3.15 Ventricular Fibrillation Ventricular Fibrillation Mechanism: Rapid reentry? Faster focus? ECG characteristics: Nonhomogeneous oscillating ventricular complexes with no isoelectric axis Wave and tooth configuration Ventricular rate > 300 per minute
5.9 Brugada Syndrome Brugada Syndrome ECG characteristics: Etiology: Genetic defects with up to three mutations in SCN5A (sodium channel) with frequent familial occurrence of ventricular fibrillation ECG characteristics: Three types…
5.7 Dextrocardia Dextrocardia Mechanism: Right-sided location of the heart ECG characteristics: Low voltage Absent R formation in the precordial leads with rS configuration Nonspecific apical ventricular changes Etiology: Congenital Treatment:…
2.5 Depolarization of the Ventricles The depolarization of the ventricles is represented by a QRS complex and is indicated by a solid arrow (). Ventricular ectopics are represented by a…
2.2 Impulse Formation in the Sinus Node The formation of the electrical impulse in the sinus node is necessary to give rise to so-called sinus rhythm. Formation of an impulse…
5.5 Right Ventricular Hypertrophy Right Ventricular Hypertrophy Mechanism: Hypertrophy of the right ventricular musculature as a consequence of systolic or diastolic overload ECG characteristics: Often right axis P pulmonale (P…
5.3 Mitral Valve Prolapse Syndrome Mitral Valve Prolapse Syndrome Definition: Symptoms that are attributed to mitral valve anomaly or to neuroendocrine dysfunction, which cannot be solely explained by mitral valve…
2.3 Depolarization of the Atria (P Wave) The first electrical activity conspicuous in sinus rhythm is depolarization of the atria; a P wave occurs. The beginning of the P wave…
2.4 Conduction of the AV Node Following successful atrial depolarization, the electrical impulse is further conducted via the AV node, the bundle of His and the bundle branches. The individual…
2.1 Basic Concepts The conduction diagram represents a simplified projection of impulse conduction at the various anatomical levels of the heart on a time axis. Using typical ECG recordings a…
