…Stent fracture or collapse Residual edge dissection Incomplete lesion preparation Persistent stenosis within the treated segment Mechanical factors are particularly important because correction of the…

…platelet activation, aggregation, and fibrin formation. Within a stented segment, thrombus may also develop because of disturbed flow, residual dissection, inadequate stent expansion, incomplete apposition…

…probability of unstable angina (UA), and patients whose initial findings are less definitive. The defining electrocardiographic feature is the absence of persistent ST segment elevation…

…Presentation and Symptoms The characteristic symptom prompting activation of the STEMI pathway is ischaemic type chest discomfort, although dyspnoea may also be a presenting feature…

…Criteria for ST Elevation Myocardial Infarction (STEMI) The diagnosis of STEMI relies on specific electrocardiographic thresholds for ST segment elevation measured at the J point…

…LBBB) Electrocardiographic Criteria and Characteristics Left bundle branch block is characterized by a significant reorganization of the activation and recovery patterns within the left ventricle…

…the most distinguishing feature was the characteristic ST segment elevations in leads V1–V3. Prevalence and genetics of Brugada syndrome The prevalence of Brugada syndrome…

…an adjacent reference segment presumed to be relatively normal. This assumption may be incorrect when atherosclerosis is diffuse, leading to underestimation of the overall disease…

…the relationship between the ventricles, the ventriculo arterial connection and the relationship of the great arteries (segmental analysis). Ventricular function is evaluated using ejection fraction…

…myocardial infarction as the final diagnosis. The underlying process usually involves acute thrombotic obstruction of an epicardial coronary artery. A vulnerable atherosclerotic plaque and thrombogenic…

…ST segment depressions occur in both NSTE ACS (NSTEMI and unstable angina pectoris) and STE ACS (STEM). However, the significance of the ST segment depression…

…Such ST segment elevations are extremely common in all populations. They occur in young, old, healthy and diseased individuals. For example, roughly 90% of males…

…cells which depolarized during the end of the QRS complex. Due to this it is sometimes recommended that ST segment deviation be measured in the…

…view (A2C) Horizontal long axis Apical four chamber view (A4C) Segments of the left ventricle Based on anatomical landmarks and autopsy studies (Edwards et al…

…PR interval & PR segment This video lecture is accompanied by the detailed article The normal electrocardiogram (ECG). A brief summary of the video lecture and…

ECG Video lecture: The ST segment: J point, J 60 point, ST depression & ST elevation

…and ECG features of the P wave, PR interval and PR segment The P wave ECG interpretation usually starts with assessment of the P wave…

…means that it should be flat and on the same level as the baseline (recall that the baseline is the level of the PR segment)…

…by using the PR segment as the baseline. Refer to Figure 1 . The QRS complex The QRS complex represents the depolarization (activation) of the ventricles…

…persistent ST segment elevation or an equivalent electrocardiographic pattern in a patient with symptoms of myocardial ischaemia. The immediate therapeutic objective is restoration of coronary…

…reliance on ST segment elevation as the key trigger for emergent reperfusion therapy. This approach fails to identify a substantial proportion of patients with acute…

…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…

…unresponsive. I B In patients without ST segment elevations, urgent angiography is considered after resuscitation if there is a high probability of ongoing myocardial ischemia…

…segment is of special interest in the setting of acute myocardial ischemia. This is explained by the fact that ongoing ischemia causes deviation (shift) of…

Cardiology Introduction Since its initial description in 1992 as a syndrome of right bundle branch block, ST segment elevation, and sudden cardiac death (SCD), Brugada…

…normal ST segments, whereas isolated ST depression in a woman with a low pre test probability is usually a false positive. Indications Evaluation of chest…

…of patients after ST segment elevation myocardial infarction (STEMI), with rates approaching 25% after anterior MI. Thrombi may form early, within 48–72 hours of…

…obstruction. Assessment should include: Confirmation that the treated epicardial segment is adequately expanded and not severely obstructed. Exclusion of coronary dissection compromising the true lumen…

…usually as part of an inferoposterior or posterolateral infarction. Its recognition is clinically important because posterior infarction may not produce conventional ST segment elevation in…

…and the presence of troponin elevation, ACS are classified into unstable angina (UA), non ST segment elevation myocardial infarction (NSTEMI), and ST segment elevation myocardial…

