STEMI + NSTEMI Flashcards
Acute Coronary Syndrome
Irreversible Myocardial Necrosis or cell death
reduced perfusion to cardiac cells that damage cardiac tissue
Angina
Stable - with exertion
Unstable - occurs at rest
Variant - spasms
Nitro SL . 5 min no relief call 911.
EKG
- ST segment depression
- occurs within first feew hours
- returns normal within months
Zone of Ischemia
Cells that may be viable if blood flow can be
restored
EKG
ST segment depression
* Depressed ST segment drags down the T waves
* Seen in the area of reduced blood flow in endocardium
* Occurs within the first few hours
* Returns to normal within several months
Zone of Injury
Results from decreased blood flow
Cells do not completely repolarize
ST elevation
*ST segment elevation
* Blood flow is interrupted by potentially viable
tissue remains
* Occurs directly over the leads of the affected
area
* Occurs within minutes and can persist for
several days
* Intervention is needed to unblock the occlusion
* ST segment normalizes within days to weeks
Zone of Infarction
Area of cellular death and necrosis of the myocardium
Necrotic cells do not depolarize
Leads to Q wave
Q waves suggest
Irreversible cell death
S/S of MI
Prolonged severe chest pain
N/V
Diaphoresis
SOB
Atypical chest pain
- fatigue, anxiety, restlessness, impending doom, back pain
Anterior Wall MI
Artery Involved - Left Anterior Descending ARtery
Leads - V1-V4 ST elevation Q waves
Inferior Wall MI
Artery Involved - Right Coronary Artery, Left Circumflex
Leads - 2, 3 St elevation, Q wave
Lateral Wall MI
Artery Involved - Left Anterior Descending Artery
Left circumflex artery
Posterior Wall MI
Right Coronary Artery
Left Circumflex
Septal Wall
LAD
Complications of MI
Dysrhythmias**
*Re-infarction
*Pump Failure
* Ventricular aneurysm
* Ventricular Septal Defect
* Papillary muscle rupture
* Pericarditis
Treatment of MI
Oxygen
Pain Relief
Nitroglycerin
Aspirin
POST MI
BB
ACE
