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FIRE: Focused Initial Rapid Evaluation

A Focused Initial Rapid Evaluation (FIRE) should be performed to identify patients in need of immediate intervention.

Boxes in the red color signify that an urgent management is needed.

Identify cardinal findings of unstable angina/ NSTEMI : ❑ Chest pain or chest discomfort ❑ Sudden onset ❑ Sensation of heaviness, tightness, pressure, or squeezing ❑ Duration> 20 minutes (but usually less than half an hour) ❑ Radiation to the left arm, jaw, neck, right arm, back or epigastrium ❑ No relief with medications ❑ No relief with rest ❑ Worse with time ❑ Worse with exertion ❑ Associated symptoms of palpitations, nausea, vomiting, sweating, dyspnea, and lightheadedness ❑ Characteristic ECG changes consistent with unstable angina/ NSTEMI ❑ No changes ❑ Non specific ST / T wave changes ❑ Flipped or inverted T waves ❑ ST depression (carries the poorest prognosis) ❑ Increase in >99th percentile of upper limit of normal of troponin and / or CK MB , which is consistent with NSTEMI

Rule out life threatening alternative diagnoses: ❑ Aortic dissection (suggestive findings: back pain, interscapular pain, aortic regurgitation, pulsus paradoxus, blood pressure discrepancy between the arms) ❑ Pulmonary embolism (suggestive findings: acute onset of dyspnea, tachypnea, hemoptysis, previous DVT) ❑ Cardiac tamponade (suggestive findings: hypotension, jugular venous distention, muffled heart sounds, pulsus paradoxus) ❑ Tension pneumothorax (suggestive findings: sudden dyspnea, tachycardia, chest trauma, unilateral absence of breath sound) ❑ Esophageal rupture (suggestive findings: vomiting, subcutaneous emphysema)

Begin initial treatment: ❑ Administer aspirin (I-A) ❑ 162 to 325 mg of non enteric aspirin,orally, crushed or chewed, THEN ❑ 75 to 325 mg/day Among patients with either GI intolerance or hypersensitivity against it, administer a loading dose followed by maintenance dose of either clopidogrel (I-B), or prasugrel in PCI patients (I-C), or ticagrelor (I-C) ❑ Administer 2-4 L/min oxygen via nasal cannula when saturation <90% ❑ Caution in COPD patients: maintain an oxygen saturation between 88% and 92% ❑ Administer beta-blockers (unless contraindicated) and titrate to the heart rate and blood pressure Contraindicated in heart failure , prolonged or high degree AV block , reactive airway disease , high risk of cardiogenic shock and low cardiac output state ❑ Metoprolol IV, 5 mg every 5 min, up to 3 doses, then 25 to 50 mg orally every 6 hours ❑ Carvedilol IV, 25 mg, two times a day ❑ Administer sublingual nitroglycerin 0.4 mg every 5 minutes for a total of 3 doses Contraindicated in suspected right ventricular MI , recent use of phosphodiesterase inhibitors , decreased blood pressure 30 mmHg below baseline ❑ Administer IV morphine if persistent symptoms or pulmonary edema ❑ Initial dose 4-8 mg ❑ 2-8 mg every 5 to 15 minutes, as needed ❑ Administer 80 mg atorvastatin ❑ Monitor with a 12-lead ECG all the time

Does the patient have any of the following indications that require immediate angiography and revascularization ? ❑ Hemodynamic instability or cardiogenic shock ❑ Severe left ventricular dysfunction or heart failure ❑ Recurrent or persistent rest angina despite intensive medical therapy ❑ New or worsening mitral regurgitation or new VSD ❑ Sustained VT or VF ❑ Prior PCI within past 6 months or CABG

YES

NO

Does the patient have negative ECG findings AND negative biomarkers?

