…aorta and pulmonary artery A slit like orifice A high origin Acute angle take off An intramural course, including its length Coronary Arterial Segments and…

…arterial connection and the relationship of the great arteries (segmental analysis). Ventricular function is evaluated using ejection fraction, fractional shortening, stroke volume, and myocardial thickness…

…challenge (Figure 1 B). Such ST segment elevations are extremely common in all populations. They occur in young, old, healthy and diseased individuals. For example…

ECG Myocardial ischemia and infarction Definition and Pathophysiology ST segment elevation myocardial infarction (STEMI) is an acute coronary syndrome characterized clinically by acute myocardial ischaemic…

…differential diagnoses, and their ECG appearance, to ischemic ECG changes. This figure must be studied carefully. Figure 3. Differential diagnoses in ST segment depressions. Differential…

…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)…

…and produces more extensive fibrinogen depletion. Successful fibrinolysis is generally accompanied by relief of ischaemic symptoms, at least 50% resolution of ST segment elevation, and…

…Recurrent dynamic ECG changes suggestive of ischaemia, especially intermittent ST segment elevation Patients may initially stabilize and subsequently develop recurrent angina, recurrent ischaemic ECG changes…

…the ST segment should be isoelectric, which means that it should be flat and on the same level as the baseline (recall that the baseline…

…interval and PR segment The P wave ECG interpretation usually starts with assessment of the P wave. The P wave is a small, positive and…

…and infarction Definition and Pathophysiology ST segment elevation myocardial infarction (STEMI) is an acute myocardial infarction associated with a working diagnosis of persistent ST segment…

…to 40 beats per minute and the rhythm is regular. There is always secondary ST T changes, meaning that the ST T segment is discordant (…

…rich proteoglycans, and many smooth muscle cells, leading to a white, platelet rich thrombus. Myocardial vulnerability, largely driven by coronary microvascular dysfunction, also contributes to…

…imbalance between myocardial oxygen supply and demand. In many cases, the initiating process is plaque disruption with thrombosis; other cases result from spasm, microvascular dysfunction…

…Heart rhythm The P wave The PR interval The QRS complex The ST segment The T wave The U wave The QT interval (QTc) Neonatal…

…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…

…Brugada syndrome. This disorder is easy to diagnose with a simple blood test and the ST segment elevations resolve after normalization of potassium levels. Brugada…

…which may be due to dysfunction in the conduction system. The J point and the ST segment The ST segment corresponds to the plateau phase…

…2. Sinus bradycardia, two premature ventricular contractions, incomplete right bundle branch block and ST segment depressions in V2 V6. Click to zoom. Figure 3. Sinus…

…pathway). This is associated with a delta wave. For further details on the PR interval and the PR segment, refer to The normal electrocardiogram (ECG).

…bridged segment may extend into diastole, so the physiological effect is not limited to systole. Exercise may amplify the abnormality through increased myocardial contractility and…

…Clinical context and patient selection Acute coronary syndrome ACS includes ST segment elevation myocardial infarction (STEMI), non ST elevation myocardial infarction (NSTEMI), and unstable angina…

…of patients, while clinically evident restenosis, manifested by recurrent angina attributable to the treated segment, occurred in 10–15% during the first year. The dominant…

…the treated segment. The clinical implications range from asymptomatic angiographic disease to chronic coronary syndrome (CCS), acute coronary syndrome (ACS), myocardial infarction, and repeat target…

…intervention: lesion preparation; selection of stent diameter and length; identification of the proximal and distal reference segments; assessment of stent expansion and apposition; recognition of…

…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…

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

…a more symmetrical T wave, a more distinct transition from ST segment to T wave and lower T wave amplitude. The T wave should be…

…ventricular hypertrophy, and to the left in left ventricular hypertrophy). ST T segment Significant hypertrophy may result in abnormal depolarization of the ventricular myocardium. This…

…Relapse of VF and new shock. ECG 12 . Sinus rhythm. ECG 13 . Ventricular tachycardia. ECG 14 . Sinus rhythm, with ST segment elevations not seen previously…

…Displacement of the ST segment is of fundamental importance, particularly in acute myocardial ischemia. Because myocardial ischemia affects a limited area and disturbs the cells…

