Cardiology Flashcards
hypertension is a risk factor for
Stroke - ischaemic and haemorrhagic MI HF CKD Cognitive decline Premature death Peripheral vascular disease
What are optimal, normal and high blood pressures
Optimal < 120 / 80
Normal 120 - 139 / 80-89
high >140/90
How often should healthy patients have BP checked routinely
At least every 5 years until age 80
Define postural hypotension
A fall in SBP >20mmHg
1st step in investigation once BP >140/90
Ambulatory BP monitoring / at home BP monitoring
Assess CV risk and target organ damage
Define stage 1, 2 and 3 hypertension
Stage 1 - 140-159 /90-99
Stage 2 - 160-179 /100-109
Stage 3 - >179
Features suggesting phaeochromocytoma
Labile / postural hypertension Headache Palpitations Pallor Diaphoresis (excessive sweating)
1st line anti-hypertensives in over 55s
Calcium channel blocker
2nd line anti-hypertensives in over 55s
Calcium channel blocker
AND
Ace inhibitor / angiotensin receptor blocker
2nd line anti-hypertensives in under 55s
Ace inhibitor / angiotensin receptor blocker
AND
calcium channel blocker
3rd line anti-hypertensives
Ace inhibitor / angiotensin receptor blocker AND Calcium channel blocker AND Diuretic (thiazide-like)
CV risk factors
> 75 yo Male CV disease Hypertension Hypercholesterolaemia DM Smoking Obesity Sedentary lifestyle Familial hypercholesterolaemia Peripheral vascular disease Polycythaemia rubra Vera LV hypertrophy
Lifestyle interventions In Hypertension
Diet Exercise Relaxation Decrease alcohol Decrease caffeine Decrease salt Smoking cessation
Examples of ACE inhibitors
Ramipril Captopril Enalapril Lisinopril Perindopril
SE of ace inhibitors
Dry cough (^bradykinin)
Rare - angioedema, proteinuria, neutropenia
Can –> CRF in bilateral RAS
Examples of angiotensin II receptor blocker
Losartan
Valsartan
Candesartan
Examples of calcium channel blockers
Amlodipine
Nifedipine
Nimodipine
Felodipine
SE of calcium channel blockers
Dizziness, hypotension, flushing, ankle oedema
Examples of thiazide-like diuretics
Chlorothiazide
Chlortalidone
Indapamide
Examples of thiazide diuretics
Bendroflumethiazide
Hydrochlorothiazide
When may beta-blockers be considered
- intolerance of ACEi and ARB
- F of childbearing age
- pt with increased sympathetic drive
most common cause of hypertension
essential hypertension
80-90%
Factors contributing to essential hypertension
genetic fetal - low birth weight environmental - obestity - alcohol intake - sodium intake - stress insulin resistance
causes of secondary hypertension
renal disease endocrine disorders congenital coarctation of the aorta drugs pregnancy
renal causes of secondary hypertension
Diabetic nephropathy Chronic glomerulonephritis Adult polycystic kidney disease Chronic tubulointerstitial disease renovascular disease
endocrine causes of secondary hypertension
Conn's Syndrome Adrenal hyperplasia Phaeochromocytoma Cushing's syndrome Acromegally
Define malignant hypertension
Rapid increase in BP to severe levels >180/120
Associated with end organ failure.
E.g. Renal failure, encephalopathy.
Effects of malignant hypertension
Fibrinogen necrosis of vessel wall
Progressive renal failure, proteinuria and haematuria
Retinal haemorrhages, cotton wool spots, hard exudates and papilloedema
Untreated - 80% die within 1 year
What commonly causes a slow rising pulse
Aortic stenosis
What commonly causes a collapsing pulse
Aortic regurgitation
Causes of a bounding pulse
CO2 retention
hepatic failure
sepsis
Cause of radiofemoral delay
Coarctation of the aorta
Causes of pulsus paroxidus
cardiac tamponade pericarditis chronic sleep apnea croup asthma COPD
Caused of raised, fixed JVP
Superior vena cava obstruction
JVP raising on inspiration
Cardiac tamponade
Constrictive pericarditis
Cause of cannon ‘a’ waves in JVP
Complete heart block
Atrioventricular (AV) dissociation
Ventricular arrhythmias
Signs of Mitral stenosis
Tapping apex beat
Loud first heart sound
Rumbling mid-diastolic murmur at apex (louder in left lateral position on expiration)
Signs of Aortic regurgitation
Wide pulse pressure
Displaced, volume-overloaded apex beat
Early diastolic murmur at lower sternal edge (best heard in expiration leaning forward)
Signs of Mitral regurgitation
Displaced, volume overloaded apex beat
Soft first heart sound
Pansystolic murmur at apex radiating to axilla (louder in expiration)
Signs of Aortic stenosis
Narrow pulse pressure
Heaving undisplaced apex beat
Soft second heart sound
Ejection systolic murmur heard in aortic area radiating to carotids and apex
Signs of a Ventricular septal defect
Harsh pansystolic murmur lower left sternal edge
Left parasternal heave
What is the difference between Osler’s nodes and Janeway’s lesions.
