Cardiology Conditions Flashcards
In which leads would you see an inferior MI?
II , III and aVF
In which leads would you see a septal MI?
V1 and V2
In which leads would you see a lateral MI?
V5, V6 and I
In which leads would you see a anterior MI?
V3 and V4, aVR and aVL
what are the tree stages of atherosclerosis?
Fatty streaks, Intermediate lesions, Fibrous plaque and rupture
What are RF for atherosclerosis?
age, smoking, high cholesterol, obesity, diabetes, HTN, family history
What happens in fatty streaks?
appear very early, aggregations of lipid laden macrophages and T-lymphocytes in intimal layer
What happens in intermediate lesions?
layers of foam cells, t lymphocytes and smooth muscle cells, platelets start to adhere to vessel wall
What happens in fibrous plaques?
Lesion is covered by dense fibrous cap that impedes flow and is prone to rupture
what is the Qrisk2?
Risk of developing CVD in the next 10 years
What is prinzmetal’s angina?
angina due to a coronary artery spasm
What is decubitus angina?
angina occurring when laying down
What is angina pectoralis?
chest pain or discomfort arising from the heart as a result of ischaemia
What is stable angina?
chest pain exacerbated when exercising
what are three criteria for typical angina?
central radiating chest pain, precipitated precipitated by exertion and relieved by rest of GTN spray
What does angina present with?
chest pain induced by effort and relieved by rest, dyspnoea, palpitations and syncope
what tests do you order for stable angina?
12 lead ECG (usually normal), CT angiography (shows narrowing), FBC and Cxr
How do you treat stable angina?
lifestyle changes, gtn spray and PCI or CABG
What is unstable angina?
crushing chest pain at rest
How do you test for unstable angina?
FBC, cardiac enzymes, ECG (ST depression) and CT angiogram
How do you treat unstable angina initially?
aspirin and fondaparinux
what is the mechanism of fondaparinux?
indirect inhibitor of factor Xa
If you established low risk for a MI what do you do?
no angiography, ticagrelor and aspirin or clopidogrel and aspirin (high bleeding risk)
if you established high risk what do you do?
angiography within 72 hours, prasugrel (if PCI) or ticagrelor or clopidogrel with aspirin
What are complications of unstable angina?
DARTH VADER: death, arrhythmia, renal failure, tamponade, HF, valve disease, aneurism, dressler’s syndrome, embolism and reoccurrence
What is dressler’s syndrome?
pericarditis following an MI (1-6 weeks)
What is the pathology of acute coronary syndromes?
rupture or plaque erosion with subsequent clot formation and vasoconstriction
What are the types of MI?
1: spontaneous due to primary coronary event
2: secondary due to increased demand or decreased supply of oxygen
What is a STEMI?
necrosis of cardiac tissue due to complete occlusion
What are RF for a STEMI?
age, male, CHD, HTN, hyperlipidaemia, family history
How does a STEMI present?
crushing central chest pain, sweating, SoB, fatigue, nausea, vomiting
occurs at rest, not relieved by GTN, longer than 20 min, 4th heart sound, pansystolic murmur
What tests do you order for a STEMI?
ECG (ST elevlation, tall T waves, LBBB, Q waves follow (evidence of previous infarction)), cardiac markers, CT angiography, FBC
How do you treat a STEMI initially?
MONA: morphine, oxygen (if under 94), nitrates, fondaparinux and aspirin
Within what time frame can you do reperfusion therapy?
12 hours
What do you give if you are performing a PCI?
pasugrel with aspirin
What do you do if you cannot deliver PCI within 120 minutes?
Fibrinolysis (IV alteplase) and aspirin with ticagrelor/clopidogrel
What is ticagrelor and clopidogrel?
Antiplatelet: P2Y12 receptor antagonist (ADP cannot bind and glycoprotein 2b/3a is not activated)
What is secondary prevention for STEMI?
ACEi: ramipril
BB: atenolol or bisoprolol
statin: atorvastatin
dual anti platelet therapy
What is a NSTEMI?
complete occlusion of a minor artery or partial of a major
How do you test for a NSTEMI?
