Figure 1From: Effectiveness of the Chest Pain Choice decision aid in emergency department patients with low-risk chest pain: study protocol for a multicenter randomized trial Flow diagram showing the integration of study procedures in the flow of patient care. *Candidacy for ED observation unit admission will be assessed after the results of the initial troponin are available in some cases. CTCA, computed tomographic coronary angiography; ED, emergency department; CAD, coronary artery disease; ECG, electrocardiogram.Back to article page