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Myocardial infarction - Wikipedia, the free encyclopedia The term myocardial infarction is derived from myocardium (the heart muscle) and infarction (tissue death due to oxygen starvation or ischemia). Acute myocardial infarction is usually characterized by varying degrees of chest pain, discomfort, sweating, weakness, nausea, vomiting, and arrhythmia, sometimes causing loss of consciousness and even sudden death. Myocardial rupture is most common three to five days after myocardial infarction, commonly of small degree, but may occur one day to three weeks later, in as many as 10% of all MIs. en.wikipedia.org /wiki/Myocardial_infarction   (3552 words)

Myocardial Infarction Occlusive intracoronary thrombus - a thrombus overlying an ulcerated or fissured stenotic plaque causes 90% of transmural acute myocardial infarctions. Acute myocardial infarction with rupture and tamponade, gross. Cardiac troponin I in the diagnosis of myocardial injury and infarction. www-medlib.med.utah.edu /WebPath/TUTORIAL/MYOCARD/MYOCARD.html   (1837 words)

Myocardial infarction - Voyager, the free encyclopedia   (Site not responding. Last check: 2007-11-01) The most important treatment in myocardial infarction is restoring the blood flow to the heart, by thrombolysis (enzymatically dissolving the clot in the artery) and/or angioplasty (using a balloon to push the artery open). Acute myocardial infarction is usually characterized by varying degrees of chest pain or discomfort, weakness, sweating, nausea, vomiting, and arrhythmias, sometimes causing loss of consciousness. Yet many myocardial infarctions, tending to be smaller, are not recognized by victims, never receive medical attention and result in either sudden death or progressive heart weakness. www.voyager.in /Heart_attack   (2544 words)

MYOCARDIAL VIABILITY The presence of redistribution is a marker for myocardial ischemia and viability. Regions with a concordant reduction in perfusion and FDG uptake (matched pattern) have predominantly myocardial scar as the cause of regional asynergy and are considered nonviable.. Overall, the demonstration of substantial viable myocardium by dobutamine stress echocardiography, myocardial perfusion or metabolic imaging is a key prognostic factor in patients with CAD and resting LV dysfunction. sprojects.mmi.mcgill.ca /cme/olj/titles/nuc010803root/nuc010803.html   (2558 words)

Myocardial Viability with Prior Infarcts The aim of this study was to compare perfusion patterns on myocardial contrast echocardiography with those on myocardial perfusion scintigraphy for the assessment of myocardial viability in patients with previous myocardial infarction. Myocardial perfusion scintigraphy (MPS) is an established method for the assessment of myocardial viability in the clinical setting. Recently, myocardial contrast echocardiography (MCE) with intracoronary injection of microbubbles has been demonstrated to be useful for the assessment of myocardial viability in patients with both recent MI and those with poor left ventricular systolic function associated with chronic coronary artery disease. persival.cs.columbia.edu /scenario/articles/article6.html   (2281 words)

eMedicine - Myocardial Ischemia : Article by Michael E Zevitz, MD Silent myocardial ischemia is indicated by lack of symptoms in the presence of documented ECG or nuclear imaging evidence of myocardial ischemia. Myocardial FFR is a recently developed index of the functional severity of coronary stenoses that is calculated only from simultaneous pressure measurement proximal and distal to a stenosis obtained with a pressure-monitoring guidewire. Current understanding of myocardial ischemia suggests that the favored management approach is to appropriately and aggressively pursue all causes of myocardial ischemia and to appropriately treat all reversible causes until clinical and/or perfusion studies confirm that the myocardial ischemia is maximally reduced or eliminated. www.emedicine.com /med/topic1568.htm   (12860 words)