ECG (St depression and T wave inversion), cardiac enzymes (troponin rise (3-12 hours) or fall)
How do you treat a NSTEMI?
initial aspirin and fondaparinux (antithrombin)
- Establish high or low risk with GRACE score (6 month mortality), troponin and ECG
- low risk: no angiography, ticagrelor and aspirin or clopidogrel and aspirin (high bleeding risk), assess LV function
- high risk: angiography within 72 hours, prasugrel (if PCI) or ticagrelor or clopidogrel with aspirin, assess LV function
What is the tetralogy of fallot?
ventricular septal defect, enlarged aorta, Left ventricle hypertrophy and pulmonary stenosis
What is a true aneurism?
dilations involve all layers of arterial wall
What is a false aneurism?
outer layer (adventitia) only
when do you speak of a AAA?
aortic diameter over 3 cm
What are some RF or aetiology of AAA?
Fhx, smoking, male, increasing age, HTN, COPD, trauma and atherosclerotic damage
How does an unruptured AAA present?
asymptomatic, pain in abdomen, vague pulsatile abdominal swelling
How does a ruptured AA present?
intermittent or continuous abdominal pain, pulsatile swelling, collapse, hypotension, tachycardia
How do you test for a AAA?
ultrasound, CT and MRI angiography
How do you treat a AAA?
below 5.5 cm: monitor
above: surgical repair
What is a thoracic abdominal aneurism?
if aorta reaches crucial diameter (6 or 7 cm) is looses distensibility and raise in BP can trigger dissection or rupture
What is aortic dissection?
medical emergency that begins with a tear in the intima. Blood then penetrates and flows between layers which forces lasers apart (false lumen) and results in dissection
How does aortic dissection present?
sudden onset of severe and central chest pain (mimics MI), pain is described as tearing, HTN, may develop neurological symptoms
How do you confirm a diagnosis of dissection?
transoesophageal echo
How do you treat aortic dissection?
IV metoprolol (BB) if hypertensive, analgesia, surgery to replace arch
What is a shock?
acute circulatory failure with inadequate perfusion resulting in hypoxia
How do you recognise shock?
pale, cold and sweaty skin
weak and rapid pulse
confusion, weakness, collapse and coma
What are different types of shock?
hypovolaemic, cariogenic (heart is not pumping), anaemic, cytotoxic, septic, anaphylactic
What is peripheral vascular disease?
Partial blockage of leg or peripheral vessels by an atherosclerotic plaque and/or thrombus resulting in insuffucient perfusion and ischaemia
What are RF for PVD?
smoking, diabetes, HTN, obesity, inactivity
How does PVD present?
claudication (pain) when exercising, ulcers that aren’t healing, colour changes (elevation pallor and dependent rubor)
can progress to rest pain when legs are elevated and relieved then leg is lowered
How to you test for PVD and what do you expect?
Bruit sound when asculation, doppler ultrasound, ankle brachial index below 0.9
How do you treat PVD?
Treat with lifestyle changes, revascularistaion for critical ischaemia
What is mitral stenosis?
Narrowing of mitral valve
What causes mitral stenosis?
rheumatic fever, annular calcification, congenital
How does mitral stenosis present?
Symptoms when area is less than 2cm: exertion dyspnoea, haemoptysis, palpitations, chest pains, malar flush, a fib
What heart sounds do you expect in mitral stenosis?
mid diastolic murmur with opening snap (expiration and lying on left side) and loud S1
What tests do you order for mitral stenosis?
CXR, ECG and echo (gs)
How do you treat mitral stenosis?
percutaneous mitral ballon valvotomy, replacement
What is mitral regurgitation?
Mitral valve doesn’t shut completely
What causes mitral regurgitation?
papillary muscle rupture or dysfunction, mitral valve prolapse, rheumatic heart disease, infective endocarditis
What are RF for mitral regurgitation?
low BMI, females, age, previous MI