Unstable angina / non ST elevation myocardial infarction initial therapy

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Non-ST Elevation Myocardial Infarction

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Varun Kumar M.B.B.S; Lakshmi Gopalakrishnan M.B.B.S.

ACC / AHA Guidelines for Initial Therapy (DO NOT EDIT) [1][2]

Class I

1. The history, physical examination, 12 lead ECG, and initial cardiac biomarker tests should be integrated to assign patients with chest pain into 1 of 4 categories: a non cardiac diagnosis, chronic stable angina, possible ACS, and definite ACS. (Level of Evidence: C)

2. Patients with probable or possible ACS but whose initial 12 lead ECG and cardiac biomarker levels are normal should be observed in a facility with cardiac monitoring (e.g., chest pain unit or hospital telemetry ward), and repeat ECG (or continuous 12-lead ECG monitoring) and repeat cardiac biomarker measurement(s) should be obtained at predetermined, specified time intervals. (Level of Evidence: B)

3. In patients with suspected ACS in whom ischemic heart disease is present or suspected, if the follow-up 12 lead ECG and cardiac biomarkers measurements are normal, a stress test (exercise or pharmacological) to provoke ischemia should be performed in the ED, in a chest pain unit, or on an outpatient basis in a timely fashion (within 72 h) as an alternative to inpatient admission. Low-risk patients with a negative diagnostic test can be managed as outpatients. (Level of Evidence: C)

4. In low-risk patients who are referred for outpatient stress testing, precautionary appropriate pharmacotherapy (e.g., ASA, sublingual NTG, and/or beta blockers) should be given while awaiting results of the stress test. (Level of Evidence: C)

5. Patients with definite ACS and ongoing ischemic symptoms, positive cardiac biomarkers, new ST-segment deviations, new deep T-wave inversions, hemodynamic abnormalities, or a positive stress test should be admitted to the hospital for further management. Admission to the critical care unit is recommended for those with active, ongoing ischemia/injury or hemodynamic or electrical instability. Otherwise, a telemetry step-down unit is reasonable. (Level of Evidence: C)

6. Patients with possible ACS and negative cardiac biomarkers who are unable to exercise or who have an abnormal resting ECG should undergo a pharmacological stress test. (Level of Evidence: B)

7. Patients with definite ACS and ST-segment elevation in leads V7 to V9 due to left circumflex artery occlusion should be evaluated for immediate reperfusion therapy. (Level of Evidence: A)

8. Patients discharged from the ED or chest pain unit should be given specific instructions for activity, medications, additional testing, and follow-up with a personal physician. (Level of Evidence: C)

Class IIa

1. In patients with suspected ACS with a low or intermediate probability of CAD, in whom the follow up 12 lead ECG and cardiac biomarkers measurements are normal, performance of a non invasive coronary imaging test (i.e., Cardiac / Coronary CT Angiography) is reasonable as an alternative to stress testing. (Level of Evidence: B)

See Also

Sources

  • 2011 ACCF/AHA Focused Update Incorporated Into the ACC/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non-ST-Elevation Myocardial Infarction: A Report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines[1]
  • The ACC/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non-ST-Elevation Myocardial Infarction [2]

References

  1. 1.0 1.1 Anderson JL, Adams CD, Antman EM, Bridges CR, Califf RM, Casey DE, Chavey WE, Fesmire FM, Hochman JS, Levin TN, Lincoff AM, Peterson ED, Theroux P, Wenger NK, Wright RS (2011). "2011 ACCF/AHA Focused Update Incorporated Into the ACC/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non-ST-Elevation Myocardial Infarction: A Report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines". Circulation. doi:10.1161/CIR.0b013e318212bb8b. PMID 21444888. Retrieved 2011-04-08. Unknown parameter |month= ignored (help)
  2. 2.0 2.1 Anderson JL, Adams CD, Antman EM; et al. (2007). "ACC/AHA 2007 guidelines for the management of patients with unstable angina/non-ST-Elevation myocardial infarction: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines for the Management of Patients With Unstable Angina/Non-ST-Elevation Myocardial Infarction) developed in collaboration with the American College of Emergency Physicians, the Society for Cardiovascular Angiography and Interventions, and the Society of Thoracic Surgeons endorsed by the American Association of Cardiovascular and Pulmonary Rehabilitation and the Society for Academic Emergency Medicine". JACC. 50 (7): e1–e157. PMID 17692738. Text "doi:10.1016/j.jacc.2007.02.013 " ignored (help); Unknown parameter |month= ignored (help)

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