Nikon MicroscopyU: Human Pathology Digital Image Gallery - Myocardial Infarction (Old) Myocardial infarction is the necrosis of a section of heart muscle tissue, most commonly from coronary occlusion. Though initially called coronary thrombosis due to the primary cause of the condition, eventually myocardial infarction became the preferential term due to the fact that death to the heart muscle is directly responsible for the pain and other signs of a heart attack, rather than the arterial blockage that usually precedes it. Myocardial Infarction at 10x Magnification - Controlling weight as well as blood pressure and cholesterol levels is very important for heart-attack survivors and can often be achieved with a low-fat diet containing many fruits and vegetables and regular exercise. www.microscopyu.com /galleries/pathology/myocardialinfarctionold.html   (740 words)

Myocardial Infarction The traditional concept that myocardial infarctions can be classified as transmural or nontransmural on the basis of the presence or absence of Q waves is misleading, since autopsy studies have demonstrated convincingly that pathologic Q waves may be associated with nontransmural infarction and may be absent with transmural infarction. Reference:Montalescot,G. and others,Platelet glycoprotein IIb/IIIa inhibition with coronary stenting for acute myocardial infarction,N.Engl.J.Med.,Vol.344,No.25.June 21,2001,PP.1895-903. Myocardial necrosis (i.e.MI) is said to be present if the maximal concentration of cTnT or cTnI exceeds the decision limit (99 percent of the values for a reference control group) on at least one occasion during the 24 hours after the index clinical event. www.rjmatthewsmd.com /Definitions/myocardial_infarction.htm   (11222 words)

Myocardial Diseases of the Cat Myocardial diseases that affect cats encompass a diverse collection of idiopathic and secondary diseases affecting the myocardium, and the spectrum of anatomic and pathophysiologic characteristics of these diseases is wide. The myocardial disease of some cats does not fit neatly into the categories of hypertrophic, dilated, or restrictive cardiomyopathy; rather, it is considered "indeterminate" or unclassified myocardial disease. Myocardial hypertrophy develops as a compensatory response to certain identifiable stresses or disease; marked left ventricular wall and septal thickening and clinical heart failure can occur in some cats. www.maxshouse.com /Cardiology/myocardial_diseases_of_the_cat.htm   (7969 words)

Lancaster General Hospital - Myocardial Perfusion Scan, Resting   (Site not responding. Last check: 2007-11-01) This means that a tiny amount of a radioactive substance, called a radionuclide (radiopharmaceutical or radioactive tracer), is used during the procedure to assist in the examination of the tissue under study. A resting myocardial perfusion scan is used to assess the blood flow to the heart muscle (myocardium) and to determine what areas of the myocardium have decreased blood flow. A resting myocardial perfusion scan may be performed on an outpatient basis or as part of your stay in a hospital. www.lancastergeneral.org /content/greystone_27182.asp   (1537 words)

Myocardial Perfusion Imaging - Draft   (Site not responding. Last check: 2007-11-01) Myocardial perfusion imaging is not typically performed during the acute phase of an acute MI when a diagnosis has been established by other methods. Myocardial perfusion imaging may be useful in adjunct to other tests in the diagnosis or treatment of unstable angina only when the combination of history and other tests are not diagnostic. Myocardial perfusion imaging is a well-established technology in the diagnosis and management of coronary artery disease. www.cignamedicare.com /partb/lmrp_lcd/id/drafts/2004-10.html   (1410 words)

Heart Attack | Myocardial Infarction A heart attack or myocardial infarction is a medical emergency in which the supply of blood to the heart is suddenly and severely reduced or cut off, causing the muscle to die from lack of oxygen. More than 1.1 million people experience a heart attack (myocardial infarction) each year, and for many of them, the heart attack is their first symptom of coronary artery disease. A heart attack (myocardial infarction) is usually caused by a blood clot that blocks an artery of the heart. www.csmc.edu /5186.html   (1280 words)

MedlinePlus Medical Encyclopedia: Myocardial biopsy Myocardial biopsy is a diagnostic procedure in which a small piece of heart muscle tissue is removed for examination. Myocardial biopsy is performed similarly to (or as part of) cardiac catheterization. When myocardial biopsy is performed by itself, the jugular vein in the neck is most commonly used. www.nlm.nih.gov /medlineplus/ency/article/003873.htm   (599 words)

