Atrial Multifocal Tachycardia

Atrial Multifocal Tachycardia: This is due to the presence of three more atrial ectopic foci of tachycardia. The P waves are, at the least three morphologies different frequency and higher than 100 beats / min. Other acute diseases that cause intracellular potassium leakage appear mainly in the elderly with pulmonary complications.


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  • 1 Etiology
  • 2 Diagnosis
  • 3 Treatment
  • 4 Possible complications
  • 5 See also
  • 6 Sources
  • 7 External Links


  1. Chronic lung diseases.
  2. Severe respiratory insufficiency.
  3. Pulmonary embolism.
  4. Theophylline poisoning.
  5. Decompensated diabetes mellitus.
  6. Digitalis poisoning.


The electrocardiographic diagnosis is established by:

  1. Presence of a succession of three different morphologies of P waves or more.
  2. Isoelectric line between the P waves.
  3. Absence of atrial dominant pacemaker, that is, absence of a defined base rhythm.
  4. Variability of PR, PP and RR intervals.
  5. Inequality of RR intervals, making differentiation with atrial fibrillation very difficult.
  6. The atrial frequency is variable and there are slow and fast rhythms of up to 200 L / mp. Usually it is higher than the ventricular rate, so there are P waves that are not conducted.



  1. Treat the cause of the underlying disease.
  2. Verapamil is useful for suppressing arrhythmia or reducing atrial or ventricular rate.
  3. Use B-blockers if they are not contraindicated.
  4. Class III antiarrhythmics (sotalol and amiodarone).
  5. Atrioventricular node ablation with permanent pacemaker implantation

in refractory cases.

Possible complications

  • Cardiomyopathy
  • Congestive heart failure
  • Reduced pumping action of the heart


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