Multifocal Atrial Tachycardia
Multifocal atrial tachycardia is a rapid heart rate that occurs when too many signals (electrical impulses) are sent from the upper heart to the lower heart. The term multifocal atrial tachycardia is used when atrial impulses show at least three different P wave morphologies and a ventricular rate of 100 or greater. Multifocal atrial tachycardia is often a precursor of atrial fibrillation, and on physical examination may actually be confused with atrial fibrillation, since an irregularly irregular ventricular response is noted On the other hand, patients with similar atrial abnormalities but a slow ventricular rate (called multifocal atrial bradycardia) may require a pacemaker for indications similar to those with sinus bradycardia.
Multifocal Atrial Tachycardia is a rhythm characterized by varying P-wave morphology (by definition, three or more foci) and markedly irregular PP intervals. The rate is usually between 100 and 140 beats/min, and atrioventricular block is unusual. In multifocal atrial tachycardia (M.A.T.), multiple locations within the atria "fire" and initiate an electrical impulse. Most of these impulses are conducted to the ventricles, leading to a rapid heart rate, anywhere from 100 to 250 beats per minute. This very rapid rate greatly increases the heart's workload. Multifocal atrial tachycardia is typically seen in elderly patients with severe illnesses, most commonly COPD. The mechanism of the arrhythmia may be delayed afterdepolarizations leading to triggered activity, but this has not been firmly established.
Multifocal atrial tachycardia is often a precursor of atrial fibrillation, and on physical examination may actually be confused with atrial fibrillation, since an irregularly irregular ventricular response is noted. This very rapid rate greatly increases the heart's workload The treatment of this disorder is correction of the severe hypoxia when possible. This very rapid rate greatly increases the heart's workload.
Cause of Multifocal Atrial Tachycardia
Here are the list of the possible Cause of Multifocal Atrial Tachycardia:
Symptoms of Multifocal Atrial Tachycardia
Here is the list of some of the common sign and symptoms of Multifocal Atrial Tachycardia:
Additional symptoms that may be associated with this disease:
Treatment of Multifocal Atrial Tachycardia
Most patients have severe associated COPD. Treatment of the underlying condition is the most effective approach; verapamil, 240–480 mg daily in divided doses, is also of value in some patients. The initial treatment of multifocal atrial tachycardia should include supportive measures and aggressive reversal of precipitating causes. Since multifocal atrial tachycardia is commonly a secondary phenomenon, the role for antiarrhythmic therapy is unclear. Heart rate controlling medications, such as calcium channel blockers (verapamil, diltiazem) or selective beta-blockers, may be needed. Some useful treatment methods of Mycardiaultifocal Atrial Tachycardia:
Disclaimer : All information on www.healthatoz.info is for educational purposes only. It is not a substitute for professional medical advice. For specific medical advice, diagnoses, and treatment, please consult your doctor.