If this is positive, coronary angiography is typically performed on an urgent basis, as this is highly predictive of a heart attack in the near-future.
Other imaging can be performed by angiography, where a catheter is inserted into the common femoral artery and selectively guided to the artery in question.
However, if a patient coughs up blood (haemoptysis), treatment may be required (usually angiography and embolisation, surgery or taking tranexamic acid).
