Abstract
Over the past decade, many advances have been made in the understanding of acute coronary syndromes and in the development of thrombolytic and antithrombotic regimens used to improve clinical outcome. Based on their similar pathophysiology, clinical presentation, and treatment strategies, the acute coronary syndromes can be viewed as part of a spectrum of myocardial ischemia, which ranges from stable angina to acute Q wave myocardial infarction (MI).(Figure 8.1) These ischemic syndromes share the same underlying pathophysiology, i.e., the long-term asymptomatic development of atherosclerotic plaques followed by acute plaque activation leading to rupture with superimposed local thrombosis.1–3 Based on the large number of ruptured and healed plaques with layers of thrombus found at autopsy, it is estimated that the vast majority of ruptured plaques are clinically silent, producing only a mild degrees of coronary stenosis.4 In some patients, however, the amount of local thrombosis is more extensive and a flow limiting coronary stenosis results; this process leads to myocardial ischemia, with or without some degree of myocardial necrosis, clinically manifest as unstable angina or a non-Q wave MI. If plaque rupture and thrombosis are extensive, complete occlusion of the coronary artery can occur, producing clinically persistent ischemic pain and ST segment elevation, in patients without adequate collateral circulation, which usually evolves into a Q-wave MI.
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Cannon, C.P., Loscalzo, J. (1999). Thrombolytic and Antithrombotic Therapies for Acute Coronary Syndromes. In: Contemporary Concepts in Cardiology. Developments in Cardiovascular Medicine, vol 217. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5007-5_8
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DOI: https://doi.org/10.1007/978-1-4615-5007-5_8
Publisher Name: Springer, Boston, MA
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