Cardio Flashcards
What is an accelerated idioventricular rhythm? Management?
Benign ectopic rhythm of ventricular origin
Occurs following reperfusion of ischaemic tissue, electrolyte abnormalities or drug toxins –> increased rate of ventricular depolarisation
Management: Self limiting
What are the acceptable rise in eGFR/creatinine when starting ACEi?
Creatinine - up to 30%
eGFR - up to 25%
K - up to 5.5
What is achondroplasia?
Autosomal dominant
Short stature
Large heart with frontal bossing
Trident hands
Lumbar lordosis
Management of STEMI?
Aim saturations >94%
GTN, IV morphine, metoclopramide
Aspirin 300mg
+Clopidogrel/Ticagrelor/Prasurgel
NOTE: Ticagrelor is now preferred over clopidogrel if medically managed. Aspirin and Prasugrel if PCI
PCI within 120 minutes
If not, fibrinolysis. If failure of resolution at 90 minutes on ECG, then transfer for PCI
Management of acute pericarditis? Most specific ECG finding? What should all patients have?
NSAID + Colchicine
ECG: PR depression most specific. Widespread saddle shaped ST elevation
All should have TTE
Causes of pericarditis? (8)
viral infections (Coxsackie) tuberculosis uraemia (causes 'fibrinous' pericarditis) trauma post-myocardial infarction, Dressler's syndrome connective tissue disease hypothyroidism malignancy
What potentiate the effects of adenosine?
Dipyridamole
What reduces the effects of adenosine?
Theophyllines
What condition is a contraindication for adenosine?
Asthma
Can enhance conduction down accessory pathways i.e. WPW
Examples of ADP (adenosine diphosphate) receptor inhibitors?
Clopidogrel
Prasugrel
Ticagrelo
Ticlopidine
New recommendations for dual antiplatelet treatment for 12 months as secondary prevention?
Aspirin (75mg OD)
Ticagrelor (90mg BD)
What is the interaction between clopidogrel and PPIs?
Reduced antiplatelet effects
What are the four Hs and four Ts in ALS?
Hypoxoia
Hypovolaemia
Hyperkalaemia/Hypokalaemia/Hypoglycaemia/Hypocalcaemia
Hypothermia
Thrombosis
Tension Pneumothorax
Tamponade
Toxins
When is adrenaline given in VT/VF arrest?
After the third shock. The every 3-5 minutes (alternate cycles)
When is adrenaline given in asystole/PEA?
Immediately
What would amyloidosis look like on an ECG?
What might you see on echo?
Low voltage complexes
Poor R wave progression
Global speckled pattern on echo
What is drug management of angina?
- Beta-blocker or Calcium Channel blocker (verapamil or diltiazem if monotherapy. Nifedipine, amlodipine, felodipine if dual)
- Poor response - titrate up
- 1: Add second agent
- 2: If no response and second agent not tolerated, add long acting nitrate, ivabradine, nicorandil, ranolazine
- Assess for PCI or CABG
All patients:
Aspirin
Statin
GTN
What should you do i nitrate tolerance develops in angina?
Second dose after 8 hours (for IR only)
Antiplatelet management (first and second line):
Medically treated ACS
Aspirin (life)
Ticagrelor (12 mo)
OR Clopidogrel (life)
Antiplatelet management (first and second line):
PCI
Aspirin (life)
Ticagrelor/Prasurgrel (12 mo)
OR Clopidogrel (life)
Antiplatelet management (first and second line):
TIA
Clopidogrel (life)
OR Aspirin (lifelong) & dipyridamole (lifelong)
Antiplatelet management (first and second line):
Ischaemic Stroke
Clopidogrel (life)
OR Aspirin (lifelong) & dipyridamole (lifelong)
Antiplatelet management (first and second line):
Peripheral Arterial Disease
Clopidogrel (life)
OR
Aspirin (life)
Signs of aortic regurgitation?
