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Topic: Coronary occlusion

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	Encyclopedia: Myocardial infarction (Site not responding. Last check: 2007-10-09)
		Emergency coronary surgery, in the form of coronary artery bypass surgery is another option, although this option is in decline since the development of primary angioplasty.
		the theory that myocardial infarction is due to thrombosis in the coronary artery.
		Coronary heart disease (CHD), also called coronary artery disease (CAD) and atherosclerotic heart disease, is the end result of the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium (the muscle of the heart).
	www.nationmaster.com /encyclopedia/Myocardial-infarction (5801 words)

	InfoMedics Malaysia
		Later evidence indicated, however, that, though thrombotic occlusion of an atheromatous lesion in a coronary artery is the most common cause of the disorder, the manifestations are the result of the death of an area of heart muscle (infarction).
		The risk of death from an arrhythmia is greatest within the first few minutes of the onset of an occlusion in a coronary artery or of acute ischemia occurring in the region of the myocardium.
		Coronary artery bypass surgery is widely used to restore adequate blood flow to the heart muscle beyond severe atheromatous obstruction in the main coronary arteries.
	www.angelfire.com /md/LeeHH/heart1.html (2614 words)

	Myocardial infarction - Wikipedia, the free encyclopedia
		A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, totally occluding the artery and preventing blood flow downstream.
		One observed mechanism for this phenomenon is the increased arterial pulse pressure stretching and relaxation of arteries with each heart beat which, as has been observed with IVUS, increases mechanical "shear stress" on atheromas and the likelihood of plaque rupture.
		A major breakthrough in the identification of risk factors was the 1956 British doctors study, which showed an increased risk of myocardial infarction in heavy smokers.
	en.wikipedia.org /wiki/Myocardial_infarction (2410 words)

	Acute coronary occlusion: A common cause of heart attack - MayoClinic.com (Site not responding. Last check: 2007-10-09)
		Acute coronary occlusion: A common cause of heart attack
		An acute coronary occlusion is a sudden blockage of one of the coronary arteries, which supply blood to the heart muscle (myocardium).
		The blockage is usually due to a blood clot that forms in an artery (coronary thrombosis) damaged by plaques.
	www.mayoclinic.com /health/heart-attack/AN00462 (206 words)

	APStracts 2:0487H, 1995. (Site not responding. Last check: 2007-10-09)
		Coronary hemodynamics during brief coronary occlusions at different levels of collateral function in conscious ponies.
		Serial data were obtained during a 3 min LAD occlusion prior to stimulation of collateral function by the intermittent coronary occlusion method, and during a 10 min LAD occlusion after 14 +/- 2 days and 27 +/- 2 days of stimulation.
		This study demonstrates that chronic stimulation of collateral function is accompanied by specific alterations in coronary hemodynamics during acute coronary occlusion that hasten the recovery of ischemic myocardium.
	www.uth.tmc.edu /apstracts/1995/heart/November/487h.html (249 words)

	Postgraduate Medicine: Initial appraisal of acute coronary syndrome
		Thus the pathogenic rate-limiting mechanism of acute coronary syndrome appears to be critically dependent on acute thrombosis and the resultant obstruction of the coronary lumen.
		Efforts to demonstrate coronary disease in the emergency department, such as electron beam computed tomography (EBCT) (to detect coronary artery calcium score) and stress testing for radioisotope-defined perfusion defects or echo-defined regional wall-motion abnormalities (alterations in coronary flow reserve), are dependent on significant luminal narrowing and calcification for detection.
		Although thrombotic complications of the atherosclerotic process account for most cases of acute coronary syndrome, there are a few rare etiologic factors that have been proposed as causes of or contributors to acute coronary occlusion.
	www.postgradmed.com /issues/2002/07_02/rosamond1.htm (4145 words)

