Myocardial Infarction
- M.I. is define as Damage or Death of myocardial muscle due to Abrupt blood flow to the Heart.
- the blockage may be cause by formation of thrombus in coronary artery ,sudden progression of atherosclerosis,prolong narrowing of arteries.
Etiology:
- atherosclerosis
- arteries
- prolong narrowing
- thrombus
- agnoist
Risk factor:
- genetic cardial disorder
- smoking
- alcohol consumption
- diet - like high cholesterol, high fat
- activity - low physical exercise
Pathophysiology:
- due to etiological factor
- myocardial ischemia
- decrease myocardial oxygen supply
- increase cellular hypoxia
- decrease myocardial contractility
- decrease arterial pressure
- stimulation of baro-receptor and chemo-receptor
- sympathetic response
- increase myocardial contractility
- increase heart rate
- increase myocardial oxygen demand
- further myocardial ischemia
- necrosis of myocardial cells
- myocardial infarction or Heart Attack
Clinical manifestation:
- sever chest pain(more then angina pectoris )
- pain may radiant to the chest, shoulder, neck , jaw , back
- nausea
- unexplained anxiety
- dizziness
- dysponea
- sweating
Diagnostic Evaluation:
- ECG (elevated S & T segment)
- laboratory test : serum createnin kinase, myoglobin, cardiac troponin, ESR, (all level is increased)
Management:
Early management :
- morphine sulfate
- Anti-hematic : Domperidon, Alizapride
- Acute deperfusion therapy
- Primary percutaneous coronary intervention
- Maintaining vessel potassium
- Adjuncentive therapy
late management :
- life style modification : Diet control, stop smoking, regular exercise
- Secondary prevention : Anti-platelets , beta-blocker
Nursing management :
The probable nursing diagnosis will be :
- pain related to an imbalance in oxygen supply and demand.
- Anxiety related to chest pain, fear of death, threatening environment.
- Decrease cardiac output related to impaired contractility.
- Activity intolerance related to insufficient oxygenation to perform ADL and deconditioning effect of bed-rest.
- Risk for injury related to dissolution of protective clot.



