CARE-CP（测试胸痛患者的心血管动态快速评估） (CARE-CP)

Patients randomized to this arm are discharged and receive outpatient evaluation, or cardiovascular ambulatory rapid evaluation (CARE), focused on medical management for cardiovascular risk factors (e.g. hypertension) within 72 hours of Emergency Department discharge.

Subjects will receive an outpatient evaluation within 72 of being discharged from the ED.

• CARE-CP（心血管门诊快速评估）

Patients randomized to this arm receive evaluation for their symptoms in a hospital ward, observation unit, or emergency department boarding.

Patients randomized to this arm receive evaluation for their symptoms in a hospital ward, observation unit, or emergency department boarding.

Time spent in a hospital setting at 30 days post-randomization will be measured and subtracted from time spent outside the hospital. Hospital time is broadly defined, based on a patient-centered definition of cumulative time spent in the ED, observation unit, or hospital ward. Consistent with prior trials, patients who experience death during the follow-up period are assigned zero HFDs.

Time spent in a hospital setting at 1 year post-randomization will be measured and subtracted from time spent outside the hospital. Hospital time is broadly defined, based on a patient-centered definition of cumulative time spent in the ED, observation unit, or hospital ward. Consistent with prior trials, patients who experience death during the follow-up period are assigned zero HFDs.

Rates of cardiovascular rehospitalizations at 30-days post-randomization will be analyzed between the two treatment arms.

Rates of cardiovascular rehospitalizations at 1 year post-randomization will be analyzed between the two treatment arms.

The rates of noninvasive testing (stress testing and coronary computed tomography angiography), at 30-days post-randomization will be analyzed between the two treatment arms.

The rates of noninvasive testing (stress testing and coronary computed tomography angiography), at 1 year post-randomization will be analyzed between the two treatment arms.

The rates of invasive testing (coronary angiography), at 30-days post-randomization will be analyzed between the two treatment arms.

The rates of invasive testing (coronary angiography), at 1 year post-randomization will be analyzed between the two treatment arms.

The rates of Cardiovascular repeat ED visits at 30-days post-randomization will be analyzed between the two treatment arms.The ED visit will be categorized as cardiovascular if a cardiac procedure is performed, the primary reason for admission is possible ACS, or a discharge diagnosis relates to chest pain, MI, ACS, heart failure, or other cardiac disease (e.g., dysrhythmia, pericardial disease, etc.). Cardiac procedures include stress testing, noninvasive and invasive coronary angiography, coronary revascularization, and pacemaker or defibrillator insertion.

The rates of Cardiovascular repeat ED visits at 1 year post-randomization will be analyzed between the two treatment arms.The ED visit will be categorized as cardiovascular if a cardiac procedure is performed, the primary reason for admission is possible ACS, or a discharge diagnosis relates to chest pain, MI, ACS, heart failure, or other cardiac disease (e.g., dysrhythmia, pericardial disease, etc.). Cardiac procedures include stress testing, noninvasive and invasive coronary angiography, coronary revascularization, and pacemaker or defibrillator insertion.

The rates of Cardiovascular rehospitalizations at 30-days post-randomization will be analyzed between the two treatment arms.The rehospitalization will be categorized as cardiovascular if a cardiac procedure is performed, the primary reason for admission is possible ACS, or a discharge diagnosis relates to chest pain, MI, ACS, heart failure, or other cardiac disease (e.g., dysrhythmia, pericardial disease, etc.). Cardiac procedures include stress testing, noninvasive and invasive coronary angiography, coronary revascularization, and pacemaker or defibrillator insertion.

The rates of Cardiovascular rehospitalizations at 1 year post-randomization will be analyzed between the two treatment arms.The rehospitalization will be categorized as cardiovascular if a cardiac procedure is performed, the primary reason for admission is possible ACS, or a discharge diagnosis relates to chest pain, MI, ACS, heart failure, or other cardiac disease (e.g., dysrhythmia, pericardial disease, etc.). Cardiac procedures include stress testing, noninvasive and invasive coronary angiography, coronary revascularization, and pacemaker or defibrillator insertion.

Satisfaction will be assessed using the Short Assessment of Patient Satisfaction (SAPS). A patient satisfaction survey will be sent that evaluates clinician communication, participation in medical decision-making, respect by the clinician, clinician carefulness, time with the clinician, and treatment effect, in any service setting on a five-point Likert scale from "very dissatisfied" to "very satisfied". Scores from each item are summed and range from 0 (extremely dissatisfied) to 28 (extremely satisfied).

Experience will be measured using the Generic Short Patient Experience Questionnaire (GS-PEQ). A patient experience survey will also be sent out to evaluate which assesses timeliness and organization of medical services, confidence in the clinician and treatment, patient involvement in decision-making, clinician communication, patient outcomes, and incorrect treatment on a 5-point Likert-scale from "not at all" to "to a very large extent" and one question (on wait times) scored on a 4-point Likert scale from "no" to "yes, way too long. A mean score can be calculated for each patient, with higher scores indicating better experience.

Patient satisfaction, patient experience, and out-of-pocket costs will be measured in all trial participants. Financial records will be utilized from each site to determine patient billing, including the amount covered by insurance vs. patient responsibility. Each item will be measured in U.S. dollars and summed for total cost.

A subset of 100 patients (50 from each arm) will be purposively selected to ensure diversity in sex, race, ethnicity, socioeconomic status (SES), and health literacy for 30-minute semi-structured phone interviews to determine key drivers of patient satisfaction and experience. We will use an explanatory sequential mixed-methods design, in which participants' quantitative data will guide the collection and analysis of their qualitative data.These data will provide key context and meaning to the patient's quantitative response regarding patient satisfaction, experience, and out-of-pocket cost.