cardiovascular Flashcards
3 types of cardiac ischaemia
STEMI - complete blockage of coronary artery
NSTEMI - supply and demand mismatch
unstable angina - supply and demand mismatch (ischaemia not infarction)
signs of chest pain caused by ischaemia
worse with exertion
doesn’t change with body positioning
not relieved with rest
radiates to
- epigastrium
- left shoulder/arm
- neck
- lower jaw
what is orthopnea
shortness of breath that occurs while lying flat and is relieved by sitting or standing
diaphoresis
abnormally excessive sweating
treatment for ACS
MONA
- morphine
- O2
- nitrate
- high dose aspirin
high dose statin
beta blocker eg metroprolol
first line of action when someone arrives with chest pain
- ECG
- history + physical
- if show signs of ischaemia eg chest discomfort., pressure, tightness, burning, syncope, dyspnea, diaphoresis, nausea/vomiting
–> measure troponin
signs of cardiogenic shock
pale skin
tachycardia
hypotension
cool extremities
diaphoresis
signs of acute heart failure
jugular venous distension
crackles on lung auscultation
new S3 gallop
murmur
orthopnea
edema
if a man with stable angina presents with change in baseline gain, new onset pain at rest, what is a likely diagnosis
ACS
how may women or older patients with stable angina present with ACS
dyspnea instead of new onset chest pain
signs of ongoing ischaemia >12 hours after symptom onset in ACS
refractory chest pain
haemodynamic instability
ventricular arrythmias
dynamic ECG changes
stable angina vs ACS
stable angina:
- during exertion, blood flow demand to heart increases, but narrowed coronary arteries cannot meet this increased demand leading to myocardial ischaemia and pain
ACS
- sudden plaque rupture and clot formation in the narrowed coronary arteries –> can cause partial or full occlusion
treatment for STEMI
- medical therapy: DAPT + anticoagulants
if <12 hrs since symptom start
- PCI
or
- fibrinolytic
if >12 hrs since symptom start
- assess for ongoing ischaemia
- PCI
or
- medical therapy
how to differentiate between NSTEMI and unstable angin
measure troponin
treatment for NSTEMI
- DAPT
- anticoagulants
+
- ongoing ischaemia –> PCI or CABG (multiple vessels / left main coronary artery affected)
- no ongoing ischameia –> medial therapy
what is never indicated for NSTEMI and unstable angina
fibrinolysis
unstable angina treatment
early risk stratification
- high risk –> DAPT + anticoagulant
+ PCI / CABG - low risk –> non invasive stress testing
what is fondaparineux
anticoagulant
what is tricagelor
antiplatelet
What are the signs and symptoms of ACS?
Signs: distress, anxiety, pallor, sweatiness, low grade fever, signs of heart failure (raised JVP, basal crepitations, 3rd heart sound)
Symptoms: acute central crushing chest pain lasting >20 minutes, nausea, sweating, dyspnoea, palpitations
What is a silent ACS and what patients does this occur in
ACS without the chest pain. May have syncope, pulmonary oedema, epigastric pain, bomiting, post op hypotension, oliguria, diabetic hyperglycaemia
Seen in the elderly and diabetics often
How are each of the three acute coronary syndromes diagnosed based on their investigation findings?
Triad of symptoms, ECG changes and hs-TnI levels
All will have cardiac sounding chest pain
STEMI:
ST elevation (>1mm in limb leads and 2mm in chest leads) or new LBBB
hs-TNI >100ng/L
CK often raised over 400
NSTEMI
ST depression, T-wave inversion or normal
hs-TnI>100ng/L
Unstable Angina
ST depression, T wave inversion or normal
hs-TnI is normal
what are type 2 myocardial infarctions
myocardial infarctions due to cardiac hypoperfusion for other reasons (e.g. severe sepsis, hypotension, hypovolaemia or coronary artery spasm)
what type of infarct causes a stemi vs nstemi
stemi - transmural infarct
nstemi - subendocardial infarct