Ischaemia

Question 1

An ECG excludes coronary artery disease

Answer 1

NO even if widespread

Question 2

What leads detect lateral vascular territory

Answer 2

I, avL, v5, v6

Question 3

What leads detect anterior vascular territory

Answer 3

v1, v2, v3, v4

Question 4

What leads detect inferior vascular territory

Answer 4

II, III, avF

Question 5

describe the changes to T wave

Answer 5

tall and tented, flattened, biphasic, inverted

Question 6

what is the main prognostic change to ecg

Answer 6

ST depression

Question 7

What is the strict criteria for thrombolysis

Answer 7

ST elevation, >1mm in two contigious limb leads, >2mm in two contigious chest leads, posterior MI, left BBB

Question 8

When do Q waves develop

Answer 8

between 2 to 24 hours

Question 9

What do Q waves suggest

Answer 9

myocardial necrosis and loss of viable myocardium but don’t always mean complete infarct or blocked artery

Question 10

what is are the criteria for pathological Q wave

Answer 10

any Q wave in leads v1-3
Q wave >= to 0.03s in leads I, II, aVL, avF, 4, (5?), 6
must be present to two contigious leads and greater than 1mm depth

Question 11

Whats the benefit of capturing ST elevation early

Answer 11

improves prognosis

Question 12

Other causes of ST elevation

Answer 12

benign early repolarisation, left BBB, left ventricular hypertrophy, ventricular aneurysm, coronary vasospasm, pericarditis, brugada syndrome, subarachnoid haemorrhage

Question 13

where do changes occur in posterior MI

Answer 13

ST depression in leads v1-3