Institute specific interventions that are necessary early in the evaluation and treatment of AMI and unstable angina.

Replace this sample text paragraph with actual text from the clinical practice guideline annotation. No matter how patients enter the guideline, a logical and timely evaluation for IHD is required, especially for an acute or unstable coronary syndrome, which can be fatal.

1. Cardiac monitor: Patients with acute coronary syndromes (ACS), especially with suspected MI, should be placed on continuous cardiac monitoring as soon as possible. Potentially lethal ventricular arrhythmias can occur within seconds to hours from the onset of coronary ischemia, and monitoring will allow their immediate detection and treatment.



2. Oxygen (O₂): Supplemental oxygen should be administered on initial presentation, especially if CHF or oxygen desaturation is present. For uncomplicated MIs, oxygen may be reassessed after six hours. CO₂ retention is not usually a concern with low flow nasal O₂, even in patients with severe chronic obstructive pulmonary disease (COPD).



3. Aspirin: 160 mg to 325 mg should be chewed immediately to accelerate absorption and should be given even if the patient is on chronic aspirin therapy.



4. Intravenous (IV) Access: Intravenous access for the delivery of fluids and drugs should be obtained, with both antecubital veins used if possible for multiple infusions, especially if thrombolytic therapy is being considered. Unnecessary arterial and venous punctures should be avoided and experienced personnel should perform access. While the IV is being started, blood samples for cardiac enzymes/markers (i.e., CK, CK-MB, and troponin), lipid profile, complete blood count (CBC), electrolytes, renal function, international normalized ratio (INR), and activated partial thromboplastin time (APTT) can be obtained, although immediate treatment of ACS should not be delayed by the results from these tests.



5. Sublingual nitroglycerin: should be given, unless the patient is hypotensive or bradycardic, has taken sildenafil within the last 24 hours, or there is a strong suspicion of right ventricular infarction.



6. ECG: Obtain within 10 minutes of presentation and follow-up with a serial ECG. A right-sided ECG should be performed if a standard ECG suggests an inferior wall MI.



7. Adequate analgesia



8. Advanced cardiac life support (ACLS, 1999): algorithm should be applied, as indicated.



9. Chest X-ray: A portable chest radiograph should be performed, particularly to evaluate for mediastinal widening (aortic dissection), cardiac silhouette, and evidence of CHF.



10. Transportation: In many settings within the DoD or the VA systems, the patient will need to be urgently transported to a setting where an adequate level of monitoring, evaluation, and treatment is available.