Yes

No

Repeat ECG and biomarkers within next 6 hours and 12 hours

ECG and biomarkers are both negative

At least one (ECG or biomarkers) is positive

Proceed to complete diagnostic approach of chest pain to rule out differential diagnoses

Calculate the risk of future adverse clinical outcomes: ❑ Thrombolysis in Myocardial Infarction (TIMI) risk score, OR ❑ GRACE score

Proceed to angiography

Intermediate or high risk Initial invasive strategy

Low risk Initial conservative strategy

Administer ONE of the following antiplatelet agents (before or at the time of PCI): ❑ P2Y12 receptor inhibitors ❑ Clopidogrel 600 mg ❑ Ticagrelor 180 mg ❑ Prasugrel 60 mg Prasugrel is contraindicated in case of prior history of strokes or TIAs, active pathological bleeding, age ≥75 years, when urgent coronary artery bypass graft surgery (CABG) is likely, body weight <60 kg, propensity to bleed, concomitant use of medications that increase the risk of bleeding ❑ IV GP IIb/IIIa inhibitors ❑ Abciximab ❑ Loading dose 0.25 mg/kg IV bolus ❑ Maintenance dose 0.125 mg/kg/min ❑ Eptifibatide ❑ Loading dose 180 mcg/kg IV bolus ❑ Another 180 mcg/kg IV bolus after 10 minutes ❑ Maintenance dose 2 mcg/kg/min ❑ Decrease infusion by 50% if creatinine clearance <50 mL/min ❑ Avoid in hemodialysis patients ❑ Tirofiban ❑ Loading dose 25 mcg/kg ❑ Maintenance dose 0.15 mcg/kg/min ❑ Decrease infusion by 50% if creatinine clearance <30 mL/min Administer ONE of the following anticoagulant therapy: ❑ Unfractionated heparin ♦ If GP IIb/IIIa receptor antagonist is planned ❑ 50- to 70-U/kg IV bolus ♦ If no GP IIb/IIIa receptor antagonist is planned ❑ 70- to 100-U/kg bolus ❑ Bivalirudin ❑ 0.75-mg/kg IV bolus, then 1.75–mg/kg/h infusion ❑ Additional bolus of 0.3 mg/kg if needed ❑ Decrease infusion to 1 mg/kg/h when creatinine clearance <30 mL/min

Administer ONE of the following antiplatelet agents either before OR during the time of PCI: Before PCI ❑ P2Y12 receptor inhibitors ❑ Clopidogrel (600 mg) (I-B), OR ❑ Ticagrelor (180 mg) (I-B) OR ❑ IV GP IIb/IIIa inhibitors (I-A) ❑ Eptifibatide ❑ Loading dose 180 mcg/kg IV bolus followed by another bolus after 10 minutes ❑ Maintenance dose 2 mcg/kg/min, OR ❑ Tirofiban ❑ Loading dose 25 mcg/kg ❑ Maintenance dose 0.15 mcg/kg/min OR At the time of PCI ❑ P2Y12 receptor inhibitors ❑ Clopidogrel (600 mg) (I-A), OR ❑ Ticagrelor (180 mg) (I-B), OR ❑ Prasugrel (60 mg) (I-B) OR ❑ IV GP IIb/IIIa inhibitors (I-A) ❑ Eptifibatide ❑ Loading dose 180 mcg/kg IV bolus followed by another bolus after 10 minutes ❑ Maintenance dose 2 mcg/kg/min, OR ❑ Tirofiban ❑ Loading dose 25 mcg/kg ❑ Maintenance dose 0.15 mcg/kg/min

Administer ONE of the following antiplatelet agents: ❑ Clopidogrel (I-B) ❑ Loading dose (300 mg) ❑ Maintenance dose for up to 12 months (75 mg) ❑ Ticagrelor (I-B) ❑ Loading dose (180 mg) ❑ Maintenance dose for up to 12 months (90 mg twice daily)

Consider urgent CABG if the coronary anatomy is not amenable to PCI and one of the following: ❑ Patients with left main or left main equivalent disease ❑ Patients with three or two vessel disease involving the left anterior descending artery with left ventricular dysfunction ❑ Diabetic patients

❑ Perform an angiography

Continue with the complete diagnostic approach below