	British Journal of Pharmacology - Pacing-induced delayed protection against arrhythmias is attenuated by ... (Site not responding. Last check: 2007-10-09)
		Following coronary occlusion, however, widening and fractionation of this summarized R-wave occurs since, because of the inhomogeneity of conduction in the ischaemic myocardium, fibres are not simultaneously activated.
		The risk area following coronary artery occlusion was assessed in each dog at the end of the experiment by injecting patent blue V dye into the re-occluded coronary artery, and was expressed as a percentage of the left ventricular wall together with the septum (Kaszala et al., 1996).
		The haemodynamic effects of coronary artery occlusion were similar in control (sham operated) and paced dogs and are summarized in Table 2.
	www.nature.com /bjp/journal/v127/n7/full/0702695a.html (3848 words)

	The Journal of Invasive Cardiology
		Injuries of the coronary arteries associated with blunt chest trauma predominantly affect the left anterior descending artery.
		Coronary artery occlusion and acute myocardial infarction secondary to blunt chest trauma have been assumed to be a rare occurrence.
		Acute coronary occlusion secondary to the blunt chest trauma.
	www.podiatrytoday.com /jic/displayArticle.cfm?articleID=article727 (1178 words)

	Inhalation of Concentrated Ambient Air Particles Exacerbates Myocardial Ischemia in Conscious Dogs
		Coronary artery occlusions were produced by inflating the vascular occluder with the predetermined volume of saline, maintained for 5 min, and then slowly released.
		Coronary artery occlusion induced a progressive increase in heart rate from an average preocclusion value of 87.3 ± 1.5 beats/min to a peak of 120.7 ± 1.7 beats/min.
		Coronary blood flow is an important determinant of oxygen supply to the heart (Ardehali and Ports 1990).
	ehp.niehs.nih.gov /members/2003/5775/5775.html (5478 words)

	Hyperemic response to coronary occlusion during a single diastole in conscious dog -- Sadick et al. 256 (6): 1645 -- ...
		Hyperemic response to coronary occlusion during a single diastole in conscious dog -- Sadick et al.
		Hyperemic response to coronary occlusion during a single diastole in conscious dog
		diastolic coronary occlusion is dependent on ventricular systole.
	ajpheart.physiology.org /cgi/content/abstract/256/6/H1645 (251 words)

	Influence on collateral flow of recanalising chronic total coronary occlusions: a case-control study -- Pohl et al. 86 ...
		The index was increased at the second balloon occlusion to 0.50, from 0.38 at the first occlusion, in a patient with a moderately severe stenosis of a coronary artery.
		Coronary collateral quantitation in patients with coronary artery disease using intravascular flow velocity or pressure measurements.
		Severity of single-vessel coronary arterial stenosis and duration of angina as determinants of recruitable collateral vessels during balloon angioplasty occlusion.
	heart.bmjjournals.com /cgi/content/full/86/4/438 (3361 words)

	CHEST: Emergency portable cardiopulmonary bypass for abrupt left main occlusion during coronary angioplasty: excellent ... (Site not responding. Last check: 2007-10-09)
		Abrupt coronary artery obstruction during percutaneous transluminal coronary artery angioplasty (PCTA) requiring emergency coronary artery bypass grafting (CABG) may be associated with higher morbidity and mortality when compared to elective CABG.[1] Successful conventional resuscitation involves either traditional cardiopulmonary resuscitation, PTCA, and/or intra-aortic balloon counterpulsation (IABP) until emergent CABG is performed.
		During attempts to pass the guide wire down the circumflex coronary artery, the patient had sudden onset of severe pain due to 100 percent occlusion of the left main coronary artery (Fig 1).
		Coronary artery bypass for unsuccessful percutaneous transluminal coronary angioplasty.
	www.findarticles.com /p/articles/mi_m0984/is_n3_v101/ai_12357315 (886 words)

	Penn State Faculty Research Expertise Database (FRED) (Site not responding. Last check: 2007-10-09)
		Ischemia-induced depressed systolic thickening is transiently augmented by remote coronary occlusion.
		Left anterior descending coronary occlusion elicited an immediate significant increase in posterior bed thickening fraction (TF%) (3.7 +/- 1.5 to 5.9 +/- 1.3%), but by 135 sec TF% had again deteriorated.
		The transient increase in thickening was not caused by increased flow to the posterior bed (microspheres, n = 3), nor was it related to a Frank-Starling mechanism (echocardiography, n = 3).
	fred.hmc.psu.edu /ds/retrieve/fred/publication/1571984 (125 words)

