__Y6 Passmed Points Flashcards
What do these all show?
HBsAg
Anti-HBs
Anti-HBc
HBeAg
HBsAg normally implies current acute disease
Anti-HBs implies immunity (either prev exposure or immunisation)
Anti-HBc implies previous (or current) infection
HBeAg is a marker of infectivity as it results from breakdown of core antigen from infected liver cells
What do these results show?
1) Anti-HBs + Anti-HBc
2) Anti-HBs alone
1) immune due to prev infection
2) immune due to vaccination
Histology of coeliac disease?
Villous atrophy, raised intra-epithelial lymphocytes, crypt hyperplasia, lamina propria infiltration with lymphocytes
Blood marker for Coeliac disease?
Diagnosis by TTG abs (also EMA)
Villous atrophy, raised intra-epithelial lymphocytes, crypt hyperplasia, lamina propria infiltration with lymphocytes
Coeliac disease
Severity score for UC flares?
Truelove and Witts
Markers of severe UC flare?
Truelove and Witts severity score
> 6 stools a day, containing blood with evidence of any systemic disturbance (fever, tachy, abdo distension, anaemia, ESR)
Define toxic megacolon
transverse colon >6cm in combo with signs of systemic upset
Need to urgency decompress bowel ± surgery if not improved within 24 hrs
Inducing remission in UC flare
Oral aminosalicylates e.g. mesalazine
Oral pred 2nd line if no improvement
if severe manage in hosp with IV steroids
Maintaining remission in UC
Oral aminosalicylates, azathioprine and mercaptopurine
Inducing remission in Crohn’s flare
- Oral pred if mild
- IV hydrocort if severe
- (2nd line 5-ASA e.g. mesalazine, less effective)
If conventional therapy unsuccessful start biologic therapy (anti-TNFα agents e.g. infliximab or adalimumab)
Azathioprine or mercaptopurine as add on therapy
Maintaining remission in Crohn’s disease
Azathioprine/mercaptopurine
2nd line methotrexate
Criterea for diagnosis of malnutrition
Any one of:
BMI < 18.5kg/m²
Unintentional weight loss > 10% within the last 3-6 months
BMI <20kg/m² + unintentional weight loss > 5% within the last 3-6 months
RF for acute mesenteric ischaemia
AF, HTN, T2DM
Acute hx of bloody diarrhoea with intense abdo pain out of proportion to signs
Acute mesenteric ischaemia
1st line investigation in suspected acute mesenteric ischamia
check for high lactate
Most common site for ischaemic colitis?
Watershed areas eg. splenic flexure
Upper GI bleed scores
Blatchford score (first assessment) - incl. urea, Hb, sysBP
Rockall score after endoscopy
Upper GI bleed vs lower GI bleed?
Check urea
High urea levels suggest upper (breakdown of RBC in stomach act as ‘protein meal’)
1st line intervention to stop variceal bleed
Band ligation
Acute pancreatitis cause
GET SMASHED
Gallstones ETOH Trauma Steroids Mumps Autoimmune Scorpion bite Hyper-trig/Ca, hypothermia ERCP Drugs - azathiprine, mesalazine, bendroflum, sodium val
Abdo pain with relief on defaction, mucus passage, lethargy, nausea, feeling of incomplete evacuation
IBS
Primary biliary cholangitis
Definition and markers
AI condition, characterised by damage to intra-lobular bile ducts by chronic inflammation
leads to progressive cholestasis and cirrhosis
IgM, anti-Microbial abs, M2 subtype
Treatment of IBS
Loperamide (for diarrhoea), antispasmodic agents (for pain), laxatives (for constipation)
Autoimmune hepatitis abs
Anti-nuclear abs (ANA) and anti-smooth muscle abs (SMA)
Most common causes of cirrhosis
Alcohol, NAFLD, viral hep (B, C)
Investigation of choice to detect liver cirrhosis?
