Posterior Infarction:
Posterior Infarction:
-When accompanied by inferior or lateral STEMI, posterior infarction is easily recognized, but it can be difficult to diagnose when it occurs alone, the so-called true posterior STEMI.
-ST-segment depression that is most prominent in any of the leads V1 through V3 often indicates posterior STEMI rather than non–ST-elevation ACS and indicates the need for emergency reperfusion.
-On the other hand, ST-segment depression that is greatest in leads other than V1-V3 is more indicative of diffuse subendocardial ischemia (non-ST-elevation ACS).
-If a patient has persistent true angina and ST-segment depression in leads V1-V3, record leads V7-V9 to confirm the dg and perform emergent reperfusion (thrombolysis or PCI). V7-V9 will have ST-segment elevation and possibly Q waves.
Also, if a patient has persistent angina and a non-diagnostic ECG, record leads V7-V9. ST-segment elevation in those leads may be the only ECG indicator of ischemia (usually LCx ischemia).
-Large and/or wide R wave in leads V1 or V2 supports the dg of posterior infarction but is only seen in ~50% of the cases. Large R is reciprocal to posterior Q in this context.
Causes of large R wave in V1 or V2:
Diagnosis Confirmatory clues
|RVH |Right axis deviation |
| |Right atrial enlargement |
| |ST depression and T inversion in V1-V2 |
|RBBB |QRS wide> 120 msec (>100 msec if incomplete RBBB) |
|Posterior MI |ST depression in V1-V3 but T upright (≠RVH) |
| |ST elevation and/or Q waves in V7-V9 |
|WPW |Short PR, delta wave, widened QRS |
|Normal variant |Large R wave in V1-V2 is the only abnormality on ECG |
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- left ventricular posterior wall thickness
- posterior wall thickness on echo
- posterior chamber intraocular lens icd 10
- right posterior corona radiata
- inferior posterior stemi icd 10
- lumbar posterior facet syndrome icd 10
- posterior tibial artery disease
- posterior tibial artery occlusion symptoms
- posterior tibial artery stenosis
- posterior tibial artery occlusion treatment
- lv posterior wall thickness
- posterior temporal lobe infarct icd 10