	The risk of coronary occlusion is not proportional to the prior severity of coronary stenoses -- AMBROSE and FUSTER 79 ...
		The risk of coronary occlusion is not proportional to the prior severity of coronary stenoses
		Incomplete lysis of thrombus in the moderate underlying atherosclerotic lesion during intracoronary infusion of streptokinase for acute myocardial infarction: quantitative angiographic observations.
		Angiographic severity of coronary narrowing is a surrogate marker for the extent of coronary atherosclerosis.
	heart.bmjjournals.com /cgi/content/full/79/1/3 (1411 words)

	CHEST: Acute coronary occlusion after recent coronary angioplasty: association with exercise and successful treatment ... (Site not responding. Last check: 2007-10-09)
		The failure of thrombolysis is the cases described by Dash[3] and Nygaard et al[4] induced the authors to postulate that the increase in coronary blood flow provoked by strenuous physical exercise could have determined the progression of a localized dissection into an occlusive intimal flap.
		The coronary occlusion is most likely due to an intraluminal thrombosis occurring in a vessel without significant stenoses.
		Irrespective of what the underlying mechanism may be, acute coronary occlusion related to early exercise stress test after PTCA constitutes a serious complication that, despite the rarity of documented cases, should be taken into account when planning a follow-up program in patients treated with angioplasty.
	www.findarticles.com /p/articles/mi_m0984/is_n2_v98/ai_13468266 (1060 words)

	Symptoms of a Heart Attack (Site not responding. Last check: 2007-10-09)
		This occurs when one of the coronary arteries (the arteries that supply blood to the heart muscle) is blocked by an obstruction, which is often plaque due to heart disease.
		This event is sometimes called a coronary thrombosis or coronary occlusion.
		Cocaine causes constriction of the coronary arteries, which decreases the flow of blood, and hence oxygen, to the heart muscle.
	www.besthearthealth.com /heart.nsf/diseaseswebview/heart+attack (1885 words)

	Society for Cardiovascular Magnetic Resonance - Journal: Volume 2 Issue 2
		Changes in myocardial strain before occlusion, during occlusion, and at 15 and 30 min after reperfusion were determined using repeated-measures analysis of variance.
		After instrumentation but before coronary occlusion, global reductions in myocardial strain were observed relative to animals that did not undergo coronary catheterization procedures.
		During LAD occlusion, maximum myocardial shortening was significantly reduced in the anterior and anteroseptal regions of the left ventricular apex (i.e., ischemic region) but returned to baseline values by 30 min after reperfusion.
	www.scmr.org /journal/jcmr0202/003.shtml (300 words)

	Pressure-controlled continuous coronary sinus occlusion device and methods of use (US6569145)
		Apparatus and methods for perfusing ischemic myocardium are provided using a tubular member having an end region adapted to be disposed in a portion of a patient's venous vasculature.
		An occlusion element optionally may be provided in the end region that retains the tubular member within the patient's venous vasculature and occludes the flow of blow around the lumen.
		Coronary sinus retroperfusion apparatus for the treatment of myocardial ischemia
	www.delphion.com /details?pn=US06569145__ (695 words)

	Reversible myocardial ischemic injury is not associated with increased creatine kinase activity in plasma -- Ishikawa ...
		the specimens was unaware of the duration of coronary occlusion
		After 40 min of coronary occlusion and 24 h of reperfusion, the tissue exhibits irreversibly injured mitochondria (M).
		Histologic and histochemical studies of early myocardial infarcts induced by temporary or permanent occlusion of a coronary artery.
	www.clinchem.org /cgi/content/full/43/3/467 (4932 words)

	Reactive oxygen species are critical mediators of coronary collateral development in a canine model -- Gu et al. 285 ...
		Coronary collateral blood flow expressed as a percentage of normal zone flow in occlusion, occlusion + N-acetylcysteine (NAC), and sham dogs.
		Effect of coronary occlusion on left ventricular function with and without collateral supply during beating heart coronary artery surgery.
		Ischemia-induced coronary collateral growth is dependent on vascular endothelial growth factor and nitric oxide.
	ajpheart.physiology.org /cgi/content/full/285/4/H1582 (4568 words)

