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Amiodarone is an effective, antiarrhythmic-of-choice in achieving cardioversion to sinus rhythm in critical care populations with new onset atrial fibrillation (NOAF). However, other anti-arrhythmic agents may exert superior rhythm control, rate control and lower mortality rate which may be more favourable than amiodarone in specific cases. [32]
Amiodarone is also safe to use in individuals with cardiomyopathy and atrial fibrillation, to maintain normal sinus rhythm. Amiodarone prolongation of the action potential is uniform over a wide range of heart rates, so this drug does not have reverse use-dependent action. Amiodarone was the first agent described in this class. [4]
(The re-entrant rhythm is less likely to interact with tissue that has become refractory). The class III agents exhibit reverse-use dependence (their potency increases with slower heart rates, and therefore improves maintenance of sinus rhythm). Inhibiting potassium channels results in slowed atrial-ventricular myocyte repolarization.
Following electrical cardioversion, the cardiologist will determine if sinus rhythm has been restored. To confirm sinus rhythm, a distinct P wave should be seen preceding each QRS complex. Additionally, each R-R interval should be evenly spaced. If sinus rhythm is restored, the pads may be disconnected, and any other medical equipment is ...
AV-nodal reentrant tachycardia (AVNRT) is a type of abnormal fast heart rhythm. It is a type of supraventricular tachycardia (SVT), meaning that it originates from a location within the heart above the bundle of His. AV nodal reentrant tachycardia is the most common regular supraventricular tachycardia.
Amiodarone to control the rhythm, electrical cardioversion is not used. Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node . [ 1 ] It can be contrasted to atrial tachycardia .
Sinus tachycardia is a normal response to physical exercise or other stress, when the heart rate increases to meet the body's higher demand for energy and oxygen, but sinus tachycardia can also be caused by a health problem. [4] An elite athlete's heart recorded during a maximum effort workout maintaining over 180 bpm for 10 minutes.
Inappropriate sinus tachycardia is a diagnosis of exclusion that is rarely made in an asymptomatic patient. [2] The following criteria are commonly used to define inappropriate sinus tachycardia: [10] The axis and morphology of the P wave during tachycardia similar to or identical to that experienced during sinus rhythm