Transient elastography (Fibroscan)
Grading of hepatic encephalopathy
I – irritability
II – confusion, inappropriate behaviour
III – incoherent, restless
IV – coma
Define achalasia
Key signs
Failure of oesophageal peristalsis and of relaxation of the lower oesophageal sphincter
Due to degenerative loss of ganglia from Auerbach’s plexus
Key signs -
Dysphagia (both solids and liquids), heartburn, regurgitation of food
Melanosis coli
Seen with laxative abuse
Disorder of pigmentation of the bowel
Hepatorenal syndrome types
Type 1 – rapidly progressive, rapid onset (<2 weeks), usually due to acute event e.g. upper GI bleed
Type 2 – slowly progressive, gradual decline in renal function, assoc ascites
Colon cancer genetic cause
and mode of inheritance
95% sporadic
Most common inherited:
HNPCC - hereditary non-polyposis colorectal carcinoma (auto dom)
Rarer:
FAP - familial adenomatous polyposis (auto dom)
Diagnostic marker of carcinoid syndrome
5 HIAA diagnostic marker – measure in 24 urine collection
Numerous harmartomatous polyps in GI tract + pigmented freckles on lips, face, palms, soles
Peutz-Jeghers
Spontaneous rupture of the oesophagus due to +++vomiting
→ Vomiting, thoracic pain, subcutaneous emphysema (crepitus)
Boerhaave syndrome
Persistent ST elevation after previous MI?
Very suggestive of a left ventricle aneurysm
Most common cause of drug-induced angioedema?
ACE inhibitors
What are varenicline and bupropion?
Varenicline (nicotine receptor partial agonist) or bupropion (NA and DA reuptake inhibitor and nicotinic antagonist) for smoking cessation
P mitrale
Bifid p wave with LA enlargement/hypertrophy
Enlarged LA makes a greater contribution to P wave contour
Most commonly due to mitral stenosis
ASD murmur
Ejection systolic, radiates through to back, fixed splitting of S2, beware paradoxical embolisms (→ stroke)
Aortic stenosis common causes:
Young pts <65 years – bicuspid aortic valve
Older pts >65 years – calcification
Also: post-rheumatic disease, HOCM
At what QRISK2 score are statins recommended?
Statins should be given to all pts with QRISK2 (10yr CV risk score) of ≥ 10%
Doses of statin for primary and secondary prevention?
Primary prevention (QRISK2 >10%, most T1DM, CKD if eGFR<60) → 20mg Atorvastatin
Secondary prevention (known IHD, CVD, peripheral artery disease) → 80mg Atorvastatin
When should Warfarin be stopped presurgery and what INR should be aimed for?
Warfarin pre-surgery - usually stopped 5 days before
Surgery can proceed once INR is <1.5
Warfarin and bleeding
Management of a bleed
Any major bleed → stop warfarin, give IV vit K, give prothrombin complex concentrate
If minor bleeding but INR >8 → stop warfarin, give IV vit K
If INR 5-8 → withhold next warfarin and reduce maintenance dose
ALS protcol for CPR
After three defib attempts what can be given?
Give amiodarone 300mg IV and adrenaline 1mg after three defib attempts
(Can give further adrenaline 1mg IV after alternate shocks)
Post-MI treatment to send pt home on
ACE-i BB Statin Aspirin Clopidogrel (for 1st month, can continue)
Side effects of BB
Bronchospasm, cold peripheries, fatigue, sleep disturbance (nightmares)
Contraindictions for BB
Asthma, SSS, uncontrolled HF
Cannot be given alongside non-dihydropyridine e.g. verampamil or diltiazem
Pulsus alternans
Definition and condition seen in?
Alternation of the force of arterial pulse, seen in severe LVF
Bisferens pulse
Definition and condition seen in?
Double pulse with two systolic peaks seen in mixed aortic valve disease and occ HOCM
‘Jerky’ pulse seen in:
seen in HOCM
Pulsus paradoxus
Definition and condition seen in?
