Cardiology Flashcards
What is first line treatment for heart failure?
ACEi and beta-blocker - one at a time
Do ACEi and beta-blockers have any improvement on mortality when ejection fraction is preserved?
No
What is the second-line treatment of heart failure?
Aldosterone antagonist - e.g. spironolactone
Which vaccinations should pts with heart failure receive?
Annual flu + one-off pneumococcal
How should angina be managed when they have failed to respond to a beta-blocker?
Initiation of a calcium channel blocker
What types of CCB are amlodipine, nifedipine etc.?
Long-acting dihydropyridine
What types of CCB should not be used in conjunction with beta-blockers?
Diltiazem and verapamil are rate-limiting CCBs and should not be used in combination with a beta-blocker as they can result in life-threatening bradycardia and heart failure
What can be used when a dihydropyridine CCB is contraindicated or not tolerated?
Ivabradine - as long as HR>70, and on specialist advice
or Nicorandil
If an AF patient has a TIA or stroke, what is the anticoagulant of choice?
Warfarin or a direct thrombin or factor Xa inhibitor
In acute stroke, when should anticoagulation therapy begin?
2 weeks later (later, if very large infarction)
How does aortic regurgitation present?
Diastolic murmur loudest over the aortic valve and wide pulse pressure
How does aortic stenosis present?
Systolic murmur with narrow pulse pressure
How does mitral regurgitation present?
Systolic murmur loudest over the mitral valve
How does mitral stenosis present?
Diastolic murmur but it would be loudest over the mitral valve and would not have the characteristic wide pulse pressure
How does pulmonary regurgitation present?
Diastolic murmur but it would be the loudest over the 2nd intercostal space on the left and would not have the wide pulse pressure
What is De Musset’s sign?
Head bobbing associated with AR
What are the causes of AR?
Valve issues: Rheumatic fever Infective endocarditis Connective tissue diseases e.g. RA/SLE Bicuspid aortic valve
Aortic root disease: Aortic dissection Spondylarthropathies (e.g. ank spond) HTN STS Marfan's/Ehler-Danlos syndrome
What is the difference between Janeway lesions and Oslers nodes?
Oslers nodes = painful
What are the microbial causes of IE?
Staphylococcus aureus
Streptococcus viridans
Coagulase-negative Staphylococci such as Staphylococcus epidermidis
Streptococcus bovis
What is a PESI score?
Allows calculation of PE severity, and work out which patients may be managed in an outpatient basis
What types of antibiotics can cause torsades de pointes?
Macrolides - e.g. clarithromycin
What is torsades de pointes?
A form of polymorphic ventricular tachycardia associated with a long QT interval. It may deteriorate into ventricular fibrillation and hence lead to sudden death
What are the causes of long QT syndrome?
GENETIC - LQT1 / LQT2 (potassium channel mutation); LQT3 (sodium channel mutation); Jervell and Lange-Nielsen syndrome (associated with deafness); Romano-Ward syndrome
ELECTROLYTES - Hypocalcaemia; Hypomagnesaemia; Hypokalaemia
DRUGS - Antiarrhythmics (e.g. amiodarone, sotalol); Antibiotics (e.g. erythromycin, clarithromycin, ciprofloxacin); Psychotropic drugs (e.g. serotonin reuptake inhibitors, tricyclic antidepressants, neuroleptic agents)
When should fibrinolysis be offered in STEMI patients?
Fibrinolysis should be offered within 12 hours of onset of symptoms if primary PCI cannot be delivered within 120 minutes
When can you abandon PE as a differential?
When a 2-level Well’s score =4 AND d-dimer = NEG
In whom is cardiac resynchronisation recommended?
Patients with left ventricular dysfunction, ejection fracture <35% and QRS duration >120ms
In whom is an ICD recommended?
Patients with previous sustained ventricular tachycardia, ejection fraction <35% and symptoms no worse than class III of of the New York Heart Association functional classification
What are the possible ECG features of WPW?
Short PR interval
Wide QRS complexes with a slurred upstroke - ‘delta wave’
Left axis deviation if right-sided accessory pathway, right axis deviation if left-sided accessory pathway*
What are the associations with WPW?
HOCM Mitral valve prolapse Ebstein's anomaly Thyrotoxicosis Secundum ASD
How is WPW managed?
Definitive treatment - radiofrequency ablation of the accessory pathway
Medical therapy - sotalol, amiodarone, flecainide
What is the anti-HTN of choice in T2DM?
Patients with a background of type 2 diabetes that receive a diagnosis of hypertension should be started on an ACE inhibitor (or angiotensin receptor blocker) regardless of age
What is amiodarone used in the Mx of?