	Beating Heart Surgery - Coronary Occlusion
		In beating heart CABG, only proximal occlusion of the target coronary artery is required.
		Distal occlusion has not been found to be necessary unless poor visibility jeopardizes the precision of the anastomosis.
		In order to effectively perform an anastomosis on a coronary artery, whether or not the heart is beating, the anastomotic site must be cleared of blood to allow visualization for accurate suturing.
	docmd.com /medtronic/med2/page10.html (345 words)

	Bioptome-Assisted Coil Occlusion of Coronary Artery Fistula - IHJ March - April 2002 (Site not responding. Last check: 2007-10-09)
		for occlusion of a coronary artery fistula using a bioptome passed via a long sheath positioned at the distal end
		interlocking detachable coils in embolization of coronary arteriovenous fistulas.
		coronary artery to pulmonary artery fistula from an antegrade approach.
	indianheartjournal.com /Mar-Apr2002/bioptome/bioptome.htm (1575 words)

	Mortality After Coronary Artery Occlusion in Different Models of Cardiac Hypertrophy in Rats -- Leenen and Yuan 37 (2): ...
		Incidence of sudden cardiac death associated with coronary artery occlusion in dogs with hypertension and left ventricular hypertrophy is reduced by chronic ß-adrenergic blockade.
		Responses to ligation of a coronary artery in conscious rats and the actions of antiarrhythmics.
		The effect of modification of sympathetic activity on responses to ligation of a coronary artery in the conscious rat.
	hyper.ahajournals.org /cgi/content/full/37/2/209 (3860 words)

	Stunned myocardium -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-09)
		In (The branch of medicine dealing with the heart and its diseases) cardiology stunned myocardium is a state when some section of the
		(The middle muscular layer of the heart wall) myocardium (corresponding to area of a major (Occlusion of a coronary artery caused either by progressive atherosclerosis or by a blood clot) coronary occlusion) shows a form of
		In this situation, while myocardial blood flow (MBF) returns to normal, function is still depressed for a variable period of time.
	www.absoluteastronomy.com /encyclopedia/s/st/stunned_myocardium.htm (133 words)

	ECG Discrimination Between Right and Left Circumflex Coronary Arterial Occlusion in Patients With Acute Inferior ...
		coronary arteriography within 7 days of the onset of symptoms.
		Chia, B-L, Yip, JWL, Tan, H-C, et al (2000) Usefulness of ST elevation II/III ratio and ST deviation in lead I for identifying the culprit artery in inferior wall acute myocardial infarction.
		Viik, J, Lehtinen, R, Turjanmaa, V, et al (1998) Correct utilization of exercise electrocardiographic leads in differentiation of men with coronary artery disease from patients with a low likelihood of coronary artery disease using peak exercise ST-segment depression.
	www.chestjournal.org /cgi/content/full/122/1/134 (2856 words)

	Hardin MD : Coronary Heart Disease (Site not responding. Last check: 2007-10-09)
		LookSmart : Coronary heart disease or coronary occlusion
		Columbia Univ, New York, NY Coronary heart disease / Angina
		Last updated Tuesday, Aug 30, 2005 [pictures of coronary heart disease, coronary artery disease pictures, coronary disease pictures, pictures of coronary artery disease, pictures of coronary disease, cornary heart disease, coranary heart disease, coronarydisease, coronaryheartdisease] [11800
	www.lib.uiowa.edu /hardin/md/coronarydisease.html (89 words)

	Changes in Myocardial Electrical Impedance Induced by Coronary Artery Occlusion in Pigs With and Without ...
		Changes in Myocardial Electrical Impedance Induced by Coronary Artery Occlusion in Pigs With and Without Preconditioning : Correlation With Local ST-Segment Potential and Ventricular Arrhythmias -- Cinca et al.
		occlusion in 11 anesthetized open-chest pigs; these were compared
		after 30 minutes of coronary occlusion, and its onset is better
	circ.ahajournals.org /cgi/content/abstract/96/9/3079 (612 words)

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