Imaginis - Heart Disease - Myocardial Infarction (Heart Attack) Myocardial infarction (heart attack) is a serious result of coronary artery disease. Myocardial infarction occurs when a coronary artery is so severely blocked that there is a significant reduction or break in the blood supply, causing damage or death to a portion of the myocardium (heart muscle). In addition to atherosclerosis, myocardial infarction may result from a temporary contraction or spasm of a coronary artery. www.imaginis.com /heart-disease/heartattack.asp   (823 words)

Myocardial resection   (Site not responding. Last check: 2007-11-01) Myocardial resection is a surgical procedure in which a portion of the heart muscle is removed. Myocardial resection is done to improve the stability of the heart function or rhythm. The risks of myocardial resection are based in large part on the person's underlying heart condition and, therefore, vary greatly. www.healthatoz.com /healthatoz/Atoz/ency/myocardial_resection.jsp   (577 words)

MedlinePlus Medical Encyclopedia: Myocardial contusion Myocardial contusion is a "bruise" of the heart muscle, often caused by blunt trauma to the chest following falls, motor vehicle accidents, or cardio-pulmonary resuscitation (CPR). The main complication is that the bruising may lead to myocardial infarction (heart muscle death). Keys to preventing myocardial contusion are basic safety precautions, including wearing a seat belt when driving and purchasing an automobile with air bags. www.nlm.nih.gov /medlineplus/ency/article/000202.htm   (399 words)

Postgraduate Medicine: Classic Q wave myocardial infarction As with all types of myocardial injury, Q wave infarction is initiated in most instances by a thrombus superimposed on preexisting atherosclerotic plaque plus some degree of associated local vasoconstriction. Because about 50% of deaths from acute myocardial infarction occur in the first hour after symptom onset (and are due to ventricular tachyarrhythmias), early recognition of symptoms and prompt transport to a medical facility are critical, and these are also goals of public education (4,5). Immediate-release nifedipine (Procardia) is contraindicated in patients with acute myocardial infarction. www.postgradmed.com /issues/2002/07_02/vacek3.htm   (3513 words)

Myocardial Infarction "post myocardial infarction syndrome" due to autoimmune reaction between autoantibody and antigens produced by the necrotic tissues. drug therapy to support myocardial contractility and workload, intra-aortic balloon pump, surgical repair if drug therapy fails or the rupture is wide. Longo E, Cohen L, "Rupture of interventricular septum in acute myocardial infarction". www.geocities.com /baddarni/Myocardial-Infarction.html   (1560 words)

Myocardium - Wikipedia, the free encyclopedia The blood supply of the myocardium is by the coronary arteries. If these arteries are occluded by atherosclerosis and/or thrombosis, this can lead to angina pectoris or myocardial infarction. Certain viruses lead to inflammation of the myocardium, or myocarditis. en.wikipedia.org /wiki/Myocardium   (181 words)

Postgraduate Medicine: Non-Q wave myocardial infarction Non-Q wave myocardial infarction is characterized by coronary symptoms, elevated cardiac enzyme levels, and ischemic electrocardiographic (ECG) changes without the development of Q waves (table 1). Non-Q wave myocardial infarction is less extensive and has a lower in-hospital mortality rate than Q wave infarction but involves a greater percentage of jeopardized myocardium, leading to a higher incidence of reinfarction and recurrent angina. The occurrence of death, myocardial infarction, or a failed symptom-limited exercise treadmill test at 6 weeks was similar between the two groups. www.postgradmed.com /issues/2000/02_00/tamberella.htm   (2917 words)

Medical Dictionary: Myocardial infarction - WrongDiagnosis.com The underlying cause of a heart attack is usually "coronary thrombosis", which is a blockage of the blood vessels of the heart. Myocardial infarction: Presence of a thrombus in a coronary artery, often causing a myocardial infarction. Myocardial infarction : gross necrosis of the myocardium, as a result of interruption of the blood supply to the area. www.wrongdiagnosis.com /medical/myocardial_infarction.htm   (645 words)

