ecg webinar series · 2020. 5. 19. · •o/e: cta, hs-i-ii-0, bilateral pitting oedema to mid calf...
TRANSCRIPT
![Page 1: ECG Webinar Series · 2020. 5. 19. · •O/E: CTA, HS-I-II-0, bilateral pitting oedema to mid calf •RR 20, SpO 2 95%, HR 122 (irreg irreg), BP 168/102 | 01895 730020 | webinars@stctrainingsolutions.co.uk](https://reader036.vdocuments.us/reader036/viewer/2022071217/604d98be2799b5632848a4bd/html5/thumbnails/1.jpg)
ECG Webinar SeriesEpisode 2: Lead II Rhythms
18th May 2020 at 19:00
Presented by:
Mr Innes Eaton
Paramedic Practitioner
STC Training SolutionsAsk us about our BLS and ILS refresher training for
healthcare professionals!
01895 730020 | [email protected]
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Ways to Interact
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ECG Webinar Series | Episode 2 | Lead II Rhythms
1. Grab your smart phone
2. Go to: www.menti.com
3. Enter the code
4. Answer the question
07535 382223
Tweet us:
@STCTrainingLtd
Email us:
In the Zoom chat:
STC Admin
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Session Plan
• Refresher of the individual waves
• Normal sinus rhythm
• Basic arrhythmias
• Atrial flutter & atrial fibrillation
• AV blocks
• Cardiac arrest rhythms
• Q&A Session
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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ECG Waves Refresher
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ECG Webinar Series | Episode 2 | Lead II Rhythms
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The 6 Rules of NSR
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ECG Webinar Series | Episode 2 | Lead II Rhythms
1. Is it regular?
2. Is the rate 60-100bpm?
3. P:QRS = 1:1
4. PR interval 120-200ms & constant5. QRS duration ≤120ms
6. QTc duration ≤450ms (approx.)
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Diagnosing Arrhythmias
• General• Fast or slow?
• Regular, regularly irregular or irregularly irregular?
• P-waves• Are they there?
• Are they monomorphic?
• Is the P:QRS ratio 1:1?
• Is the PR interval constant at 120-200ms?
• QRS complexes• Is there P-QRS association?
• Is the duration <120ms?
• Are they grouped together?
• Are there any dropped beats?
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Fast or Slow?
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ECG Webinar Series | Episode 2 | Lead II Rhythms
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Case Study 1
• 25 y/o Caucasian male, NF&W
• No PMH/PSH/DHx/Cardiac FHx
• Non-smoker, social drinker, no recreational drugs
• Sx suggestive of LRTI
• RR 16, SpO2 98%, HR 70 (reg irreg), T37.5, BP 116/78
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Interactive Quiz
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ECG Webinar Series | Episode 2 | Lead II Rhythms
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Sinus Arrhythmia
Differential Diagnoses (DDx)
• In younger, healthy patients• Respiratory sinus arrythmia (RSA)
• Inspiration: Reduced intrathoracic pressure reduces vagal tone and thus increases heart rate
• The opposite occurs during expiration
• This is a ‘normal’ finding and may actually improve V/Q matching in the alveoli
• In older, co-morbid patients• Non-respiratory sinus arrythmia (Alternans)
• Age related baroreceptor changes
• Heart disease
• Cardiac glycosides (Digoxin) and vagal agents (Morphine)
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Regularly Irregular
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ECG Webinar Series | Episode 2 | Lead II Rhythms
Respiratory Sinus
Arrhythmia
Second Degree Heart Block – Type 1
(Mobitz I – Wenckebach)
Ventricular
Bigeminy
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Irregularly Irregular
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ECG Webinar Series | Episode 2 | Lead II Rhythms
Atrial Fibrillation
Wandering Atrial
Pacemaker
Multifocal Atrial
Tachycardia
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Atrial Fibrillation (AF) vs Atrial Flutter (AFT)
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ECG Webinar Series | Episode 2 | Lead II Rhythms
Co-ordinated atrial activity? Irregular or regular QRS complexes?