Early diastolic murmur Collapsing Pulse Wide pulse pressure Quinke's sign De Musset's sign Mid-diastolic Austin Flint murmur if severe
Aortic dissection management.
Type A vs Type B
Type A:
Surgical
BP aim 100-120
Type B:
Conservative
IV Labetalol
Features of aortic stenosis?
Chest pain
SOB
Syncope
Ejection systolic murmur Narrow pulse pressure Slow rising pulse Delayed ESM Soft/absent S2 S4 Thrill LVH
Management of aortic stenosis?
What other investigation should be done whilst investigating and why?
Symptomatic - replace
Asmyptomatic with gradient >40mmHg - consider surgery
Often do angiogram at same time - so can have CABG if needed
What is arrhythmogenic right venticular cardiomyopathy?
Typical ECG findings?
Management?
Autosomal dominant
Fatty and fibrofatty tissue replaced
Palpitations
Syncope
Sudden cardiac death
V1-3 T Wave Inversion Epsilon Wave (terminal notch in QRS)
Management:
Sotalol
ICD
Catheter Ablation
How to rate control AF?
Beta-blocker
OR
Rate-limiting calcium channel blocker (Diltiazem)
If this fails, can combine with any 2 of the following:
Beta-blocker
Diltiazem
Digoxin
Who can be electively cardioverted in AF?
What extra precaution of high risk of failure?
Only if new onset for 48 hours –> heparinise
Onset >48hrs
Anticoagulated for 3 weeks and then continue for 4 weeks after (or can exclude with TOE and then heparinise and cardiovert immediately)
If high risk of failure (previous failure, AF recurrence) - at least 4 weeks amiodarone or sotalol prior
What is CHA2DS2VASc score?
CCF (1) HTN (1) Age 75 (2) Age 64-75 (1) Diabetes (1) Stroke/TIA (2) Vascular Disease (1) Sex - Female (1)
If 0 - no treatment
If 1 - male consider, female no treatment
If 2 - offer anticoagulation
Where should atrial flutter be ablated?
Radiofrequency ablation of the tricuspid valve isthmus
What is an atrial myxoma?
Features?
Primary cardiac tumour
75% in left atrium
SOB Fatigue Pyrexia Clubbing Emboli AF Mid diastolic murmur Tumour plop
Features of ASD?
ESM
Fixed split S2
What are the features of the two common ASDs?
Ostium Secundum
70%
Higher in location
ECG: RBBB with RAD
Ostium Primum
Abnormal AV valve
Lower in location
ECG: RBBB with LAD, prolonged PR
What is Mobitz 1?
Progressive prolongation of PR interval until dropped beat
What is Mobitz 2?
PR interval constant
P wave often not followed by a QRS complex
What drug must beta blockers never be used with? Why?
Verapamil
Can cause severe bradycardia
What is Brugada syndrome? How is it managed?
Autosomal dominant
Mutation in SCN5A gene –> sodium ion channel (20-40%)
Can cause sudden death
Management:
ICD
What are characteristic ECG findings of Brugada?
Convex ST elevation >2mm in V1-3 followed by negative T wave
Partial RBBB
May be more apparent with flecainide or ajmaline
Which returns lower oxygenation levels. The IVC or SVC?
SVC returns lower oxygenation levels due to the higher consumption of the brain
What non-invasive imaging modalities can you use for investigating the heart (i.e. following NSTEMI)
Nucelar Imaging
- assess myocardial perfusion and myocardial viability
Cardiac CT
- calcium score
- contrast CT - visualise coronary artery lumen
Cardiac MRI
- gold standard for structural abnormalities
- perfusion
Beck’s triad in cardiac tamponade?
Hypotension
Raised JVP
Muffled Heart sounds
Also: SOB Tachycardia Absent Y descent Pulsus paradoxus Kussmauls Electrical alternans
JVP in cardiac tamponade vs constrictive pericarditis?
