Cardiovascular Flashcards
what are clinical signs of unstable angina?
Chest pain with increasing frequency
Can occur at rest
Can have a fourth heart sound
what are differentials of pleuritic chest pain?
- pleurisy
- pneumothorax
- pneumonia
- pericarditis
- PE
what are risk factors of coronary artery disease?
- male over 60
- smoking
- hypertension
- high LDL/ low HDL
- diabetes
- inactivity
- obesity
- family history
- drug use
what are symptoms of an acute MI?
- chest pain that can radiate to the left arm or jaw
- dyspnoea
- pallor
- hypotension
- tachycardia
- dizzy
how can a MI be diagnosed?
- risk factors
- ECG
- troponin
- angiogram
what is the immediate management for MI?
- pain relief (morphine and an anti emetic)
- oxygen
- aspirin
what is the further management of a stemi?
- PCI if they present within 12 hours of onset and can get PCI within 120 minutes
- if PCI can’t be given within 120 minutes then fibrinolytic treatment/thrombolysis
in MI when PCI can’t be offered what is often used for thrombolysis?
alteplase
reteplase
what ECG leads are for the anterior section of the heart?
V1-V4
what coronary artery supplies the anterior section of the heart?
left anterior descending
what coronary artery supplies the inferior section of the heart?
right coronary artery
what leads correspond to the inferior section of the heart?
- II,III, AVF
what leads correspond to the lateral aspect of the heart?
- V5-V6
what artery supplies the lateral aspect of the heart?
- left circumflex
what leads correspond to the posterior heart?
V8,9
What supplies the posterior heart?
right circumflex
what long term primary care drug therapy can be given after MI?
ACE inhibitor
dual antiplatelet therapy: ticagrlor with aspirin
beta blocker
statin
what is the P wave of an ECG?
- atrial depolarisation
what is QRS of an ECG?
- depolarisation of the ventricles
what is ST of an ECG?
- the plateu of an action potential
what is the T wave of an ECG?
repolarisation
what is the cause of a bifid P wave in lead II?
P.mitrale caused by mitral stenosis
what is the ECG change in first degree heart block?
- a fixed PR interval over 0.2
what is the ECG change in mobitz I?
a gradual increase in the PR interval then it drops
what is the ECG change in mobitz II?
PR interval is constant then drops at random
what change shows an ECG ‘saw tooth’ pattern?
Atrial flutter
what are delta waves a sign off?
wolff Parkinson white
what chest pain can be reported by someone with arrhythmias?
- palpitations
- chest pain
- syncope
- hypotension
- pulmonary oedema
what is AVNRT?
- a supraventricular tachycardia
There is a re-entrant loop in the node itself that can send impulses up into the atria or down into the ventricles.
what can terminate AVNRT?
vagal discharge
what is AVRT?
- a supraventricular tachycardia
- an accessory pathway so two circuits are running.
Normal pathway via AVN and the accessory pathway.
what are clinical features of the supra-ventricular tachycardias? (AVNRT and AVRT)
rapid palpitations anxiety dizzy central chest pain weakness polyuria
what are causes of atrial fibrillation?
- alcohol
- pneumonia
- hyperthyroidism
- PE
- mitral valve pathology
- pulmonary hypertension
what are extrinsic causes of sinus bradycardias?
- hypothermia
- hypothyroidism
- cholestatic jaundice
- raised intracranial pressure
- beta blockers
what are intrinsic causes of sinus bradycardias?
- acute ischaemia
- chronic degenerative changes
what are causes of complete heart block?
- autoimmune; SLE
- structural heart disease ; transposition of the great vessels
- levs disease
- lenegres disease
- acute MI
- ischaemic cardiomyopathy
- calcific aortic stenosis
- digoxin, beta blockers, calcium channel blockers
endocarditis, lyme disease
what are causes of general bradycardias?
D- drugs (aantiarrythmics, beta blockers, calcium channel blockers, digoxin
I- ischaemic/ infection
V- vagal hypertonia (athletes, vasovagal syncope, carotid sinus syndrome
I- infection: viral myocarditis, rheumatic fever, infective endocarditis
S- sick sinus syndrome
I- infiltration/ restrictive. autoimmune, sarcoid, haemochromatosis, amyloid, muscular dystrophy
O- hypothyroidism, Hypokalaemia, hypothermia
N- neuro; raised ICP
what is the pattern in an ECG of ventricular tachycardia?
Broad complex tachycardia (tomb stone)
what is the management of heart block?
asymptomatic and over 40bpm- no need for treatment
symptoms and below 40bpm- atropine
no response with atropine; pacing wire