Accelerated Idioventricular Rhythm - Symptom, Causes, Treatment

Accelerated idioventricular rhythm is a form of ectopic or automatic ventricular arrhythmia. AIVR is characterized by a ventricular rate that is slower than traditionally defined ventricular tachycardia. It is found most commonly in the presence of underlying heart disease. AIVR appears similar to ventricular tachycardia but is benign and doesn't need any treatment. AIVR arises from subordinate or second-order pacemakers and manifests itself when the patient's prevailing sinus rate becomes lower than the accelerated rate of the otherwise suppressed focus. Accelerated idioventricular rhythm is an electrocardiographic diagnosis and does not generally produce any particular symptoms. Making a correct diagnosis remains one of the most important concerns because the usual treatments for patients with the more common form of ventricular arrhythmia, such as VT, may not apply.

Cause of Accelerated idioventricular rhythm

Some causes of Accelerated idioventricular rhythm:

• Drugs (eg, digoxin).
• Outpatient procedures (due to spinal anesthesia).
• Possibly during resuscitation.
• Heart disease (eg, acute myocardial infarction, digitalis toxicity, at reperfusion of a previously occluded coronary artery).

Treatment of Accelerated idioventricular rhythm

Some most common treatmet of Accelerated idioventricular rhythm:

• AV dissociation results in loss of sequential AV contraction and hemodynamic benefits of atrial contribution to ventricular filling.
• AIVR begins with a premature ventricular complex that has a short coupling interval and causes discharge in the vulnerable period of the preceding T wave.
• If the patient develops more complex or recurrent ventricular arrhythmias, EPS may be required. Cardiac EPS allows physicians to locate abnormal sites inside the heart that may be causing serious arrhythmias.

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