Frequency of normal coronary arteriograms in three academic medical centers and one community hospital

MeSH terms

• Angina Pectoris / diagnostic imaging
• Angina Pectoris / drug therapy
• Angiography*
• Coronary Angiography*
• Coronary Disease / diagnostic imaging
• Hospitals, Community*
• Hospitals, Teaching*
• Hospitals, University*
• Humans
• Nitroglycerin / therapeutic use
• Peer Review
• Reference Values
• Retrospective Studies