a great test, but now that it's becoming a
great assay, it's getting to be a lousy test.”
Jesse RL. On the relative value of an assay versus that of a test: a history of troponin for the diagnosis of myocardial infarction. J Am Coll Cardiol. 2010;55:2125–2128
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NSTEACS
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Non ST Elevation Myocardial infarction
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NSTEACS
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50 year old femaleHR 75Moderate COPDTroponin riseSBP 120/80Creat 75No ST changes
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Risk scores
Risk Stratification (for NSTEACS)
Other models:• TIMI• ACC/AHA
http://www.outcomes-umassmed.org/grace/acs_risk/acs_risk_content.html
…may help with triage for invasive management
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NICE: NSTEACS guidance
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Risk scores
Risk Stratification (for NSTEACS)
Other models:• TIMI• ACC/AHA
http://www.outcomes-umassmed.org/grace/acs_risk/acs_risk_content.html
…may help with triage for invasive management
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Take home message
High sensitivity assays may give borderline false positive results
Risk scores are influenced by epidemiological as well as patient specific factors
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Scenario 2
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Developing people forhealth and healthcare
Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Developing people forhealth and healthcare
Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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ESC guidelines
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Left main stem ischaemia
ST elevation in aVR onlyInfero-lateral ST depression
“Whilst this does not qualify for primary PCI this patient, I am worried that this is main stem ischaemia”
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S
Scenario 8
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Developing people forhealth and healthcare
Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Developing people forhealth and healthcare
Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Wellen’s syndrome
Scenario 3
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Wellen’s syndrome
Chest pain (often intermittent)
Characteristic ECG:
Anterior T wave inversion
Bifid T waves
Normal Trop/Mildly elevatedNo established infarction
A sign of impending LAD occlusion and requires urgent intervention
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Scenario 4
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Would you:a) Discharge;b) Refer for angiography;c) Organise stress imaging.
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LVH + strain
Scenario 4
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Scenario 5
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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HCM
Scenario 5
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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RV infarction
Scenario 6
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Life in the fast lane.com
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RV infarction
V1 ST elevation V2 ST depressionIII>II ST elevation
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RV infarction: management
Maintain RV pre loadReduce afterload Restore A-V synchrony
Avoid nitrates! Cautious ACEi introduction
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Scenario 7
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Would you:a) Discharge after 48 hours ACS Rx;b) Refer for angiography;c) Organise stress imaging.
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THIS IS A STEMI!
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Posterior myocardial infarction
Scenario 7
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Posterior infarction
This is a STEMI
Dominant R in V1/2Anterior ST depression with upright T waves
Diagnosis: V7-9
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Pick up booklet 3
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Arrhythmia management
5 minutesRead through the next few scenarios and come up with a diagnosis and
management
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Would you:IV metoprololPO metoprololAmiodaroneFlecainide Shock
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Acute control
Drug Time to rhythm control/hrs
Time to rate control/hrs
Chance of cardioversion
Metoprolol 5 mins 13%
Sotalol 10-15%
Digoxin 2-6 hours 5%
Verapamil 0.5 5 mins 6-14%
Flecainide 1 67-92% at 6hrs
Amiodarone 6-24 6-8 hours 40-60% at 24 hrs
MgSO4 5-15 mins OR 1.6 (1.07-2.4)
Expect 50% conversion at 15-120minutes ESC Guidelines: Atrial FibrillationBraunwald’s Heart DiseaseESC textbook of cardiology
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Flecainide
Better than amiodarone for <24 hours duration of AF
Contraindicated in abnormal LV function and ischaemic heart disease
Risk of ‘paradoxical’ rate increase
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Tip
Echo for LV function useful prior to giving flecainide
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Would you:Urgent DCCVDCCV at 6 hoursVerapamilBetablockadeFlecainide
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Would you:Urgent DCCVDCCV at 6 hoursVerapamilBetablockadeFlecainide
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SVT
Sinus tachycardiaAtrial tachycardiaAVNRTAVRTParoxysmal junctional tachycardia
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AVNRT
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AVNRT
Stepwise approach:VagalAdenosineVerapamil 5-10mg IV [successful in 2 minutes in 90%]Betablockade less used as less effective but fineDigoxin possible with repeat vagal maneuvresDCCV should be used over flecainide etc.
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Would you:a) Adenosineb) DCCV c) Bisoprolold) Flecainide
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Would you:a) Adenosineb) DCCV c) Bisoprolold) Flecainide
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Atrial Flutter
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Take home message
Easy to DCCV flutter (50J)Difficult to rate control
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Broad complex tachycardia
If ischaemic heart disease, think:
VT
VT
VT
95% specificity
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VT storm
>3 episodes in 24 hours
Cf. Incessant VT
1 episode of hours duration
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VT storm
Treat cause
More likely due to scar substrate than acute ischaemia if monomorphicDrugsElectrolytesIschaemia
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VT storm
Betablockade
Single most effective treatmentAmiodarone
LignocaineSedation
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Pacing and VT
Appropriate shocks:
Device action can promote cardiac dysfunction– > further arrhythmia
Inappropriate shocks:
Get a magnet [resus trolley]
Cause?• eg. Lead migration/fracture (effusion?)
Reprogramme/control SVT
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78 year old male. History 3 previous MI, NIDDM, BPH. He presents with syncope and subsequent head injury. Normal CT head.
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Would you:AdmitOP follow upDischarge after observation
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Would you:AdmitOP follow upDischarge after observation
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Sinus bradycardia with VEQRS 120, Normal axis1st degree heart block
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ESC guidelines: syncope 2009
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How would you manage him?a) Ignoreb) Bisoprololc) Dual antiplatelet therapyd) Amiodarone
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NSVT
Can be found in structurally normal hearts
Ask yourself what is the cause
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Post MI, Cardiomyopathy groups:
Suppression of ambient arrhythmia is not a therapeutic target
ACC/AHA/ESC 2006 guidelines for management of patients withventricular arrhythmias and the prevention of sudden cardiac death
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VT or not VT?
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Three hundred and forty-eight VTs and 170 SVTs with aberrant conduction were included in the comparison: Brugada criteria.
Alzand B S , and Crijns H J Europace 2011;13:465-472
Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2010. For permissions please email: [email protected].
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How to look with VT
Hx IHD (95% specificity)+ AVR (80% specificity)Capture beats [sinus beat]Fusion beats [hybrid complexes]Discordant P wavesConcordant complexes
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Discordant QRS complexesNegative aVRBut…• Capture beats• Fusion beats
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+ AVRConcordant
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No positive criteria for VT• LBBB• Sharp initial downstroke
SVT + LBBB aberrancy?VT- not ruled out
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Preexcited AF
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Preexcited AF
AF in the context of an accessory pathway
Variable QRS length
High risk to degenerate into VF
AV Nodal agents contraindicated
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Artefact
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Summary
Identify high risk ACSInterpret ischaemic ECGsUnderstand pharmacokinetics on anti-arrhythmicsLook good identifying VT
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Acknowledgement
Patients from UCLH and the Heart Hospital
Lifeinthefastlane.com