Myocardial infarction definition - Medical Dictionary definitions of popular medical terms The term "myocardial infarction" focuses on the myocardium (the heart muscle) and the changes that occur in it due to the sudden deprivation of circulating blood. The main change is necrosis (death) of myocardial tissue. Heart Attack - Overview on heart attack (myocardial infarction) and heart attack symptoms including signs of a heart attack, includes causes, risk factors, prevention, and treatment. www.medterms.com /script/main/art.asp?articlekey=26016   (159 words)

NIH-CSR Myocardial Ischemia and Metabolism [MIM] (CVSIRG) Regional and global myocardial ischemia/reperfusion: mechanisms of ischemia/reperfusion tissue injury, myocardial stunning, infarction, hibernation and the effects of aging. Applications that examine myocardial ischemia/reperfusion in the context of focused clinical, population, and integrative studies may be appropriately assigned to CICS. Studies of myocardial genetics focusing on myocardial ischemia or myocardial metabolism could be assigned to MIM. cms.csr.nih.gov /PeerReviewMeetings/CSRIRGDescription/CVSIRG/MIM.htm   (1176 words)

CLINICAL GUIDELINE: PART I: Guidelines for Risk Stratification after Myocardial Infarction -- 126 (7): 556 -- Annals of ... patients who have had myocardial infarction [7, 8]. Temporal changes in the care and outcomes of elderly patients with acute myocardial infarction, 1987 through 1990. Randomised trial of intravenous atenolol among 16 027 cases of suspected acute myocardial infarction: ISIS-1. www.annals.org /cgi/content/full/126/7/556   (2613 words)

eMedicine - Myocardial Infarction : Article by Drew E Fenton, MD   (Site not responding. Last check: 2007-11-01) The appearance of cardiac markers in the circulation generally indicates myocardial necrosis and is a useful adjunct to diagnosis. For early detection of myocardial necrosis, sensitivity of this laboratory test is superior to that of the CK-MB. Alpert JS, Thygesen K, Antman E, Bassand JP: Myocardial infarction redefined--a consensus document of The Joint European Society of Cardiology/American College of Cardiology Committee for the redefinition of myocardial infarction. www.emedicine.com /EMERG/topic327.htm   (9422 words)

Clinical Trial: Erythropoietin in Acute Myocardial Infarction We wish to perform a randomised double-blind, placebo-controlled clinical trial to examine the effects of EPO given at the time of primary angioplasty for acute myocardial infarction (MI) on myocardial infarct size. In this trial the null hypothesis is that there is no effect of EPO on myocardial infarct size, the alternative hypothesis is that EPO reduces myocardial infarct size. Myocardial infarcts will be detected by late contrast gadolinium enhancement. www.clinicaltrials.gov /ct/show/NCT00149058   (744 words)

Collaborative overview of randomised trials of antiplatelet therapy Prevention of death, myocardial infarction, and ...   (Site not responding. Last check: 2007-11-01) Collaborative overview of randomised trials of antiplatelet therapy Prevention of death, myocardial infarction, and stroke by prolonged antiplatelet therapy in various categories of patients -- 308 (6921): 81 -- BMJ Collaborative overview of randomised trials of antiplatelet therapy Prevention of death, myocardial infarction, and stroke by prolonged antiplatelet therapy in various categories of patients myocardial infarction, or vascular death) in the 32 trials of bmj.bmjjournals.com /cgi/content/full/308/6921/81   (11048 words)

Myocardial Infarction (Heart Attack) A myocardial infarction (MI) is the medical term for a heart attack. When a coronary artery has become so narrowed that blood flow is cut off, a part of the heart muscle may die. This is a myocardial infarction (MI), sometimes called a heart attack. www.hmc.psu.edu /heartandvascular/patient/articles/pe101.htm   (455 words)

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