From:  Missed, masked, and manageable: coronary vasospasm in modern cardiology

 Diagnostic modalities for coronary vasospasm.

ParameterCardiac catheterizationStress echocardiography
AccessibilityLowHigh
Economic costHighLow
Radiation exposureHigh (10 mSv)Absent
CO2 emissions100 kg1 kg
StressAcetylcholineHyperventilation, ergonovine
MarkerCoronary diameter changeRWMA, CFV
SensitivityVery highHigh

CFV: coronary flow velocity; RWMA: regional wall motion abnormality.