…Components of the ventricular conduction system and the temporal association between the ECG and impulse transmission through the heart. An intraventricular conduction delay may occur…

…Intraventricular conduction delay in a standard 12 lead electrocardiogram as a predictor of mortality in the general population. Circ Arrhythm Electrophysiol 2011;4:704–710…

…are common in myocardial ischemia and infarction. These conditions may be seen as signs of ischemia, which is why one must be familiar with them…

…50 beats per minute in the first 4 to 6 hours after an acute infarction—patients may develop hypotension and signs of end organ hypoperfusion…

…originates in the atria it will pass through the bundle of His and therefore produce a normal QRS complex (provided that intraventricular conduction is normal)…

…provided that intraventricular conduction is normal). If the P wave is visible, it is retrograde in lead II (because of the reversed direction of atrial…

…atrial fibrillation) if the block in the AV node is high grade. Causes of tachyarrhythmia with narrow QRS complexes (QRS duration < 0.12 s…

…high suspicion of intermittent infrahisian block should be maintained, particularly in older patients and those exhibiting a bundle branch block (BBB) or an intraventricular conduction…

ECG Hypertrophy and dilatation Principles of atrial and ventricular enlargement (hypertrophy and dilatation) Cardiac chamber enlargement refers to abnormally large atria or abnormally large ventricles…

…clinical relevance and it may lead to misunderstanding. Use of the term PSVT is therefore not recommended. Synonyms for AVNRT Atrioventricular nodal reentrant tachycardia Atrioventricular…

…These cells are capable of spontaneous depolarization (i.e they display automaticity) and can therefore act as latent pacemakers (which become active when atrial impulses…

…reduced intraventricular pressure and thereby reduced myoardial load. Pulmonary embolism causes increased right ventricular load, which results in increased oxygen demand and dilatation of the…

…across the valve (ΔP) from right intraventricular pressure. The systolic PA pressure is an indicator of cardiac hemodynamic status and may be estimated with…

…a longer resting period is advised. 4. Which of the following describes a 'Black athlete repolarization variant' considered a normal ECG finding? A: T wave…

…life threatening clinical syndrome in which increased intrapericardial pressure compresses the heart and impairs ventricular filling. It generally results from accumulation of pericardial fluid, blood…

…fascicle. Approximately 5–10% of all individuals have a third fascicle – the median or centroseptal fascicle – which gives off Purkinje fibers to the interventricular septum…

…thickness of the interventricular septum (B) and the inferolateral wall (A) have also been measured. The image sector is created using sequential activation of the…

…congestion may be important mechanisms. Diuretics relieve the hemodynamic consequences of congestion by producing a negative sodium and water balance. They can reduce jugular venous…

…interventricular septum, or mitral valve apparatus. These lesions can cause acute severe regurgitation, a left to right shunt, tamponade, or sudden loss of effective cardiac…

ECG Introduction to ECG interpretation The QRS complex (ventricular complex): normal and abnormal configurations and intervals A complete QRS complex consists of a Q , R…

…Left anterior descending coronary artery (LAD) The LAD supplies the anterior two thirds of the interventricular septum (this area is referred to as anteroseptal area )…