…ST segment and inverted (asymmetric) T waves in the left sided leads. It is typical that the ST segment bulges upwards (Figure 1 and 2…

…symptoms Heart rate and blood pressure responses to exercise Detection of exercise induced arrhythmias Identification of exercise related ST segment changes Prognostic and risk stratification…

…and empagliflozin; sotagliflozin is a related dual SGLT1/SGLT2 inhibitor. SGLT2 is a high capacity, low affinity transporter situated in the S1 and S2 segments…

…in this layer results in a twisting (rotating) motion of the entire left ventricle. Basal segments rotate clockwise, and the apex rotates counterclockwise. This rotating…

…segment elevation myocardial infarction; extensive vascular calcification; female sex; low body mass index; larger arterial sheaths; greater intensity of procedural anticoagulation; complex coronary anatomy and…

…non ST segment elevation acute coronary syndrome (NSTE ACS) in patients with a low to intermediate likelihood of CAD when cardiac troponin and/or the…

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

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

…rate Rhythm P wave PR interval QRS complex ST segment T wave U wave QT (QTc) interval Pediatric and neonatal electrocardiograms differ markedly – in terms…

…a twisting motion of the entire ventricle. The basal segments are twisted clockwise, and the apex is twisted counterclockwise. The twisting contraction is called circumferential…

…mixed syndrome, with exertional angina and ST segment depression related to fixed disease, together with rest angina and ST segment elevation caused by spasm. The…

…NSTEMI and UA may be similar. NSTEMI is diagnosed when typical ischaemic symptoms occur without persistent ST segment elevation, accompanied by a rise and subsequent…

…sharp or stabbing. Its location and radiation may reflect the segment of aorta involved, although the source material does not provide a detailed symptom to…

…limited right ventricular dysfunction to severe right sided failure and cardiogenic shock. The haemodynamic disturbance results from impaired right ventricular contraction and reduced forward flow…

…non ST segment elevation acute coronary syndrome, stress testing may be considered after at least 24 hours of stabilization, provided that active ischaemia and haemodynamic…

…balanced and no ischemia occurs. (Some individuals display a benign form of ischemia located in the subendocardium during exercise; this manifests with ST segment depressions…

…For example, if there is acute ischemia located in the anterior wall and there is ST segment elevation in lead V3, then there should also…

…the ST segment and T wave are discordant with the QRS complex [7]. Specifically, T waves are inverted and ST segments are depressed in leads…

…approximately 20–50%. Their greater analytical sensitivity improves diagnostic accuracy and negative predictive value in patients with suspected acute coronary syndrome (ACS). Cardiac troponin is…

…situations, sinus arrest/pause should be considered abnormal, and the following differential diagnoses are at hand: Sinus node dysfunction. Side effects of drugs (diltiazem, verapamil…

…male patient, with similar ST segment changes, experienced syncopal episodes, ventricular tachycardia (including torsades des pointes), ventricular fibrillation arrests and moderate left ventricular dysfunction. This…

…concentration and new ST segment depression in new onset AF should not automatically be labelled type 2 myocardial infarction without further assessment. Clinical presentation and…

…rate) and also slows conduction over the atrioventricular (AV) node. The most classical ECG finding is generalized ST segment depressions with curved ST segment (generalized…

…heart rhythm and conduction Effect on sinoatrial (SA) node SA node function may become worse in patients with established SA node disease (sinus node dysfunction…

…ST segment elevation in leads V1–V2. All degrees of AV block. Sinus node dysfunction and tach brady syndrome. Ventricular tachycardia, ventricular fibrillation and torsade…

…wave, meaning that a positive delta wave will be followed by a negative ST T segment (typically with ST segment depression and T wave inversion)…

…left ventricular dysfunction, peripheral vascular disease and other manifestations of diffuse atherosclerosis. Percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) are revascularization procedures…

…display ST segment elevations during posterior (posterolateral) transmural ischemia. On the other hand, leads V1–V3 (occasionally V4) may detect the injury currents and present…

…T segment. Thus, the ST T segment is directed oppositely to the QRS (this is called discordant ST T segment ). Ventricular premature contractions and the…