LV function can be assessed by a variety of modalities (eg, contrast ventriculography, echocardiography, CT angiography). However, a transthoracic echocardiogram is most useful. It is noninvasive, relatively inexpensive, and helps provide a comprehensive assessment of the LV function (regional and global) and size, and rule out post-MI mechanical and other complications. Clinical Recommendation(s) 2013 ACCF/AHA Guideline for the Management of Patients With ST-Elevation Myocardial Infarction12 1. LVEF should be measured in all patients with STEMI. (Class I, Level of Evidence: C) 2014 AHA/ACC Guideline for the Management of Patients With Non ST-Elevation Acute Coronary Syndromes11 1. A noninvasive imaging test is recommended to evaluate LV function in patients with definite ACS.54 58 (Class I, Level of Evidence: C) ACC indicates American College of Cardiology; ACCF, American College of Cardiology Foundation; ACS, acute coronary syndrome; AHA, American Heart Association; AMI, acute myocardial infarction; CT, computed tomography; LV, left ventricular; LVEF, left ventricular ejection fraction; LVSD, left ventricular systolic dysfunction; LVSF, left ventricular systolic function, MI, myocardial infarction; NSTEMI, non ST-elevation myocardial infarction; and STEMI, ST-elevation myocardial infarction. Appendix A. Continued 21 Short Title: PM-6: ACEI or ARB for LVSD PM-6: AMI: ACEI or ARB Prescribed for LVSD at Discharge Measure Description: Percentage of patients, age 18 y, hospitalized with AMI and LVSD who are prescribed an ACEI or ARB at hospital discharge. Numerator Patients with AMI with LVSD (defined as chart documentation of a LVEF <40% or a narrative description of LVSF consistent with moderate or severe systolic dysfunction) who are prescribed an ACEI or ARB* at hospital discharge *Fixed dose combination medications that contain ACEI or ARB therapy fulfill the numerator criteria if prescribed (eg, the ARNI, sacubitril/valsartan, contains the ARB valsartan and would fulfill the measure criteria if prescribed). 