Cardiac Tamponade
- Absent Y descent
Constrictive pericarditis
X + Y present
Common echo findings suggestive of HOCM?
MR
Systolic anterior motion of anterior mitral valve
Asymmetric septal hypertrophy
Causes of dilated cardiomyopathy?
Alcohol
Coxsackie B
Wet Beri Beri
Doxorubicin
Causes of restrictive cardiomyopathy?
Amyloidosis
Post-radiotherapy
Loeffler’s edocarditis
What are the three features of typical angina?
- Constricting discomfort in front of chest, neck, shoulders, jaw or arms
- Precipitated by physical exertion
- Relieved by rest or GTN in 5 minutes
Investigation of stable angina?
How is this order changed according to likely hood of coronary artery disease? >90% 61-90% 30-60% 10-29%
- CT coronary angiography
- Non-invasive functional imaging (ie. MPS with SPECT, Stress Echo, MRI)
- Invasive Coronary Angiography
> 90% - no tests
61-90% - Invasive coronary angiography
30-60% - functional imaging
10-29% - CT calcium scoring
Features of cholesterol embolisation?
Eosinophilia
Purpura
Renal Failure
Livedo reticularis
Features of complete heart block?
Syncope Heart Failure Regular bradycardia Wide pulse pressure JVP - cannon waves Variable intensity of S1
Features of constrictive pericarditis?
SOB Right heart failure (elevated JVP< ascites, oedema, hepatomegaly) Prominant X and Y descent Pericardial knock Kussmaul's sign Pericardial calcification on CXR
How does dabigatran work?
What is it used for?
Direct thrombin inhibitor
Used for prevention of stroke in patients with non-valvular AF
Management of HTN in diabetes:
What is the target BP?
Target BP with end organ damage?
What should first agent be?
Aim <140/80
Aim <130/80 if end organ damage
Begin with ACEi regardless of age or race.
If African, begin with ACEi + Thiazide/CCB
What are common cardiac defects found in patients with Down’s syndrome?
Endocardial cushion defect (40%)) VSD (30%) 2. ASD (10%) ToF (5%) PDA (5)
DVLA Rules for:
Elective Angioplasty CABG ACS +/- PCI Angina PPM ICD (for arrhythmia, for prophylaxis) AAA >6.5cm Catheter ablation for arrhythmia
Elective Angioplasty
- 1 week
CABG
- 4 weeks
ACS +/- PCI
- 4 weeks
- 1 week if PCI
Angina
- stop if sx at rest
PPM
- 1 week
ICD
- 6 months (arrhythmia)
- 1 month (prophylaxis)
AAA >6.5cm
- Banned
Catheter ablation for arrhythmia
- 2 days
ECG Criteria for electrical hypertrophy?
> 40mm the sum of V1 S and V5 or V6 R
Bifid P wave?
Left atrial enlargement
ECG Bifasicular block?
RBBB + left anterior or posterior hemiblock
i.e. RBBB with LAD
ECG Trifasicular block?
RBBB + left anterior or posterior hemiblock
+
1st degree block
ECG Territories and Coronary Arteries
Anterior Septal
Inferior
Anterolateral
Lateral
Posterior
Anterior Septal
- V1-V4
- LAD
Inferior
- II, III, aVF
- Right Coronary
Anterolateral
- V4-6, I, aVL
- LAD or Left circumflex
Lateral
- I, aVL +/- V5-6
- Left circumflex
Posterior
- Tall R wave V1-2
- eft circumflex, also right
ECG Digoxin signs (4)
Downward sloping ST depression
Flattened/Inverted T wave
Short QT
Arrhythmia
ECG Hypokalaemia
U waves Small or absent T waves Prolong PR ST depression Long QT
ECG Hypothermia
Bradycardia J wave (small hump at end of QRS) 1st degree block Long QT Atrial and ventricular arrhythmia
ECG P Pulmonale?
Cor Pulmonale
What is the significance of prolonged PR infective endocarditis?
