A member asked:

Sometime i feel a big boom in my chest followed by a pause of 1-2sec then my heart beat fast and go back normal. what can cause this if heart tests ok?

A doctor has provided 1 answer
Dr. Daniel Ziegler answered

Specializes in Emergency Medicine

PVC: The heart has a pacemaker (PM) or internal clock in the upper chambers (atria) that sends a signal to the lower chambers (ventricles) which is delayed so that the ventricles contract after the atria. Premature ventricular contractions (PVCs) can occur spontaneously or be triggered by adrenaline or drugs and are always followed by a compensatory pause to return the heart to its previous rhythm.

Answered 10/11/2018

2.7k views

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