Regular broad complex tachycardias without adverse features
What is adenosine used in the Mx of?
Treatment of supraventricular tachycardia (SVT). SVT would be a regular, narrow complexed tachycardia
What degree of renal impairment would make you consider stopping an ACEi initiated for HTN?
> 30% rise in creatinine
>25% reduction in eGFR
Which angina med can cause anal ulcers?
Nicorandil
What is the first line Mx of SVT?
Carotid sinus massage or Valsalva manoeuvre
What medication can be given to treat an SVT?
Adenosine - 6mg–>12mg–>12mg
Adenosine is contraindicated in asthma, verapamil is the preferable option then
What are the features of Buerger’s disease/
Extremity ischaemia - intermittent claudication and ischaemic ulcers
Superficial thrombophlebitis
Raynaud’s phenomenon
How does the CHA2DS2VS score determine anticoagulation strategy?
0 = no anticoagulation 1 = Males, consider treatment. Females = no treatment 2 = Females, consider treatment
What are the ECG features of hypokalaemia?
- U waves
- Small or absent T waves (occasionally inversion)
- Prolong PR interval
- ST depression
- Long QT
What is Mobitz type I heart block?
Progressive prolongation of the PR interval until a dropped beat occurs
What is Mobitz type II heart block?
PR interval is constant but the P wave is often not followed by a QRS complex
What are the features of cardiac tamponade?
- Hypotension
- Raised JVP
- Muffled heart sounds
What may be found on an ECG in LVH?
The ECG shows large R waves in the left-sided leads (V5, V6) and deep S-waves in the right-sided leads (V1, V2). There is also ST elevation in leads V2-3. These findings are consistent with left ventricular hypertrophy. Furthermore, there is also T-wave inversion present in leads V5 and V6, known as the left ventricular ‘strain’ pattern.
What type of replacement valve is used in younger people?
Mechanical
What is the target INR with mechanical aortic valves?
3.0
What is the target INR with mechanical mitral valves?
3.5
How is bradycardia with signs of shock managed?
- Atropine, up to maximum of 3mg
- Transcutaneous pacing
- Isoprenaline/adrenaline infusion titrated to response
What are the adverse effects of loop diuretics?
Hypotension Hyponatraemia Hypokalaemia, hypomagnesaemia Hypochloraemic alkalosis Ototoxicity Hypocalcaemia Renal impairment (from dehydration + direct toxic effect) Hyperglycaemia (less common than with thiazides) Gout
What is the recommended treatment for regular broad complex tachycardia?
Amiodarone
Which drug is contraindicated in VT?
Verapamil - can precipitate a cardiac arrest in this instance
Which group of drugs are contraindicated in renovascular disease?
ACEi
Which anti-anginal drug can patients develop tolerance to?
Nitrates - e.g. isosorbide mononitrate
What is the most specific ECG sign of pericarditis?
PR depression
Which drug is strongly indicated when heart failure and AF co-exist?
Digoxin
What is Dressler’s syndrome?
2-6 weeks following a MI. The underlying pathophysiology is thought to be an autoimmune reaction against antigenic proteins formed as the myocardium recovers. It is characterised by a combination of fever, pleuritic pain, pericardial effusion and a raised ESR. It is treated with NSAIDs
What are the signs of a left ventricular anyeursm?
Persistent ST elevation + left ventricular failure
What is a ventricular septal defect?
Usually occurs in the first week and is seen in around 1-2% of patients.
Features: acute heart failure associated with a pan-systolic murmur.
An echocardiogram is diagnostic.
How does acute mitral regurgitation occur and present?
More common with infero-posterior infarction and may be due to ischaemia or rupture of the papillary muscle.
Acute hypotension and pulmonary oedema may occur.
An early-to-mid systolic murmur is typically heard.
Patients are treated with vasodilator therapy but often require emergency surgical repair.
How does left ventricular free wall rupture present?
Occurs around 1-2 weeks afterwards.
Patients present with acute heart failure secondary to cardiac tamponade (raised JVP, pulsus paradoxus, diminished heart sounds).
Urgent pericardiocentesis and thoracotomy are required.
What are normal ECG variants in athletes?
- Sinus bradycardia
- 1st degree atrioventricular block
- Wenckebach phenomenon (2nd degree atrioventricular block Mobitz type 1)
- Junctional escape rhythm
What are the signs of HOCM?
Midsystolic murmur heard best at the left lower sternal border.
It was louder with the Valsalva manoeuvre.