In what condition do they occur?
Osler’s nodes = painful hard swellings on fingers/toes
Janeway’s lesions = painless erythematous blanching macules seen on palmar surface
In Infective Endocarditis
Most common complications of acute MI
Sudden death Arrhythmia Cardiogenic shock HF Cardiac rupture Pericarditis Depression / anxiety
Inferior ECG leads
II, III, aVF
Anterior ECG leads
V2-V4
Possible symptoms of acute AF
Asymptomatic Palpitations HF angina SOB Embolic episodes
ECG features of AF
No clear p waves
Baseline fibrillation
Rapid and irregularly irregular QRSs
Management of AF
Treat precipitating cause e.g. Hyperthyroidism
Acute = Rate control or Cardioversion
Long term = warfarin + rate /Rhythm control
Major and moderate risk factors in AF which indicate anticoagulation (not chads vasc)
Major = prosthetic valve / rheumatic mitral valve disease / past stroke or TIA Moderate = >75 / hypertension / HF / DM
What is CHADS VaSc
Congestive HF = 1 Hypertension = 1 Age >75 = 2 65-74 = 1 DM = 1 Stroke = 2 Vascular dis. = 1 Sex - F = 1
What is the most common cause of secondary hypertension?
Renal disease
E.g. Renal artery stenosis, glomerulonephritis
Management of AF lasting > 48 hours
Anticoagulate the patient With warfarin for one month.
Then attempt cardioversion.
Then continue warfarin for 1 more month.
Rate control with beta-blocker or calcium channel blocker.
Management of severely compromised acute persistent AF
Immediate DC shock
Heparin
What drug would aid the diagnosis of an unidentifiable regular narrow complex tachycardia?
Adenosine
Causes AV block -Short half life
(Can cause chest pain)
What is torsade de pointes?
Ventricular tachycardia with varying QRS axis and a prolonged QT interval
What may Torsade de pointes degenerate into?
Ventricular fibrillation
Leading to cardiac arrest
Causes of torsade de pointes?
Drugs,
electrolyte disturbance,
congenital long QT syndrome.
Treatment of torsade de pointes?
IV magnesium sulphate.
Ventricular pacing.
Correct hypokalaemia.
Management of malignant hypertension?
Gradual uncontrolled production of BP
Labetalol.
What causes a slow rising pulse?
Aortic stenosis
Collapsing pulse
Aortic regurgitation
Bounding pulse
Acute CO2 retention
Hepatic failure
Sepsis
Radio femoral delay
Coarctation of aorta
What causes Pulsus bisferiens
Mixed aortic valve disease
HOCM
What causes Pulsus paradoxus
Constrictive pericarditis
Cardiac tamponade
What is pulsus bisferriens
Double pulse
What is Pulsus paradoxus
Abnormally large decrease in SBP and pulse during inspiration.
What is pulsus alternans
Alternating strong and weak beats
What causes pulsus alternans
Left ventricular systolic impairment (Heart failure)
Poor prognosis.
