The diagnosis is secured when there is a rise and/or fall of troponin (high sensitivity assays are preferred) along with supportive evidence in the form of typical symptoms, suggestive electrocardiographic (ECG) changes, or imaging evidence of new loss of viable myocardium or new regional wall motion abnormality.
Then, can you have an MI without ECG changes?
NSTEMI is diagnosed in patients determined to have symptoms consistent with ACS and troponin elevation but without ECG changes consistent with STEMI. Unstable angina and NSTEMI differ primarily in the presence or absence of detectable troponin leak.
Hereof, is acute MI serious?
Acute myocardial infarction, or heart attack, is a serious condition that occurs when blood flow to the heart is cut off, which requires immediate medical treatment. Fortunately, there are many ways to prevent complications associated with this condition and minimize the long-term effects on health.
Is the ECG always abnormal in patients with acute MI?
Myocardial infarction with an initial normal ECG is uncommon and may result from involvement of any of the three coronary arteries. Electrocardiographic evolution usually occurs within the first 48 h of hospitalization.
ST segment elevation myocardial infarction (STEMI) non-ST segment elevation myocardial infarction (NSTEMI) coronary spasm, or unstable angina.
The heart releases troponin into the blood following an injury, such as a heart attack. Very high troponin levels usually mean that a person has recently had a heart attack. The medical term for this attack is myocardial infarction.
The J point of the ECG is at the end of the QRS complex and the beginning of the ST segment. J point elevation can be seen in early repolarization. At times, J point elevation can be ischemic, however, this is somewhat rare.
The treatment of MI includes, aspirin tablets, and to dissolve arterial blockage injection of thrombolytic or clot dissolving drugs such as tissue plasminogen activator, streptokinase or urokinase in blood within 3 h of the onset of a heart attack.
The main risk factors for MI include genetic susceptibility and non-genetic factors such as hypertension, obesity, diabetes and lifestyle (5–10). Many studies have shown that smoking is not only a risk factor for the onset of MI but also a predictor of a poor prognosis for MI (7, 11, 12).