although intracoronary nitroglycerin ( ntg ) is frequently administered to patients having occluded coronary arteries undergoing invasive procedures such as percutaneous transluminal coronary angioplasty or thrombolysis , the extent of ntg-induced augmentation of myocardial blood flow in patients with collaterally filled occluded arteries is incompletely understood .
C0205042
coronary arteries
C2936173
procedures