Myocardial Infarction

Angioplasty possibly no better than drug therapy

For patients with stable coronary artery disease (CAD) who are not experiencing a heart attack and an abnormal stress test, treatment of their narrowed arteries by the common procedure of angioplasty may not provide additional ...

Dec 09, 2013
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Results from the NOBLE trial presented

Coronary artery bypass (CABG) surgery is the standard treatment for revascularization in patients with left main coronary artery (LMCA) disease, but use of percutaneousa coronary intervention (PCI) for this indication is ...

Oct 31, 2016
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Heart attack shown to be 'systemic condition'

An acute heart attack should not be viewed in isolation – myocardial infarction is a "systemic" condition with an impact upon the whole body and engenders responses in other organs, such as liver and spleen. That is the ...

Jun 28, 2017
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Results from the DAPT STEMI trial reported

November 1, 2017 - The first trial to evaluate the safety of dual antiplatelet therapy (DAPT) for less than 12 months in ST-elevation myocardial infarction (STEMI) found six months of DAPT was non-inferior to 12 months of ...

Nov 02, 2017
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Researchers confirm link between flu and heart attack

Chances of a heart attack are increased six-fold during the first seven days after detection of laboratory-confirmed influenza infection, according to a new study by researchers at the Institute for Clinical Evaluative Sciences ...

Jan 24, 2018
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Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, results from the interruption of blood supply to a part of the heart, causing heart cells to die. This is most commonly due to occlusion (blockage) of a coronary artery following the rupture of a vulnerable atherosclerotic plaque, which is an unstable collection of lipids (cholesterol and fatty acids) and white blood cells (especially macrophages) in the wall of an artery. The resulting ischemia (restriction in blood supply) and ensuing oxygen shortage, if left untreated for a sufficient period of time, can cause damage or death (infarction) of heart muscle tissue (myocardium).

Classical symptoms of acute myocardial infarction include sudden chest pain (typically radiating to the left arm or left side of the neck), shortness of breath, nausea, vomiting, palpitations, sweating, and anxiety (often described as a sense of impending doom). Women may experience fewer typical symptoms than men, most commonly shortness of breath, weakness, a feeling of indigestion, and fatigue. Approximately one-quarter of all myocardial infarctions are "silent", that is without chest pain or other symptoms.

Among the diagnostic tests available to detect heart muscle damage are an electrocardiogram (ECG), echocardiography, cardiac MRI and various blood tests. The most often used blood markers are the creatine kinase-MB (CK-MB) fraction and the troponin levels. Immediate treatment for suspected acute myocardial infarction includes oxygen, aspirin, and sublingual nitroglycerin.

Most cases of STEMI (ST elevation MI) are treated with thrombolysis or percutaneous coronary intervention (PCI). NSTEMI (non-ST elevation MI) should be managed with medication, although PCI is often performed during hospital admission. In people who have multiple blockages and who are relatively stable, or in a few emergency cases, bypass surgery may be an option, especially in diabetics.

Heart attacks are the leading cause of death for both men and women worldwide. Important risk factors are previous cardiovascular disease, older age, tobacco smoking, high blood levels of certain lipids (triglycerides, low-density lipoprotein) and low levels of high density lipoprotein (HDL), diabetes, high blood pressure, obesity, chronic kidney disease, heart failure, excessive alcohol consumption, the abuse of certain drugs (such as cocaine and methamphetamine), and chronic high stress levels.

This text uses material from Wikipedia licensed under CC BY-SA

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