Premature supraventricular complexes are beats that represent premature activation of the atria by a focus other than the sinus node.

Electrocardiographic Criteria

Premature atrial complex

  • Ectopic beat of atrial origin with P waves that are premature relative to the baseline cycle and whose morphology differs from the sinus P wave
  • Premature atrial complexes may occur with aberrant conduction, or may even be blocked (nonconducted)

Premature junctional complex

  • Early ectopic beat originating in the AV node
  • There are three possible electrocardiographic presentations: a negative P wave in the inferior leads with a short PR interval; no atrial activity before the QRS (P wave buried within the QRS); or a negative P wave in the inferior leads after the QRS complex

ECG in Premature Supraventricular Complexes

Coming soon…

References

  1. Scheffer MK, De Marchi MFN, de Alencar Neto JN, Felicioni SP. Eletrocardiograma de A a Z. São Paulo: Manole, 2024.
  2. Manolis AS. Supraventricular premature beats. Uptodate. 2023.
  3. Samesima N, God EG, Kruse JCL, Leal MG, et al. Diretriz da Sociedade Brasileira de Cardiologia sobre a Análise e Emissão de Laudos Eletrocardiográficos – 2022. Arq Bras Cardiol. 2022;93(3 Suppl 2):2–19.