Supraventricular Tachycardias: How to Diagnose the Mechanism

  • Giulia Enea
  • Alessio Menditto
  • Francesca Patani
  • Francesca Troiano


Supraventricular tachycardias are a very common clinical condition. In this chapter, we analyze few supraventricular tachydardia 12-lead EKGs to discover their underlying mechanism.

At first, we have to observe the rhythm regular pattern. If regular, we have to check for P (or F) waves. If a P wave is visible, we have to assess the P/QRS ratio. When atrial activity is faster than the ventricular, we may consider the atrial flutter or atrial tachycardia hypothesis.

When P/QRS ratio is 1:1, we have to consider a possible reentrant circuit between atria and ventricles. Then, assessing RP and PR intervals, we can identify the mechanism of the tachycardia and make the correct diagnosis.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Giulia Enea
    • 1
  • Alessio Menditto
    • 1
  • Francesca Patani
    • 1
  • Francesca Troiano
    • 1
  1. 1.Clinica di Cardiologia e AritmologiaUniversità Politecnica delle MarcheAnconaItaly

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