An echocardiogram (ECHO) reported mitral regurgitation, systolic anterior motion of the anterior mitral valve leaflet, asymmetric hypertrophy and left ventricular outflow tract obstruction.
which congenital heart defect can cause biventricular hypertrophy?
Ventricular septal defect
How should tachycardia with adverse features be managed?
Synchronised DC shock (up to 3) –> followed by amiodarone 300mg + further shock –> then 900mg over 24 hours
Which drug can shorten the QT interval?
Digoxin
How is a <3cm AAA managed?
Discharge
How is a 3-4.4cm AAA managed?
Yearly screening
How is a 4.5-5.4cm AAA managed?
3/12 screening
How is a 5.5cm AAA managed?
Referral for repair
When may a patient drive again after successful angioplasty, with no further need for treatment?
1 week
What is the most common defect in Marfan’s syndrome?
Aortic root dilatation –> lead to aortic regurgitation
What are the features of Tetralogy of Fallot?
- Pulmonary Stenosis
- Right Ventricular Hypertrophy
- Overriding Aorta
- Ventricular Septal Defect
How does apixaban work?
Direct factor Xa inhibitor
What does CREST stand for?
C - calcinosis R - Raynaud syndrome E - esophageal dysmotility S - sclerodactyly T - telangectasia
What valve score should lead you to consider open valve repair?
> 9
What are the Major Criteria of the Jones Criteria for Rheumatic Fever?
- Arthritis
- Carditis
- Chorea
- Subcutaneous nodules
- Erythema marginatum
Which methods may be used for aortic valve replacement in those unsuitable for traditional surgery?
Balloon valvuloplasty or TAVI
Which patients with MR are not recommended for surgery?
LVEF <30%
What type of drug is indapamide?
Thiazide-like diuretic
How quickly should metformin be titrated?
No quicker than weekly
Which vessel is implicated in an anteroseptal MI, and what ECG changes would you expect to see?
Left anterior descending - V1-V4
Which vessel is implicated in an inferior MI, and what ECG changes would you expect to see?
Right coronary - II, III, aVF
Which vessel is implicated in an anterolateral MI, and what ECG changes would you expect to see?
Left anterior descending or left circumflex - V4-V6, I, aVL
Which vessel is implicated in a lateral MI, and what ECG changes would you expect to see?
Left circumflex - I, aVL, +/- V5-V6
Which vessel is implicated in an posterior MI, and what ECG changes would you expect to see?
Usually left circumflex, also right coronary - tall R-waves V1-V2
What type of MI causes changes to V1-V4?
Anteroseptal MI
What type of MI causes changes to II, II, aVF?
Inferior MI
What type of MI causes changes to V4-V6, I and aVL?
Anterolateral MI
What type of MI causes changes to I, aVL +/- V5-V6?
Lateral MI
What type of MI causes tall R waves in V1-V2?
Posterior MI
After trying an ACEI, Ca2+-blocker and a thiazide-like diuretic, if K+ is =4.5, which anti-HTN should be given?
Spironolactone
After trying an ACEI, Ca2+-blocker and a thiazide-like diuretic, if K+ is >4.5 which anti-HTN should be given?
Alpha or beta-blocker
Which type drug should not be prescribed with verapamil because of a potential for profound bradycardia?
Beta-blockers
Which type of anti-hypertensives are contraindicated in heart failure?
Calcium channel blockers
How do you distinguish between myocarditis and pericarditis?
Myocarditis = raised troponin
What factors can falsely increase BNP?
- Left ventricular hypertrophy
- Ischaemia
- Tachycardia
- Right ventricular overload
- Hypoxaemia (including pulmonary embolism)
- GFR < 60 ml/min
- Sepsis
- COPD
- Diabetes
- Age > 70
- Liver cirrhosis
What factors can falsely decrease BNP?
- Obesity
- Diuretics
- ACE inhibitors
- Beta-blockers
- Angiotensin 2 receptor blockers
- Aldosterone antagonists
What drug is given to manage Raynaud’s?
Nifedipine
What are the 6 P’s of acute ischaemic limb?
Pale Painful Pulseless Paralysed Paraesthesia Perishingly cold
Which drug is most commonly used in malignant hypertension?
IV sodium nitroprusside
What is the first line treatment for stable angina?
Beta-blocker or calcium channel blocker (e.g. verapamil)
What are the causes of LBBB?
Cardiomyopathy
Idiopathic fibrosis
HTN
Ischaemic heart disease
What are the causes of RBBB?
Cor pulmonale
Cardiomyopathy
What should patients receive after PCI?
Prasugrel + aspirin