…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 defects without any change in their QRS appearance. Such conduction delays may be due to myocardial fibrosis, amyloidosis, cardiomyopathy or hypertrophy. Prognosis of…

…Right dominant system is by far the most common anatomy, occurring in 90% of all individuals. Figure 2. Coronary arteries in a right dominant system…

…of acute coronary syndromes, particularly ST elevation myocardial infarction (STEMI), ischemic injury can disrupt the conduction system at any level, producing atrioventricular (AV) or intraventricular…

…and thus generate a negative (retrograde) P wave (Figure 2). Thus, the P wave morphology of premature atrial beats differs from the sinus P wave…

…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…