Table 2.
Use of diagnostic modalities and management of patients assigned to the “observe zone” of the ESC 0/1-h algorithm within 30 days of index presentation
| (Non)-invasive diagnostic modalities used | Entire cohort (N = 750) | Various results per diagnostic modality [n = number of patients] |
|---|---|---|
| Non-invasive ischemia testing | 54 (7.2) | Evidence of ischemia [22] |
| Evidence of infarction [9] Non-diagnostic [4] | ||
| Normal exam [19] | ||
|
| ||
| CT pulmonary embolism | 35 (4.7) | Evidence of pulmonary embolism [3] |
|
| ||
| CT thorax angiography | 18 (2.4) | Evidence of aortic dissection [1] |
|
| ||
| Coronary CTA | 27 (3.6) | Normal or non-obstructive CAD (<50% stenosis) [18] |
| 1 vessel disease [2] | ||
| 2 vessel disease [4] | ||
| 3 vessel disease [3] | ||
|
| ||
| ICA | 151 (20.1) | Normal or non-obstructive CAD (<50% stenosis) [38] |
| 1 vessel disease [43] | ||
| 2 vessel disease [28] | ||
| vessel disease [42] | ||
|
| ||
| Management of patients | ||
| Admission to hospital ward | 263 (35.1) | − |
| Return to outpatient clinic | 411 (54.8) | − |
| Revascularization | ||
| PCI | 92 (12.3) | − |
| CABG | 3 (0.4) | − |
Non-invasive ischemia testing included: Stress ECG, stress echocardiography; SPECT, and cardiac MRI, CABG, coronary artery bypass grafting; CAD, coronary artery disease; CCTA, coronary computed tomography angiography; ESC, European Society of Cardiology; ICA, invasive coronary angiography; PCI, percutaneous coronary intervention.