…of occlusion that may provide a window of opportunity for reperfusion. In addition, some patients present with severe LMCA stenosis exacerbated by other conditions, and…

…epicardial stenosis. In some of these patients, microvascular obstruction or epicardial spasm may account for the ischaemia. STEMI usually results from rapid thrombotic occlusion of…

…adequacy of collateral channels. Additional features associated with greater difficulty include a previously failed attempt, a blunt proximal stump, vessel bending, calcification and an occlusion…

…Definition and pathophysiology Peripheral artery disease (PAD) is a clinical disorder caused by stenosis or occlusion of the aorta or arteries supplying the limbs. In…

…epicardial stenosis and without an angiographically evident flow limiting obstruction. Assessment should include: Confirmation that the treated epicardial segment is adequately expanded and not severely…

…common type of ischaemic stroke, resulting from the occlusion of small penetrating arteries that provide blood to deep structures. Lacunar stroke results in five classical…

…perfusion in the absence of a flow limiting epicardial stenosis. It is associated particularly with intervention on degenerated saphenous vein grafts, rotational atherectomy, and acute…

…supplied by the arteries distal to the occlusion or stenosis. If the ischemia persists for 20 minutes, myocardial infarction ensues, resulting in permanent wall motion…

…coronary artery and the location of the occlusion, is clinically important. As discussed below, this information can aid in diagnosing ischemia and infarction and guide…

…the available material does not establish a significant increase in late morbidity or mortality attributable to these events. Clinical presentation and symptoms Most patients with…

…abnormal vasoconstriction of one or more coronary arteries. Epicardial spasm produces a reversible functional occlusion and usually causes transmural ischaemia. The resulting abnormalities in left…

…formation and subsequent coronary occlusion. Plaque rupture typically involves a thin, collagen poor fibrous cap overlying a large lipid core with many macrophages, resulting in…

…hours of awakening has been described. Atypical and painless presentations Pain is not universal. Painless STEMI is more frequent in people with diabetes and becomes…

…by observational studies and clinical experience. Studies have demonstrated that a significant proportion of patients with acute coronary occlusion (ACO) do not exhibit classic ST…

…RCA also supplies the inferior left ventricular wall in over 90% of all individuals. Hence, a proximal occlusion (in the RCA) which cuts off blood…

…sudden deterioration in function. The severity of tissue injury depends on the site, duration and completeness of occlusion and on the adequacy of collateral blood…

…opening of a persistently occluded infarct related artery in a stable and asymptomatic patient is by contrast not recommended [1,5]. STEMI criteria and occlusion…

…as soon as haemorrhage and contraindications have been excluded. CT angiography or transport planning must not delay treatment unnecessarily. 10. In unknown time of onset…

…in LVEF is not the only possible objective of revascularization. Contemporary evidence suggests that protection of jeopardized myocardium from future ischemic events, and prevention of…

…involve partial occlusions, resulting in subendocardial ischemia and comparatively milder symptoms. For the same reason, patients with STEMI are at higher risk of life threatening…

…arterial insufficiency can cause necrosis and, in the worst case, amputation. The decisive step is therefore not the choice of dressing but the ankle brachial…

…based, high and symmetric. Their duration is short; they typically disappear within minutes after a total occlusion in a coronary artery occurs (then of course…

…Occurrence of upsloping ST segment depressions with prominent T waves in the majority of the chest leads may indicate an acute occlusion in the LAD…

…absence of contraindications, using a loading dose followed by maintenance treatment. The source material does not specify the loading dose. Efficacy and harms In secondary…

…rupture or erosion). The dynamic thrombotic component can vary in burden and may lead to distal coronary embolization, resulting in myocyte necrosis. Plaque rupture may…

…PCI of chronic total occlusion lesions may improve angina and quality of life, but randomized trials have not demonstrated reductions in mortality or myocardial infarction…

…particularly V5) and that is not consistent with posterior transmural ischemia. To conclude, patients with chest discomfort who display ST segment depressions in leads V1…

…elevations Successful reperfusion results in rapid and marked normalization (return) of ST segment elevations. If the reperfusion is complete (after a total occlusion) the ST…

…disrupt, resulting in the activation of thrombocytes and coagulation factors causing the formation of a thrombus. Such a thrombus can cause occlusion of the artery…

…ECG does not exhibit ST segment elevations, but the condition should be managed as STEMI (ST Elevation Myocardial Infarction) in terms of treatment and interventions…

…apical portion of the left ventricle is dilated (hence the term apical ballooning syndrome ). This syndrome was first descried in 1991 in Japan and the…

…zone. Coronary Occlusion and Myocardial Injury STEMI generally results from abrupt reduction in coronary blood flow caused by thrombotic occlusion of a previously atherosclerotic artery…

…of a chronic total coronary occlusion. Angina or ischaemia with non obstructive coronary arteries (ANOCA/INOCA), after appropriate investigation has identified the relevant endotype and…

…which causes atherothrombosis resulting in partial (incomplete) occlusion of the coronary artery. NSTE ACS results in one of the following diagnoses: Non ST Elevation Myocardial…

…by the fact that there is no (or very little) turnover of myocardial cells and therefore myocardial troponins should not be detected in the blood…

…a total occlusion in the main artery may not lead to infarction due to the collaterals. Occasionally, patients with total and proximal occlusions may present…

…is caused by a complete coronary artery occlusion, which results in the complete stop of blood flow and thus more extensive myocardial ischemia (referred to…

…which causes atherothrombosis resulting in partial (incomplete) occlusion of the coronary artery. NSTE ACS results in one of the following diagnoses: Non ST Elevation Myocardial…

…Identification of a coronary thrombus by angiography or autopsy, except in type 2 and type 3 MI. A diagnosis of MI should not be made…

…abnormalities in the anterior precordial leads. Acute myocardial ischaemia alters the resting membrane potential and action potential duration of affected myocardial cells. The resulting voltage…

…proximal the occlusion and, hence, the greater the hemodynamic effects. The occlusion has two immediate effects: Reduced perfusion in the pulmonary circulation, resulting in hypoxia…

…ischemia is discussed in the chapter ST elevations in ischemia and differential diagnoses. In cardiac arrest caused by acute total occlusion of an epicardial coronary…

…and contractile function of myocardial fibers The left ventricular wall can be subdivided into several layers. These layers are similar to those seen in arteries…

…appendage and enter the systemic circulation which causes thromboembolic occlusions of arteries in the brain, limbs or other organs. However, the increased risk in mortality…

…complete coronary artery occlusions, and outcomes improved when they were treated as acute STEMI cases. Management of left bundle branch block (LBBB) in patients with…

…and aid in personalized treatment decisions. The SYNTAX Score was created to address the need for a standardized method to evaluate the anatomical complexity of…

…or three in men, or at least four drinks for women or five for men on one occasion. Pharmacokinetics and pathophysiology Approximately 95% of ingested…

…to thrombin generation and fibrin deposition, culminating in a partially or fully occlusive intraluminal thrombus [5] . ACS Classification The clinical spectrum of Acute Coronary Syndromes…