Detection of coronary vasospasm
| Test parameters | Invasive approach | Noninvasive approach |
|---|---|---|
| Operating theater | Catheterization laboratory | Echocardiography laboratory |
| Stress test | Intracoronary acetylcholine | Hyperventilation + exercise |
| Main biomarker | Coronary vasoconstriction | RWMA |
| Ancillary biomarker | IMR | CFV |
| Radiation exposure | 15 mSv (750 chest X-rays) | Absent |
| Iodine contrast material | 50 mL | Absent |
| Intracoronary catheter | Present, perturbs coronary tone | Absent |
| X-rays effect on endothelium | Present, may alter function | Absent |
| Large scale experience | Present | Missing |
mSv: milli Sievert (radiation dose)