Pathology - Myocardial infarction with non-ST segment elevation (NSTEMI)

Pathology - Myocardial infarction with non-ST segment elevation (NSTEMI) 
Pathophysiology 
This is an Acute Coronary Syndrome (ACS) episode; NSTEMI or unstable angina are the most likely causes. Both NSTEMI and STMI, as well as unstable angina, fall within this category of conditions. Biochemical indicators and the presence or absence of ECG abnormalities are used to differentiate the illnesses. Substernal chest pain, heaviness, or pressure that may spread to the patient's left arm or left jaw region is the classic presentation of acute coronary syndrome (ACS). Though the illness usually progresses over time and may eventually lead to symptoms at rest, the discomfort is most frequently triggered by effort and relieved by rest. This patient's pulse and blood pressure have increased due to SNS activation and discomfort. Relatively low blood pressure in this context would be concerning as it would probably imply substantial ischemia left ventricular injury.

​Another sign of the SNS's reaction to damage and pain is diaphoresis. This patient does not now exhibit any symptoms of ventricular ischemia, as evidenced by normal perfusion to the limbs, no abnormalities in the ECG, and no S3 or S4 heart sounds. Acute and without decompensation at this point, the patient shows no signs of heart failure (normal JVP and clean lung fields). Apart from the treatment with oxygen, nitrate, aspirin, and morphine, this patient requires additional assessment and constant observation to ensure that there is no progression to NSTEMI or STEMI. It is also recommended to evaluate biochemical markers, such as cardiac troponin and creatine kinase MB.