If clinical finding not present, go onto next
question a  |
|
|
LR
(95% CI) |
probability of MI
(95% CI) |
| ST elevation or Q waves in 2 or more
leads, not known to be old |
|
|
22
(17 to 27) |
75%
(70% to 79%) |
| |
|
|
. |
. |
| chest pain began 48 hours ago or more |
=> |
ST-T changes of ischaemia or strain, not
known to be old |
2.0
(1.5 to 2.9) |
22%
(15% to 28%) |
| |
|
no changes or old |
0.12
(0.076 to 0.19) |
1.6%
(0.9% to 2.4%) |
| |
|
|
|
|
| previous history of angina or MI |
=> |
ST- T changes of ischaemia or strain, not
known to be old |
2.6
(2.0 to 3.2) |
26%
(21% to 31%) |
| |
|
longest pain episode < 1 hour |
0.30
(0.18 to 0.49) |
4.0%
(2.1% to 5.9%) |
| |
|
pain worse than prior angina or the same
as a prior MI |
0.92
(0.65 to 1.3) |
11%
(7.6% to 15%) |
| . |
|
pain not as bad |
0.076
(0.019 to 0.31) |
1.0%
(0.0% to 2.5%) |
| |
|
|
|
|
| pain radiates to neck, left shoulder or
left arm |
=> |
aged < 40 |
0.18
(0.058 to 0.57) |
2.4%
(0.0% to 5.1%) |
| . |
|
chest pain reproduced by palpation |
0.093
(0.013 to 0.67) |
1.3%
(0.0% to 3.7%) |
| |
|
pain radiates to back, abdomen or legs |
0.60
(0.25 to 1.5) |
7.7%
(1.2% to 14%) |
| . |
|
chest pain stabbing |
0.13
(0.018 to 0.94) |
1.8%
(0.0% to 5.2%) |
| |
|
chest pain not stabbing |
1.5
(1.1 to 2.0) |
17%
(13 to 22%) |
| - |
|
|
|
|
| ST- T changes of ischaemia or strain, not
known to be old |
|
|
2.3
(1.7 to 3.3) |
26%
(19% to 33%) |
| |
|
|
|
|
| no changes or old |
|
|
0.15
(0.099 to 0.22) |
2.0%
(1.2% to 2.8%) |
internal medicine 