Cardiology Flashcards
Nicorandil MOA and Side Effects ?
a nitrate and a non-selective potassium channel activator
GI ulcers including Anal Ulcers, Upset, Headaches Flushing
Investigations for DVT and/or PE in Pregnancy ?
If Pregnant and Suspicious of DVT —> Duplex USS
If Pregnant and No DVT on USS –> V/Q
Valve Replacement concepts
Aspirin - Bioprosthetic (A –> B)
Warfarin (+ Aspirin) - Mechanical (W –> upside down = M)
INR targets
2.5 for A fib and PE/DVT
3.0 for aortic valve
3.5 for recurrent DVT
3.5 for mitral vale AM
The following factors favor choice of a mechanical valve:
-For aortic valve replacement, age <55 years
-For mitral valve replacement, age <70 years
-No contraindication to anticoagulation with a vitamin K antagonist (VKA)
-Presence of an additional indication for anticoagulation (eg, an existing mechanical valve)
-High-risk of morbidity/mortality with reintervention (eg, porcelain aorta)
The following factors favor choice of a bioprosthetic valve:
-Patient’s life expectancy is shorter than the expected effective longevity of a bioprosthetic valve
-Reoperation after mechanical valve thrombosis occurring despite good long-term control of anticoagulation and absence of structural defects
-Anticoagulation with a VKA is contraindicated, cannot be managed appropriately, or is not desired by the patient.
Associations with Patent Foramen Ovale
Migraine
Aortic Stenosis Facts
Crescendo - Decrescendo Ejection Systolic Murmur
Opening Snap
Narrow Pulse Pressure
Slow Rising Pulse
Soft S2 + Paradoxical Splitting
Stroke Adam Attack
Management of Aortic Stenosis
If Asymptomatic -
Watch and Wait
No nitrates/ACEi - decrease afterload and precipitate hypotension
If
1. Symptomatic
2. BP drop on exercise tolerance test
3. Heart failure
4. Pulmonary hypertension
5. Severe stenosis <0.6cm2
6. Valvular Gradient > 40mmHg + LVH
Then TAVI/Open
Often Coronary Angio Prior TRO CAD
If TAVI/Open Contraindicated –> Balloon valvuloplasty
Acute Idiopathic/Viral Pericarditis Management
1st Line - NSAIDs + Colchine for 3 months
2nd Line - NSAIDs + Steroids + Colchicine
3rd Line - Azathioprine or IVIG + Anakinra
Long QT Syndrome Drugs and Other Causes
AntiArrythmics - Amiadarone , Sotalol - Class 1a
AntiBiotics - Erythromycin
AntiCsyhotics - Haloperidol, Quetiapine, Risperidone
AntiDepressants - SSRI, TCA
AntiEmetics - Ondansetron
Romano Ward
Jervell-Lange-Nielsen syndrome
HypoCalcemia
HypoKalemia
HypoThermia
ACS
SAH
Complications Post MI
0-24 hours
Sudden Cardiac Death
Ventricular Arrythmias
Acute Left Ventricular Failure (Most Important Predictor of Post MI Outcome - Killip Class)
1-3 days
Fibrinous Pericarditis
3-7 days
Papillary Muscle Rupture and MR
Left Ventricular Free Wall Rupture
Pseudoaneurysm
Ventricular Free Wall Rupture
7 days - 6 weeks
Dressler Syndrome
Reinfarction
CCF
Centrally Acting Antihypertensives
MMC
methyldopa
moxonidine
clonidine
DVLA Guidelines
successful catheter ablation 2 days
pacemaker insertion 1 week
Prophylactical ICD 1 month
sustained ventricular arrhythmia with ICD
6 months
PCI 1 week
ACS 1 month but 1 week if successfully treated with Angioplasty
CABG 1 month
Heart transplant 6 weeks
aortic aneurysm of 6cm annual review
aortic aneurysm of 6.5 cm disqualifies patients from driving
ICD G.2 Permanent
HTN G.2 Permanent BP Sys >180 , Dias >100
HF G.2 EF <40 or symptomatic
Angina Permanent if happened in rest
Brugada , WPW and Jervell and Lange-Nielsen Syndrome Genes
SCN5A - Brugada (+ KCNE3, CACNB2)
PRKAG2 - Wolff-Parkinson White
KCNQ1 - Jervell and Lange-Nielsen syndrome + hearing loss
Pulmonary
Hypertension
Causes
HIV
Cocaine
Anorexigens (e.g. fenfluramine)
10% Autosomal Dominant
Clinical Signs
Large A waves
Right Parasternal Heave
Loud P2
Tricuspid Regurgitation
Management
Stabilize + Anticoagulated for ?PE because of Right Heart Strain
Acute Vasodilator Testing
If + response = Oral CCB
If - response
- prostacyclin analogues: treprostinil, iloprost
- endothelin receptor A antagonists - Teratogenic / Limb Edema Common SE
2.1 non-selective: bosentan (deranged LFTs)
2.2 selective : ambrisentan - phosphodiesterase inhibitors: sildenafil
Heart Transplant if progressive Symptoms
Differentials for REGULAR Broad Complex Tachycardia
Ventricular tachycardia (VT)
Supraventricular tachycardia (SVT) with aberrant conduction due to bundle branch block
SVT with any metabolic disturbance that slows supraventricular action potential propagation — hyperkalaemia, sodium channel blockade, severe acidosis
Antidromic AVRT — re-entrant tachyarrhythmia seen in Wolff-Parkinson-White syndrome
Accelerated idioventricular rhythm (AIVR)
Drug Contraindicated in Ventricular Tachycardia
Verapamil
Furosemide inhibits Na/K/2Cl- in the Ascending or Descending Limb of the Loop of Henle
Thick Ascending Limb
Mechanism of Action of Hydralazine
Increases cGMP causing smooth muscle dilatation to a greater extent in ARTERIOLES > VEINS
Long QT Syndrome due to Gain of Function or Loss of Function of Na or K channels
Loss of Function
K Channels
Which Cardiac Marker Rises First ?
Myoglobin
Which Cardiac Marker is used for re-infarction ?
CK-MB - returns to normal after 2-3 days
Troponin T - elevated for 10 days
Wolf Parkinson White Syndrome Associations
HOCM
Mitral valve prolapse
Ebstein’s anomaly
Thyrotoxicosis
Secundum ASD
Differentiating Type 1 and Type 2 WPW Syndrome
Type A (left-sided pathway): dominant R wave in V1 & Right Axis Deviation
Type B (right-sided pathway): no dominant R wave in V1 & Left Axis Deviation
Hypertension in Pregnancy defined by
systolic > 140 mmHg or diastolic > 90 mmHg
or an increase above booking readings of > 30 mmHg systolic or > 15 mmHg diastolic
Difference between Chronic HTN , Gestational Hypertension and Pre-Eclampsia
> 140/90 before Pregnancy or before 20 weeks
Gestational Hypertension - AFTER 20 week WITHOUT proteinuria/edema
Pre-eclampsia - AFTER 20 weeks WITH proteinuria/edema
If High Risk take 75mg Aspirin OD from 12 weeks