Similar to angina but usually more severe, of longer duration (≥30 min), and not immediately relieved by rest or nitroglycerin (Chaps. 119. ST-Segment Elevation Myocardial Infarction and 120. Unstable Angina and Non-ST-Elevation Myocardial Infarction). S3 and/or S4 may be present.
Section 3. Common Patient Presentations