Abscess secondary to endocarditis –> refer to cardiac surgeons
What is Eisenmenger’s Syndrome?
Reversal of a left to right shunt in a congenital heart defect due to pulmonary hypertension
ASD
VSD
PDA
How should acute heart failure patients be classified?
Four groups
With or without hypoperfusion
With or without fluid congestion
Management of heart failure? What cardiac drug class is contraindicated?
ACEi
B-Blocker (bisoprolol, carvedilol, nebivolol)
Spironolactone/Hydralazine with nitrates/ARB
Consider CRT (If NHYA Class III, Wide QRS)/Digoxin (digoxin indicated if co-existant AF)
Consider Ivabradine if HR >75, EF <35% and on maximal medical
Annual influenza Vaccine
One off pneumococcal vaccine
Contraindicated: Rate-limiting CCB
What is S3 heart sound?
Rapid diastolic filling of ventricle
Heard in LVH, constrictive pericarditis, mitral regurgitation
What is S4 heart sound?
Atrial contraction against a stiff ventricle
Heard in aortic stenosis, HOCM, HTN
Cause of widely split S2?
RBBB
Deep inspiration
Pulmonary stenosis
Severe MR
Cause of loud S2?
HTN
Cause of reversed split S2?
LBBB Severe aortic stenosis WPW Type B PDA RV pacing
Cause of fixed split S2?
ASD
Features of HELLP?
N&V
RUQ pain
Lethargy
Haemolysis
Elevated Liver Enzymes
Low Platelet
Management:
Deliver baby
What is homocystinuria?
Autosomal recessive
Defieicny in cystathionine beta synthase
Severe elevations in plasma and urine homocysteine
Fine fine hair Marfan's like Learning difficulty Dislocation of lens Malar flush
Positive cyanide-nitroprusside test
Positive cystinuria
Treat: Vitamin B6 (pyridoxine)
ECG changes from hypercalcaemia?
Short QT interval
Diagnosis of HTN?
Clinic Reading >140/90
Offer ABPM
<135/85 - Nil
>135/85 - Stage 1 HTN
>150/95 - Stage 2 HTN
Treatment of Stage 1 HTN
Only if < 80 years and any of the following:
- Target organ damage
- CVS disease
- Renal disease
- Diabetes
- 10 yr score >10%
When should immediate HTN be arranged in clinic?
If BP > 180/110
Signs of papilloedema or retinal haemorrhages
Management of HTN?
Lifestyle (low salt <6g, low caffeine, stop smoking, less alcohol, Mediterranean diet, exercise, lose weight)
< 55 or T2DM
1) ACEi
2) ACEi + CCB or Thiazide-like
> 55 or Afro-caribbean
1) ACEi
2) ACEi + CCB
Common Pathy
3) ACEi + CCB + Thiazide-like
4) If K <4.5 - Spiro. If K >4.5 alpha or beta blocker
What is resistant HTN?
HTN requiring step four of treatment algorithm.
You should seek specialist advice if this fails
BP Target (in clinic and home)
< 80 years
> 80 years
<80
140/90
135/85
> 80
150/90
145/85
Causes of secondary HTN?
Renal:
- Glomerulonephritis
- Pyelonephritis
- APKD
- Renal Artery Stenosis
Endo:
- Conn’s
- Phaeo
- Cushing
- Liddle’s
- CAH
- Acromegaly
Drug:
- Steroids
- MAOi
- COC
- NSAIDs
- Leflunomide
Other
- Pregnancy
- Coarctation of aorta
Management of Hypertrophic obstructive cardiomyopathy?
(ABCDE) Amiodarone Beta-blocker/verapamil Cardioverter Defibrillator Dual Chamber PPM Endocarditis Prophylaxis
AVOID:
Nitrates
ACEi
Inotropes
Infective endocarditis:
Most common organism in Developing world
Streptococcus Viridans
Infective endocarditis:
Most common organism in Developed world
Staphylococcus Aureus