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Case Study 2
• 82 y/o Caucasian female, doesn’t come in very often
• PMH: Essential HTN, DHx: Amlodipine 10mg Od
• 3/12 progressive exertional dyspnoea, ankle swelling and ‘flutters’ in her chest (especially at night)
• No sx of infection
• O/E: CTA, HS-I-II-0, bilateral pitting oedema to mid calf
• RR 20, SpO2 95%, HR 122 (irreg irreg), BP 168/102
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Interactive Quiz
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Case Study 2
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ECG Webinar Series | Episode 2 | Lead II Rhythms
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Atrial Fibrillation
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ECG Webinar Series | Episode 2 | Lead II Rhythms
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Interactive Quiz
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Management of Atrial Fibrillation• CHA2DS2-VASc score to assess stroke risk
• 0 = Low Risk | 1 = Mid Risk | 2+ = High Risk
• HAS-BLED score to assess bleeding risk• Warfarin in preferred over NOACs in high falls risk• Apixaban is favoured with symptomatic heart failure• Rivaroxaban is favoured if there has already been a stroke/TIA
• Consider TTE/TOE in patients indicated for rhythm control
• Rate control• β blocker (Bisoprolol) or rate-limiting CCB (Verapamil/Diltiazem)• +/- Digoxin
• Rhythm Control• Cardioversion• Pharmacological• Ablation
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
Refer to
NICE CG180
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Atrial Flutter
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• Typically 2:1 or 3:1
• 1:1 is unsustainable
• ≥5:1 is known as high AV block
• Variable conduction is common
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Refractory Periods
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ECG Webinar Series | Episode 2 | Lead II Rhythms
ARP vs RRP
• Voltage gated Na+ channels are
not ‘primed’ for use until passing
through -50mV during phase 3
• Before the end of this ‘Absolute
Refractory Period’ (ARP), no
further depolarisation can occur
• During the ‘Relative Refractory
Period’ (RRP), depolarisation can
occur if the stimulus is big enough
• The highest co-ordinated HR is
therefore around 240bpm
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AV Blocks
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• In health, the AV node delays the signal
travelling between the internodal pathways and
the Bundle of His by 120-200ms
• This forms the PR interval and is important to
allow ventricular pre-filling before contraction
• The AV node should conduct every impulse
that it receives
• A conduction delay of more than 200ms, or
the failure to conduct any of the impulses, is
known as an AV block
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1st Degree AV Block
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• The AV node delays the electrical impulse by
more than 200ms
• This presents as a prolonged PR interval
• If the PR interval is more than 300ms, it is
often called ‘Marked’ 1st Degree AV Block
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3rd Degree AV Block
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• Also called Complete Heart Block (CHB)
• The AV node does not conduct any electrical
impulses to the Bundle of His
• This presents as a disassociation between
P:QRS and a slow, wide QRS complex
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2nd Degree AV Block – Type 1
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• Also called Mobitz I or Wenckebach Phenomenon
• The AV conduction delay gradually increases to the point
of ‘dropping a beat’ (the impulse in not transmitted)
• This presents as a regularly irregular rhythm with a
gradually increasing PR interval
P’s on the run?
It’s Mobitz type 1!
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2nd Degree AV Block – Type 2
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• Also called Mobitz II or Hay Block
• AV conduction appears to be normal in most beats
(constant PR), but randomly fails to conduct an impulse
• This presents as a predominantly ‘normal’ ECG with
random ‘missing’ QRS complexes
P’s marching through?
It’s Mobitz type 2!
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2nd Degree AV Block – 2:1 Conduction
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• The AV node only conducts every other impulse
• It is not possible to definitively say whether the block is of
Mobitz I or Mobitz II pathology
• As Mobitz II usually occurs in the context of pre-existing
bundle blocks, it will usually produce a wider QRS complex
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High Grade AV Block
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ECG Webinar Series | Episode 2 | Lead II Rhythms
• Generally considered to be a type of 2nd Degree AV Block
• This is where the AV node conducts fewer than 1 in 4
electrical impulses – a conduction of 4:1 or worse
• It is generally treated as 3rd Degree AV Block – urgent
cardiology input +/- pacemaker
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Case Study 3
• 70 y/o Indian male comes in feeling faint
• He passes out in the waiting room
• You answer the crash call and go to assist
• O/E: Pain response, RR 20, HR 35 (reg), absent radial
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Interactive Quiz
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Interactive Quiz
www.stctrainingsolutions.co.uk | 01895 730020 | [email protected]
ECG Webinar Series | Episode 2 | Lead II Rhythms
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Cardiac Arrest Rhythms
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ECG Webinar Series | Episode 2 | Lead II Rhythms
Asystole
PEA
VF
pVTNon-Shockable (Aystole/PEA)
• Adrenaline 1mg 3-5 mins
Shockable (VF/pVT)
• Shock every 2 mins
• Adrenaline 1mg 3-5 mins
• Amiodarone 300mg 3rd Shock
• Amiodarone 150mg 5th Shock
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Thank You!
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ECG Webinar Series | Episode 2 | Lead II Rhythms