5 Cardiology Flashcards
What condition causes ST elevation in ALL leads?
Endocarditis
Characteristic and lead of LBBB and RBBB
LBBB = M shape in V6 RBBB = RSR' in V1
Normal axis of the heart
-30 > +90
Guideline recommendation classes (123)
1 = strong evidence/ agreement, use recommended
2 = conflicting/ mixed evidence
a - evidence in favour, should be considered
b- evidence less in favour, may be considered
3 = evidence against, not recommended
Levels of evidence (ABC)
A = multiple RCT/ meta-analyses B = single RCT/ large NR (non randomised) studies C = small NR/ expert opinions/ retrospective/ registries
Hard vs soft endpoints of a clinical trial
Hard = definitive e.g. death, MI Soft = spectrum e.g. QoL
NYHA heart failure classification (1-4)
1) no symptoms or limitation - ordinary activity
2) mild symptoms and limitation - ordinary activity
3) marked limitation and symptoms - less than ordinary activity, only comfortable at rest
4) Severe limitations - symptoms at rest
Investigations for heart failure:
Initial (5) 2nd line (5)
Initial: >ECG >CXR >Echo >Bloods - FBC (Hb, MCV), chemistry (LFT, U+E, urate, urea, creatinine) >Natriuretic peptides
2nd line: >Ambulatory ECG >Exercise tolerancetest >Coronary angiogram >Genetic test >Myocardial biopsy
Treatments of HF
1) ACE/ARB + BB
2) add MRA (+ ACE/ARB + BB)
3) swap ACE/ARB for sacubatril/valsartan (Neprolysin-inhibtor/ARB)
4) ICD + ivabradine
5) digoxin/ hydralazine-isosorbide dinitrate
6) LVAD/ transplant
Endings of names of: ACEi ARBs B-Blockers Potassium sparing diuretic
ACEi = pril
ARBs = artan
B-Blockers = lol
Potassium sparing diuretic = one
Effects of entresto - sacubatril/valsartan
Valsartan = ARB - blocks angiotensin 2 binding receptor
Sacubitril = Neprilysin inhibitor - prevents breakdown of natriuretic peptides by neprilysin
Devices used in heart failure (2) and when are they used
ICD (implantable cardioverter defibrillator) - shocks heart if arrhythmia starts
CRT (cardiac resynchronisation technique) - electrodes in both sides of heart to resynchronise them
Function in heart failure of:
Ivabradine
Hydralazine-isosorbide dinitrate
Ivabradine: inhibits sinus node, reducing sinus rate
Hydralazine-isosorbide dinitrate: vasodilation
Risks of LVAD
Infection (line)
Clotting - needs blood thinners
CXR signs of heart failure (stage 1-3)
Stage 1 (redistribution):
>cardiomegaly
>dilation upper lobe vessels
Stage 2 (interstitial oedema): >kerley B lines >peribronchial cuffing >hazy vessel contour >sub pleural pulmonary oedema >thickened interlobular fissures
Stage 3 (alveolar oedema): >alveolar oedema (bat wings) >pleural effusion >air bronchogram >consolidation >cotton will appearance
3 non-surgical procedures for valve repair
TAVI (transcatheter aortic valve replacement) - balloon with stent and new valve - aortic stenosis
Mitraclip - clips leaky valves together - mitral regurg
Valvuloplasty - Balloon opening stenosis in thickened mitral valve
Symptoms of mitral stenosis/regurg
Both:
Volume overload > dilated LA > AF > pul hypertension > dilated R heart
> Chest pain
Palpitations
SOB
RH failure symptoms
Stenosis only - haemoptysis
Symptoms of aortic stenosis/regurg
Both:
>SOB
>Decreased exercise tolerance
A Stenosis
>Syncope
>Presyncope
Causes of mitral stenosis/regurg
M Stenosis:
>Rheumatic
>Congenital
M Regurg: >Infective endocarditis >Systemic CTD >Rupture >Damage to papillary muscles/ chord tendinae >Prolapse
Causes of aortic stenosis/regurg
A Stenosis:
>Calcification/ thickening
>Congential
>Rheumatic
A Regurg: >Systemic CTD >Infective endocarditis >Degeneration >Root annulus dilation >Rheumatic >Bicuspid aortic valve
Most common organism causing endocarditis:
NVE
PVE
IVDU
NVE - strep (viridans)
PVE - CoNS (coagulase negative staph)
IVDU - staph (aureus
3 stages of presentations of acute infective endocarditis
1 - early:
>fever and new murmur
>malaise/ fatigue
2 - embolic:
>small - splinters, petichiae, haematuria
>large - stroke/ CVA, renal infarction
>septic emboli to lungs
3 - late:
>immunological - osler’s, clubbing, nephritis, splenomegaly, vasculitic skin and eye lesion
>tissue damage - valve abscess/ destruction
Main points to think of infective endocarditis
Fever + NEW murmur = IE UPO
Any staph aureus bacteremia
IVDU/ prosthetic valve + +ve blood culture
Criteria for diagnosis of infective endocarditis
Duke criteria = 5 min/ 2 maj/ 1maj+2min
Major:
>positive echo or new murmur/regurg