Cause of a raised fixed JVP
SVC obstruction
JVP rising on inspiration
Cardiac tamponade
Constructive pericarditis
Large v waves on JVP
Tricuspid regurgitation
Absent a waves on JVP
AF
Canon a waves on JVP
AV Dissociation
Ventricular Arrhythmia
Cardiac condition associated with malar flush
Mitral stenosis
Cardiac condition associated with pulsatile hepatomegally
Tricuspid regurgitation
Cardiac condition associated with carotid pulsation (corrigan’s sign)
Aortic regurgitation
Cardiac condition associated with head nodding (De Musset’s sign)
Aortic regurgitation
Cardiac condition associated with Capillary pulsations in nailbed (quincke’s sign)
Aortic regurgitation
Cardiac condition associated with Pistol shot heard over femorals (Traube’s sign)
Aortic regurgitation
Cardiac condition associated with Roth spots (Boat shaped retinal haemorrhage)
Infective endocarditis
What are Oslers nodes
Painful hard swellings on fingers or toes
What are janeway lesions
Painless erythematous blanching macula on palmar surface of hand
Features of ASD
Wide, fixed, split 2nd heart sound
Ejection systolic murmur in 3rd ICS
Patent ductus arteriosus
Continuous machinery murmur below L clavicle
Features of transposition of the great vessels
Cyanosis on 1st day of life
X-ray = egg shaped ventricles
Features of tetralogy of fallot
Cyanosis in 1st month of life
X-ray= boot shaped heart
Saw tooth ECG occurs in:
Atrial flutter
Absent p waves on ECG occurs in:
Atrial fibrillation
Sinoatrial block
Bifid P-wave on ECG occurs in:
Left atrial hypertrophy (mitral stenosis)
Peaked p wave on ECG occurs in:
R atrial hypertrophy (Pulmonary hypertension, tricuspid stenosis)
ST depression on ECG occurs in:
MI
ST elevation on ECG occurs in:
MI
LV aneurysm
Saddle shaped ST elevation on ECG occurs in:
Constrictive pericarditis
sI, qIII, tIII on ECG occurs in:
PE
Tented T-waves on ECG occurs in:
Hyperkalaemia
Flattened t waves + prominent u waves on ECG occurs in:
Hypokalaemia
Long Q-T interval on ECG occurs in:
Hypocalcaemia
Inherited (Romano-ward and Jervell Lange-Nielsen)
Drugs (antihistamines, diuretics, antibiotics, anti-depressants, anti-psychotics)
Hyponatraemia
What is wergener’s granulomatosis
Small artery vasculitis
Features of wergener’s granulomatosis
Vasculitis
Granuloma deposition
Involves URT, lungs and kidneys.
Eye signs in 50%
What is the Ziehl-neelsen stain positive for
TB
What is carotid sinus syncope?
Increased sensitivity to external pressure
Leads to syncope on head turning.
What 2 cardiac conditions cause syncope on exertion?
Aortic stenosis
HOCM
What is pre-syncope + it’s symptoms
Presyncope is a state consisting of lightheadedness, muscular weakness, and feeling faint.
Nausea, sweating, ringing in ears.
What are triggers for vaso-vagal syncope
Heat
Fear
Stress
(Excessive activation of parasympathetic NS)
What happens after a vaso-vagal syncope?
Rapid recovery
What is situational syncope
Vasovagal episodes triggered by specific situations.
E.g. Coughing, urinating, having blood taken
Routine invitations in suspected vaso-vagal syncope
Full hx Collateral hx ECG Blood glucose Lying and standing BP
What is Wolff-Parkinson-White syndrome
Abnormal accessory conduction pathway connecting atria to ventricles = bundle of Kent.
Accessory pathway conducts faster than AV node
-> supra-ventricular re-entrant tachycardia / VT / VF
Syx of Wolff-Parkinson-white syndrome
Dizziness Palpitations Chest pain Syncope Sudden cardiac death
ECG changes in Wolff-Parkinson-white syndrome
Short PR
Wide QRS
Slurred upstroke of the R wave (delta wave)
Between which heart sounds does diastole occur?
Between s2 and s1
Between which heart sounds does systole occur?
Between s1 and s2
What causes s1 heart sound?
Mitral and tricuspid closure
What causes s2 heart sound?
Pulmonary and aortic valve closure
Why does a 4th heart sound occur?
Atrial contraction into a non-compliant or hypertrophied ventricle.
Occurs in HF, MI, cardiomyopathy, hypertension
Always abnormal
Le-lub dub
Why does a 3rd heart sound occur?
Normal in children / young adults / pregnancy
Rapid filling if ventricles
Can occur in a stiff or dilated ventricle e.g. HF, MI, cardiomyopathy, mitral regurgitation, aortic regurgitation, constrictive pericarditis
Lub-de-dub
signs of endocarditis
Splinter haemorrhages Clubbing (late) Oslers nodes / janeway lesions (rare) Changing / new murmur Splenomegally Microscopic haematuria Roth spots
What can splinter haemorrhages indicate
Nail bed trauma
Infective endocarditis
Vasculitis
Stages of clubbing
- Increased fluctuance of nail bed
- Loss of nail bed angle
- Curvature of the nail
- Expansion of the terminal phalynx
Causes of AF
Hypertension Ischaemic heart disease Hyperthyroidism HF Dilated cardiomyopathy Rheumatic heart disease Idiopathic
2 possible causes of an irregularly irregular pulse
AF
Ventricular ectopics
Best management of Wolff-Parkinson-White syndrome?
