Session 10 - Ischaemic Heart Disease and Chest Pain (1) Flashcards Preview

Semester 2 - CVS > Session 10 - Ischaemic Heart Disease and Chest Pain (1) > Flashcards

Flashcards in Session 10 - Ischaemic Heart Disease and Chest Pain (1) Deck (42):
1

Name three organs/systems other CVS which can cause chest pain

Lungs and pleura
GI system
Chest wall

2

What can be used to distinguish between different types of pain?

Character and type of pain, other special symptoms.

3

What conditions of lungs and pleura cause chest pain? (3)

Pneumonia
Pulmonary Embolism
Pneumothorax

4

What conditions of the GI system cause chest pain?

Oesophagus – Reflux
Peptic ulcer disease
Gall Bladder – Biliary colic, cholecystitis

5

What conditions of the chest wall cause chest pain?

Ribs – fractures, bone metastases
Muscles
Skin (herpes zoster)
Costo-chondral joints

6

What conditions of the CVS cause chest pain?

Myocardium – Angina, MI
Pericardium – Pericarditis
Aorta – Aortic dissection

7

What are the two types of risk factors for coronary atheroma?

Modifiable
Non-modifiable

8

Give three non-modifiable risk factors for coronary artheroma

Increasing Age
Male gender (females catch up after menopause)
Family history

9

Give seven modifiable risk factors for coronary atheroma

Hyperlipidaemia
Smoking
Hypertension
Diabetes mellitus – Doubles IHD risk
Exercise
Obesity
Stress

10

What are the four main risk factors for coronary artheroma?

Hyperlipidaemia
Smoking
Hypertension
Diabetes mellitus (doubles IHD)

11

What type of pain can IHD cause?

Central, retrosternal or left sided

12

Describe the course of the pain from IHD

Pain my radiate to shoulder and arms, with left side more common that the right
- May radiate along the neck, jaw, epigastrium and back.

13

Describe the character of the pain from IHD

Crushing, occasionally described as burning epigastric pain (inferior MI)

14

How does pain from IHD vary?

In intensity, duration, onset and precipitation.
Aggravating and relieving factors and associated symptoms

15

How does pain from IHD get worse?

Stable angina --> Unstable angina --> MI

16

Describe the structure of atheromas in stable angina

Atheromatous plaques with a necrotic centre and fibrous cap

17

What is the effect of atheroma in IHD?

Occlude more and more of the lumen as they build up in coronary vessels. This leaves less space for passage of blood and ischaemia in myocardium

18

What area is most at risk of ischaemia?

Subendocardial surface, myocardial wall pressure greatest

19

How does coronary arteries increase O2 uptake?

Increase flow, via vasodilator metabolites (adenosine, K+, H+)
Collateral circulation

O2 uptake already maximum!

20

What increases myocardial demand?

Heart rate
Wall tension - preload, afterload
Contractility

21

What does myocardial O2 supply depend on?

Coronary blood flow
- perfusion pressure
- coronary artery resistance

O2 carrying capacity

22

What is the usual presentation of a STEMI?

- Chest pain not relieved by GTN
- N&V
- May be painless +/- atypical
- Acute pulmonary oedema, SOB, syncope, cardiogenic shock

23

What are four ECG findings you will see in STEMI?

- ST elevation (see above)
- New LBBB
- +/- T wave inersion
- Pathological Q waves

24

Give 4 steps in initial management of STEMI

- Airway, Breathing, Circulation
- IV access
- 12-lead ECG
- MONA

25

What is MONA?

o Morphine (2.5 – 10mg + antiemetic)
o Oxygen
o Nitrates (GTN spray 2 puffs sublingually)
o Aspirin (300mg chewed)

26

What are three investigations you should do in STEMI?

- Bloods
o FBC, U&E, LFTs, glucose, lipids, CK, Troponin I
- Portable CXR
- ECG

27

What are two main treatments in STEMI?

Thrombolysis or PCI

28

When is PCI used?

 PCI is the gold standard for acute coronary syndrome and should only be used if primary PCI programme available within 120 minutes of first medical contact
 Indications are the same as thrombolysis

29

What are the ECG changes which indicate thrombolysis or PCI?

• ST elevation >1mm in 2+consecutive leads
• ST elevation >2mm in 2+consecutive leads
• New onset LBBB

30

Give four contraindication for thrombolysis

• Haemorrhagic sroke or ischaemic stroke

31

What do you give along with PCI or thrombolysis?

B blocker
ACE inhibitor
Clopidogrel

32

What complications can you develop as a result of a STEMI?

SPREAD
S – Sudden Death
P – Pump failure/pericarditis
R – Rupture papillary muscle or septum
E – Embolism
A – Aneurysm/arrhytmias
D – Dresslers syndrome ( pleuritic chest pain, pericarditis and low grade fever which develops post-MI and is thought to be immune mediated.

33

What do you prescribe on discharge post-MI

Aspirin, clopidogrel, ACE inhibitor, B blocker, Statin, Risk factor modification, 1 month off work.

34

What are the two main ECG changes in an NSTEMI?

1) T wave inversion
2) ST depression

35

How do you differentiate between STEMI and NSTEMI?

NSTEMI will have a positive troponin I and unstable angina will be negative.

36

What are the management steps for an NSTEMI/

1) Analgesia
a. Morphine
2) Anti-ischaemic
a. Nitrates
b. ACE inhibitor
c. B blockers
d. Calcium channel antagonists
e. Statins
3) Anti-platelets
a. Aspirin
b. Clopidogrel
4) Anti-thrombotic
a. LMWH

37

When is PCI considered in an NSTEMI?

PCI can be considered if Troponin is persistently raised, the angina persists despite best medical therapy or there are features of
- Heart failure
- Poor LV function
- Haemodynamic instability
- PCI

38

What is the SA Node suppliedby?

RCA

39

What is the AV node supplied by?

RCA

40

What is the bundle of HIS supplied by?

LAD

41

WHAT is the RBBB supplied by?

Proximal portion by LAD
Distal Portion by RCA

42

What is the LBBB suppied by?

LAD
LAD and PDA