…short; they typically disappear within minutes after a total occlusion in a coronary artery occurs (then of course, the ST segment will be elevated). T…

…of an atherosclerotic plaque followed by platelet activation and coagulation, with formation of an intraluminal thrombus. The clinical spectrum includes unstable angina, non ST segment…

…or catheterization laboratory. A 12 lead ECG must be obtained immediately after ROSC in order to identify cases with ST segment elevations, which demand urgent…

…well with the severity and extent of ischemia. In the setting of moderate ischemia, the myocardium becomes hypokinetic, meaning that the ischemic segments contract less

…1. Sinoatrial arrest. Also note the ST segment elevations (which in this case have no relation to the sinoatrial arrest). As discussed in Chapter 1…

…Method of interpretation Heart rate Heart rhythm The P wave The PR interval The QRS complex The ST segment The T wave The U wave…

…SOVd} = 1.92 + 0.74 \times \text{BSA} ) Definition of aortic aneurysm Sinus of Valsalva 45 mm. Any other segment 40 mm in diameter…

…Denmark, Netherlands and United Kingdom reported a novel ECG syndrome characterized by widespread ST segment depressions and an increased risk of sudden cardiac arrest. They…

…newly detected for the first time, or newly developed during management of an acute illness. The clinical relationship between AF and acute deterioration is often…

…However, intravascular ultrasound has shown that delayed opening of the bridged segment may extend into diastole, so the physiological effect is not limited to systole…

…ICA) for excluding non ST segment elevation acute coronary syndrome (NSTE ACS) in patients with a low to intermediate likelihood of CAD when cardiac troponin…

…denotes treatment with aspirin plus a P2Y12 receptor inhibitor. In the setting of acute coronary syndrome (ACS), DAPT is used to reduce recurrent myocardial infarction…

…up diameter stenosis greater than 50%—occurred in 20–30% of patients, while clinically evident restenosis, manifested by recurrent angina attributable to the treated segment…

…blood flow cannot increase adequately because of flow limiting disease, myocardial ischaemia may develop. The electrical manifestation may be horizontal or downsloping ST segment depression…

…and distal reference segments; assessment of stent expansion and apposition; recognition of edge dissection, tissue prolapse, thrombus, or other acute complications; investigation of restenosis and…

…alternate with viable segments that are dysfunctional because of repeated ischemic episodes or chronic reductions in perfusion. The amount and distribution of both viable and…

…length, trajectory and composition of the occluded segment, including calcium. The quality of the distal target vessel. The configuration and adequacy of collateral channels. Additional…

…bypass beyond diseased segments. The latter may also protect against future proximal disease progression, while stents do not prevent the development of new proximal atherosclerosis…

…presenting with ST segment depressions in V1–V3 should be managed as patients with STE ACS (STEMI) if there are symptoms suggestive of myocardial ischemia…

…capacity, low affinity transporter situated in the S1 and S2 segments of the renal proximal tubule. It accounts for approximately 90% of renal glucose reabsorption…

…embolism, which may manifest as a rightward shift of the ECG axis [2] Causes of Left Axis Deviation: Left ventricular hypertrophy [11] Left heart disease…

…category includes all acute coronary syndromes without significant ST segment elevations on ECG. NSTE ACS is caused by partial occlusion of the artery (i.e…

…segment depression due to digoxin treatment. Adverse effects of digoxin The incidence of adverse drug reactions is high, owing to the narrow therapeutic index of…

…Particularly, the degree of AV block may increase. QRS complex QRS duration becomes prolonged. ST segment ST segment depression may develop. T wave T wave…

…Diminished T wave amplitude Osborn like waves. ST segment elevation in leads V1–V2. All degrees of AV block. Sinus node dysfunction and tach brady…

…the majority of cases, it is only possible to determine the ischemic/infarct area (and thus the culprit) if the ECG displays ST segment elevations…

…diagnosis of Q wave infarction requires that pathological Q waves be present in at least two anatomically contiguous leads. In patients with STEMI, ST segment…

…of 70 years at the onset of the disease. Approximately 12% die within 30 days, compared to the 30 day mortality of STEMI (ST segment…

…with ROSC who did not display ST segment elevations and randomized them to urgent angiography. These trials did not show any benefit of urgent angiography…

…or other pathologies. The software allows for detailed regional analysis of myocardial perfusion, highlighting specific segments of the left ventricle that demonstrate abnormalities. These tools…