…descending artery (PDA) in a left dominant circulation (i.e. 10 15% of cases). Clinically, patients present with severe chest pain, diaphoresis, hypotension, pulmonary edema…

…and form of the thrombus, it will occlude the main pulmonary artery or its branches. The larger the thrombus, the more proximal the occlusion and…

…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…

…acute myocardial infarction, pericarditis/myocarditis or pulmonary embolism is often a reversible arrhythmia with low risk of recurrence. Atrial fibrillation in other circumstances (particularly those…

…of patients with suspected ST segment elevation myocardial infarction to a percutaneous coronary intervention capable hospital. The initial ECG should be interpreted in conjunction with…

…cardiologists – particularly interventional cardiologists – this knowledge is of critical importance as they must be able to directly pinpoint where the coronary artery occlusion is located…

…spasm may account for the ischaemia. STEMI usually results from rapid thrombotic occlusion of a previously atherosclerotic coronary artery. Slowly progressive severe stenoses are less…

…in the atria, left atrial appendage (LAA), ventricles, valves, and proximal aorta can cause stroke, TIA (transient ischemic attack), coronary artery occlusion, and peripheral embolization…

…the right coronary artery (RCA). The RCA also supplies the inferior left ventricular wall in over 90% of all individuals. Hence, a proximal occlusion (in…

…are robust indicators of successful reperfusion (patent artery). This is also associated with better prognosis, return of R wave amplitudes, and improved left ventricular function…

…of the stenosis/occlusion, microvascular function, myocardial oxygen extraction, presence of collateral circulation, etc –ischemia may also develop during resting conditions. Indeed, in patients with…

…Additional features associated with greater difficulty include a previously failed attempt, a blunt proximal stump, vessel bending, calcification and an occlusion length of at least…

…NSTEMI) since they present with ST segment depressions on the 12 lead ECG (recall that ST segment depression is the hallmark of NSTE ACS/NSTEMI…

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

…occur simultaneously (if both territories are affected by the same artery occlusion). Approximately 30% of patients with posterolateral infarction will also have right ventricular infarction…

…no coronary artery occlusion can be identified. Injection of contrast media into the ventricle will instead reveal that the apical portion of the left ventricle…

…with an initial STEMI pattern has myocardial infarction as the final diagnosis. The underlying process usually involves acute thrombotic obstruction of an epicardial coronary artery…

…circumflex artery before a 60 minute occlusion of the left anterior descending coronary artery (LAD) would reduce the infarct size by 60%, as compared with…

…30 days if left untreated. Moreover, the pathophysiology of NSTEMI and unstable angina is very similar: both are due to partial (incomplete) coronary artery occlusions …

…progression of native coronary artery disease. The chronic total occlusion is an important predictor of incomplete anatomical revascularization with PCI. PCI of chronic total occlusion…

…coronary occlusion or relatively prolonged moderate ischemia may produce post ischemic stunning. In the absence of infarction, contractile recovery can occur rapidly after reperfusion, with…

…segment depressions with prominent T waves in the majority of the chest leads may indicate an acute occlusion in the LAD (left anterior descending artery)…

…coronary artery occlusions. This is discussed in detail in the chapter NSTEMI (Non ST Elevation Myocardial Infarction). Orientation of myocardial fibers The orientation of myocardial…

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

…left main coronary artery disease . It integrates multiple variables, including the number of lesions, their location, and specific characteristics such as bifurcations, chronic total occlusions…

…sustained heavy consumption is associated with hypertension, coronary artery disease, arrhythmias, heart failure and alcohol related cardiomyopathy. The cardiovascular implications of lower alcohol intake remain…

…reperfusion therapy. This approach fails to identify a substantial proportion of patients with acute coronary occlusion (ACO) who present without diagnostic ST elevation, often resulting…

…is caused by partial occlusion of the artery (i.e. coronary blood flow is not completely obstructed). NSTE ACS typically presents with ST segment depressions…

…acute total occlusion of an epicardial coronary artery (i.e. STEMI), pathological Q waves can develop already within 2 hours after the onset of infarction…

…19th century first linked thrombotic occlusion of a coronary artery with myocardial necrosis. Although early clinical descriptions emerged at the dawn of the 20th century…

…subepicardium over several hours. The extent and tempo of injury are influenced by collateral flow, myocardial oxygen consumption, and intermittent occlusion with reperfusion. Prompt reperfusion…

…and the ensuing atherothrombosis, causes a complete occlusion of the coronary artery. Ischemia will extend from the endocardium to the epicardium in the affected myocardial…

…and the ensuing atherothrombosis, causes a complete occlusion of the coronary artery. Ischemia will extend from the endocardium to the epicardium in the affected myocardial…

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

…with ACS. Clinical manifestations therefore commonly include recurrent myocardial ischaemia, recurrent infarction, or acute coronary occlusion. Stent thrombosis may occur within hours or days of…

…coronary artery bypass grafting (CABG), or percutaneous coronary intervention (PCI), including attempted recanalization of a chronic total coronary occlusion. Angina or ischaemia with non obstructive…

…and epigastrium, combined with patient denial, often leads to a mistaken impression of indigestion. STEMI pain can simulate pain from acute pericarditis, pulmonary embolism, acute…

…Their duration is short; they typically disappear within minutes after a total occlusion in a coronary artery occurs (then of course, the ST segment will…

…The thrombosis causes occlusion of the artery; blood flow may be partially or completely obstructed. Consequently, the myocardium supplied by the occluded artery becomes ischemic…

…by rhabdomyolysis, with potential renal failure and increased mortality. Clinical presentation and symptoms Symptoms commonly develop rapidly, often within an hour of arterial occlusion. The…

…is still indicated with continuing ischaemia, shock, serious arrhythmia or acute heart failure. Routine opening of a persistently occluded infarct related artery in a stable…

…cardiovascular death, and progression of atherosclerotic disease in patients with established coronary or other atherosclerotic vascular disease. Antiplatelet therapy is a central component because platelet…

…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…

…epicardial artery, because the defining abnormality is inadequate distal perfusion in the absence of a major residual epicardial obstruction. No reflow is associated with serious…

…Coronary dissection with obstruction of the true lumen Occlusion of a major epicardial artery or bypass graft Side branch occlusion or thrombus Disruption of collateral…

…The standard investigation in acute stroke to identify large vessel occlusion, dissection or other vascular pathology CT perfusion Used with an unclear time of onset…

…failure — compression of both legs acutely increases preload. Untreated deep vein thrombosis in the acute phase. Septic phlebitis, ongoing soft tissue infection with systemic involvement…

…linking). Concurrent activation of the coagulation cascade leads to thrombin generation and fibrin deposition, culminating in a partially or fully occlusive intraluminal thrombus [5] . ACS…