Radio-ablation of the accessory pathway
What features may suggest a silent MI
Atypical chest pain / epigastic pain SOB Acute pulmonary oedema Collapse Elderly / diabetic
What is brain natriuretic peptide a marker for?
Impaired LV function
Useful investigations in assessing HF
ECG BNP FBC U+E TFT C-XR Trans-thoracic echo
ECG features of hypokalaemia
Flattened or inverted t wave
ST depression
U wave =upward deflection following t wave
ECG changes in hyperkalaemia
Flat p wave
Broad QRS
Tented T waves
ECG changes in hypothermia
Bradyarrhythmias J waves (Osborne Waves) - upward deflection following R wave Prolonged PR, QRS and QT intervals Shivering artefact Ventricular ectopics Cardiac arrest due to VT, VF or asystole
What is Dressler’s syndrome
Tiad of pericarditis, fever and pericardial effusion.
Occurs 1-2 week spots MI
Why does coarctation of the aorta cause secondary hypertension
Mechanical obstruction to blood flow.
Causes hypo perfusion of the kidneys.
Causing activation of the renin-angiotensin-aldosterone cascade
Features of coarctation of the aorta
Proximal hypertension
Absent or reduced femoral pulses
Radio-femoral delay
Inter-scapular systolic murmur
Murmur of mitral regurgitation
Pansystolic murmur at apex radiates to axilla
Murmur of aortic sclerosis
Ejection systolic murmur at second intercostal space only
Murmur of aortic stenosis
Ejection systolic murmur at second intercostal
Radiates to carotids
Heart sounds in pericardial effusion
Muffled
When is an Austin flint murmur heard
Severe aortic regurgitation
Mid-diastolic low pitched rumbling murmur - loudest at apex
Murmur in aortic regurgitation
Early diastolic
High pitched
Left sternal edge
Leaning forward in held expiration
What is Libman-Sacks endocarditis
Noninfective endocarditis
Associated with SLE
What is CHA2DS2 VaSc used for
Determining risk of stroke in AF patients
And need for aspirin / anticoagulation.
Score 0 = nothing
Score 1 = aspirin
Score 2+ = warfarin
What are fibrates and when are they used
Hypo-lipidaemic agents - to lower cholesterol
Not used 1st line
Only used when statins are CI or not tolerated
ECG features of first degree heart block
Delay in AV conduction.
Prolonged PR - >0.2s (5small squares)
ECG features in second degree heart block - mobitz type II
P wave not always followed by QRS
No pattern to dropped beat
PR interval is constant
ECG features in second degree heart block - mobitz type I
AKA wenckebach
Progressive lengthening of PR interval then a dropped QRS
After dropped beat PR is shortest then gets longer each time again.
ECG features in third degree heart block
No AV conduction
P waves and QRS are completely independent
Patient signs of complete heart block
Bradycardia ~25 - 50 bpm
Cannon a waves in JVP
Which types of familial hypercholesterolaemia is more common
Heterozygous
1 in 500
Presentation of subacute bacterial endocarditis
Febrile illness
New cardiac murmur
Vasculitic rash
Microscopic haematuria
What criteria is used in the diagnosis of endocarditis
Duke criteria Major - +ve blood culture - echo evidence Minor - risk factors - fever >38 - vasculitic disease - blood culture or echo not meeting major criteria
Management of 3rd degree heart block
Dual chamber pacemaker = definitive
Acutely - ABC, temporary pacing wire, atropine, external pacing
When is a pistol shot over the femorals heard
aortic regurgitation.
pistol shot crack in time with systole.
= Traube’s phenomenon
What is sick sinus syndrome
Dysfunctional SA Node
Bradycardia interspersed with tachycardia and AV block
Management of sick sinus syndrome
Pacemaker
Anticoagulation
Most common cause of bacterial endocarditis
Viridans streptococcus Staphylococcus aureus (IVDU) staphylococcus Epidermidis (prosthetic valves) Enterococcus faecalis (Catheter, cystoscopy, coloscopy)
Management of pericarditis
NSAIDs
Commonest cause of cardiac chest pain in the <35s
Cocaine associated angina
What are the shockable rhythms
Pulseless VT
VF
What are the non-shockable rhythms
Pulseless electrical activity
Asystole
Causes of dilated cardiomyopathy
Post viral myocarditis Alcohol Drugs Familial Thyrotoxicosis Haemochromatosis
Management of a supra ventricular tachycardia (SVT)
Vagal manoeuvres - valsalva, carotid sinus massage
Adenosine
Cardioversion
(Then prevention with beta-blockers or verapamil)