Greater than normal (>10mmHg) fall in sys BP with inspiration (fainter pulse with insp)
Seen in severe asthma or cardiac tamponade
Conditions to consider of ↑JVP, persistent hypotension and +++tachy despite fluid resus in pt with chest wall trauma
Cardiac tamponade
Tension pneumothorax
Most common valvuar abnormality in PKD?
Mitral valve prolapse
Most common cause of mitral stenosis?
Rheumatic fever
Marker for Churg Strauss disaese
p-ANCA
Hx asthma and nasal polyps, ↑eosinophilia, impaired kidney function, petechial rash
Churg Strauss disaese
Aka eosinophilic granulomatosis with polyangiitis
Marker for Wegener’s granulomatosis
cANCA
Affects upper resp tract and kidneys
Nose bleeds, rhinitis, conjunctivitis, saddle nose, rapidly progressing glomerulonephritis, pulm nodules, arthritis
Wegener’s granulomatosis aka granulomatosis with polyangiitis
ECG features of hypokalaemia
- U waves
- Small or absent T waves (occasionally inversion)
- Prolong PR interval
- ST depression
- Long QT (>600ms)
J wave (Osborn wave)
Seen in hypothermia
Hypothermia ECG findings
J waves (Osborn waves) Bradycardia, 1st degree HB, long QT, other arrythmias
Inheritance pattern of HOCM
Auto dom
Acute pericarditis ECG findings
Saddle-shaped ST elevation (‘concave) and PR depression on ECG
Causes of acute pericarditis
Viral infection, TB, uraemia, trauma, post MI, CTD, hypothyroid
Notching of the inferior border of the ribs on CXR
Coarctation of the aorta
Aortic obstruction → dilated intercostal collateral vessels (allow sufficient blood flow to descending aorta) → increased pressure of these vessels erodes the inf margin of ribs
Tx for pt with bradycardia and signs of shock
500micrograms of atropine (repeated up to max 3mg)
Management of AF
When to use rate vs rhythm
NICE say offer RATE as 1st line, unless AF due to reversible cause, presence of HF (due to AF), new-onset AF
Or if rhythm more suitable based on clinical judgement
–
Rate control with BB (e.g. bisoprolol)
If required can add diltiazem or digoxin
Rate favoured if >65 years, or hx IHD
–
Rhythm control with amiodarone + flecainide (to cardiovert to sinus)
Sotalol also used to maintain sinus rhythm
Favoured if <65years, symptomatic, first pres, lone AF, CHF
Also if AF due to a reversible cause (e.g. infection)
Management of AF post-stroke
Aspirin for 2 weeks then start life-long anticoag
Normal QT intervals
How is it measured?
Normal QT should be <430ms in males, <450ms in females
QT interval between START of Q wave and END of T wave
Causes of Long QT syndrome
Causes:
- Congenital
- Drugs – amiodarone, sotalol, TCAs, SSRIs, methadone, erythromycin, haloperidol, chloroquine
- Hypo-Ca/K/Mg, acute MI, myocarditis, hypothermia, SAH
Management of long QT syndrome
Avoid precipitants (e.g. strenuous exercise, swimming, stress)
Beta-blockers ± ICD in high risk cases (if QTc >500ms or prev cardiac arrest)
Management of SVT
Acute management:
1. Vagal manoeuvres e.g. Valsalva
2. IV adenosine 6mg → 12mg → 12mg (verapamil in asthmatics)
Adenosine has a 10s half-life so must be given fast through a central route or large calibre vein (16G cannula)
3. Electrical cardioversion
Management of VT
Give amiodarone 300mg over 10-20mins
Then 900mg over 24 hrs
If this fails or adverse signs (BP<90, CP, HF, syncope) then shock
Management of torsades des pointes
IV magnesium sulphate
Define pathological Q wave
Older but simpler definition of pathological Q wave:
Q wave ≥0.04 s and amplitude ≥25% R wave in that lead
Now newer definition with parameters dependent on lead
Assoc with prev MI