WebJul 1, 2002 · Torsade de pointes (TdP) is a form of polymorphic ventricular proarrhythmia associated with QT interval prolongation and the presence of prominent U waves on the resting electrocardiogram (ECG). These ECG changes represent prolonged repolarisation and the development of early after depolarisation (EAD). WebJan 10, 2014 · However, arrhythmias are often connected to special excitations of cardiac cells, called early afterdepolarizations (EADs), which are depolarizations during the repolarizing phase of the action potential. So far, EADs have been studied mainly in …
Mechanisms of Cardiac Arrhythmia Thoracic Key
WebThese insights provided the scientific basis for a landmark classification of antiarrhythmic drugs based on the actions of these drugs on cardiac action potential (AP) components and their relationship to arrhythmias. 1, 2 … WebFeb 15, 2024 · Cardiac arrhythmias are associated with high morbidity and mortality worldwide. 1 This is due, at least in part, to gaps in the knowledge of the basic mechanisms that may have negative impacts on the effectiveness of therapeutic interventions. Accumulating data from experimental and clinical studies strongly indicate that … himg podiatry huntington wv
Early Afterdepolarizations, U Waves, and Torsades de Pointes
WebJun 30, 2024 · Atrial tachycardia (AT) is a regular atrial rhythm at a constant rate of >100 beats per minute originating outside of the sinus node . Focal ATs (also referred to as … WebThese aberrant depolarizations are often the result of myocardial remodeling and frequently originate within the muscular sleeves that extend into the pulmonary veins from the atria. Causes include hypertension, valvular and ischemic heart disease, and genetics (e.g., mutation of 10q22 – q24 on chromosome 10). WebB, Example of recurrence of AF. Termination of AF leads to a remarkable increase in developed tension. A premature extrasystole, appearing after third sinus beat, reinduces arrhythmia. C, Example of late phase 3 EAD … home improvement tool meme