Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, is the interruption of blood supply to part of the heart, causing some heart cells to die.
CLASSIFICATION:
(1) transmural MI- IS associated with atherosclerosis involving major coronary artery. It can be subclassified into anterior,posterior or inferior.
(2) subendocardial MI- involves small area, in the subendocardial wall of the left ventricle,ventricular septum,papillary muscles.
SIGNS & SYMPTOMS:
- Chest pain.
- Dyspnea.
DIANOSIS:
1.Clinical history of ischaemic type chest pain lasting for more than 20 minutes
2.Changes in serial ECG tracings: at least 1 mm (0.1 mV) of ST segment elevation in the limb leads, and at least 2 mm elevation in the precordial leads & Q waves.
3.Rise and fall of serum cardiac biomarkers such as creatine kinase-MB fraction and troponin
TREATMENT:
- Nitrates.
- O2.
- Morphine.
- Beta blockers.
- ASA.
- Heparin.
Etiologies of dilated cardiomyopathy (25/12/2010) Heart Failure (25/12/2010) Systolic dysfunction (25/12/2010) Myocarditis (21/12/2010) Ischemic cardiomyopathy (21/12/2010) Echocardiography in CHF (21/12/2010) Cardiac marker (21/12/2010) Tachyarrhythmias (21/12/2010) Calcium channel blocker (21/12/2010) Why don’t Veins develop atheromata? (21/12/2010)