>typical organisms in at least 2/3 culture samples
Min: >positive for other organisms >fever >38 >predisposition )IVDU/heart condition) >vascular/ embolic phenomena >immunological phenomena
Investigations for infective endocarditis
Blood cultures
Echocardiogram
ECG
Antibiotics used in infective endocarditis MSSA (IVDU) MRSA CoNS (PVE) Enterococci Strep viridans (NVE)
MSSA (IVDU) - flucloxicillin MRSA - vancomycin CoNS (PVE) - vancomycin and rifampicin Enterococci - amoxycillin OR vancomycin Strep viridans (NVE) - benzylpenicillin
ALL GENTAMYCIN
Definition of unstable angina
Acute coronary event without rise in troponin (ECG change and clinical presentation like MI)
5 types of MI
Type 1 - 1y Type 2 - 2y Type 3 - sudden cardiac death Type 4 - iatrogenic (stent) Type 5 - iatrogenic (CABG surgery)
Arteries relating to MI: Anterior (V1-4) Posterior (anterior ST depression) Inferior (II, III, aVF) Superior (aVR) High lateral (V5-6, I, aVL)
Anterior (V1-4) - LAD Posterior (anterior ST depression) - circumflex Inferior (II, III, aVF) - RCA Superior (aVR) - LCA High lateral (V5-6, I, aVL) - circumflex
Treatment of STEMI (Pre-PCI)
1) ABCD - defib and call ambulance/ rush to PCI centre
Give aspirin and UFH
2) clopidogrel, antiemetic and analgesic
3) swap clopidogrel for ticagrelor and activate PCI team
Give pre-hospital thrombolysis only if:
>wait over 90mins for PCI
>not in shock
>not contraindicated
Treatment of STEMI (and NSTEMI) Post-PCI
Monitor in CCU for complications
Drugs:
>ACEi, BB, statin
>eplerenone - diabetic, LVSD, HF
Cardiac rehab
Echo
Consider ICD - LVSD >9 months
What differentiates pericarditis from STEMI on ECG?
Concave ST elevation instead of convex
ST elevation doesn’t follow a pattern
No reciprocal ST depression
(PR depression)
What do hyper acute T waves suggest?
Early sign of STEMI
Symptoms and examination of ASD (secundum)
Symptoms:
>Palpitations
>Oedema
>SOB
Exam: >Atrial arrythmia (dilation) --> Stroke >Tricuspid regurgitation --> Pulmonary flow murmur >Fixed, split, second heart sound >Pulmonary hypertension >RV failure >Eisenmenger syndrome
General symptoms of coarctation of aorta (if after ductal position/ juxta-ductal)
And treatment/ repair (2)
> Upper body hypertension - nosebleeds, berry aneurysms, headaches
Lower body hypotension - abdo angina, claudication, cyanosis, renal insufficiency
Radiofemoral delay
Continuous murmur - due to turbulent blood flow
Repair:
1) trans catheter balloon stent
2) surgical resection end-end anastomosis
Treatment options and risks for repair of great artery transposition (2)
1) atrial switch - RV can’t cope with pressure long term - RV dilation/ failure, tricuspid regurg
2) arterial switch - coronary artery problems
Characteristics of Tetralogy of Fallot
and imaging/ECG appearances (2)
1) overriding aorta
2) obstruction of pulmonary outflow
3) VSD
4) RV hypertrophy
CXR - boot shape
ECG - R hypertrophy and RBBB
Treatments of of Tetralogy of Fallot (2)
Repair VSD and pulmonary flow with patches
Cut away excess muscle
Causes of pressure change in Fontan circulation
PE - inc pul
Bleeding - dec systemic
Arrhythmia - dec systemic
Dehydration - dec systemic
Investigations done in AF (4)
ECG
Echo
TFTs
LFTs
Scoring system to identify annual stroke risk in AF patients
CHA2DS2-VASc score
Anti-arrhythmic drugs used in AF
Class 1 = Na channel blockers
> flecainide
>propafenone
Class 2 = K channel blockers
>sotalol
>amiodarone
Multichannel blockers = dronedarone
Hypertension grade classifications
1 = > 140/ 90 2 = > 160/ 100 3= > 180/110
Causes of 2y hypertension (5)
1) Drugs - coke, NSAIDs, steroids, herbals, OCP, cyclosporin, liquorice
2) Endocrine - hyperaldosterone, Cushings, thyroid, phaechromocytoma
3) Renal - stenosis, disease
4) Vascular - coarctation of aorta
5) Other - COPD
ASA (american society anaesthetics) surgical risk score
1 = healthy 2 = mild systemic disease 3 = severe systemic disease 4 = severe systemic disease, constant threat to life 5 = moribund, not likely to survive 6= brain dead organ donor E/P = emergency / pregnant
MET (metabolic equivalent of task) scoring and surgical risk
1 = basal 3 = walking 100m 4 = walking up stairs/ gardening 7 = jog 10 = intense exercise
Lee’s revised cardiac risk index for elective surgery (6)
% chance of a CV incident
1) high risk surgery
2) IHD
3) previous HF
4) cerebrovascular disease
5) insulin therapy
6) creatinine >177