Imaging of Circulatory Disturbances Flashcards Preview

Cardiovascular System > Imaging of Circulatory Disturbances > Flashcards

Flashcards in Imaging of Circulatory Disturbances Deck (16)
Loading flashcards...
1
Q

What are the 3 vascular imaging techniques?

A

Radionuclide imaging
MRI functional imaging
Ultrasound

2
Q

What are the ideal properties of a man-made contrast agent?

A
Differential X Ray attenuation
Inert
Stable in selected body compartments
Painless
Easy to use
Cheap
3
Q

What are problems with Iodinated Contrast?

A
Major reactions 
Renal dysfunction 
Disturbance of thyroid metabolism 
Disturbance of clotting 
Seizures 
Pulmonary oedema
4
Q

What are the side effects of parenteral iodinated contrasts?

A

Metallic taste
Feeling of warmth
Arterial injections: micturition and discomfort
Rarely nausea

5
Q

What are the contrindiations for parenteral iodinated contrast?

A

Previous contrast allergy
Asthma/atopy
Poor renal function
Metformin (a DM drug which can cause renal impairment)

6
Q

Name some pocedures an interventional radiologist can carry out?

A
Angiography 
Embolisation 
Catheter thrombolysis 
Drainage of abscesses
Nephrostomy 
Vertebroplasty
7
Q

When in angioplasty (then stent) indicated?

A

Short stenoses or occlusions

Sessile/concentric plaques

8
Q

Name a negative contrast agent

A

Carbon dioxide

9
Q

When are negative contrast agents useful?

A

In patients with poor renal function or sensitivity to iodinated contrast agents

10
Q

What are possible complications with angioplasty?

A
Occlusion 
Dissection 
Embolisation
Rupture 
Infection
11
Q

What are the pros and cons of using ultrasound?

A

No radiation
Quick
Non-invasive

But
Resolution vs penetration
May be more physiological
Operator dependant

12
Q

What is radionuclide imaging used to investigate?

A

Perfusion

Blood loss

13
Q

What are the pros and cons of CT angiogram?

A

Gives info about other structures
Sensitive
IV injection only

BUT
Radiation
High contrast dose
Expensive

14
Q

Is CT or MRI more expensive?

A

CT

15
Q

Is an MRI scan safe for someone with a pacemaker?

A

No, it involve high magnetic fields

16
Q

What are the pros and cons for MRI?

A

Sensitive and specific
No radiation
No nephrotic contrast

BUT
Very expensive
High contrast cost