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Premature ventricular contractions

Although my heart was mostly steady and regular, I still counted about 6 skips. I have been told those are premature ventricular contractions, PVC or extrasystole, which are wrongful electrical signals originating from the heart’s lower chambers/ventricles, opposing the signals normally originating from the sinus of the upper chamber/atrium. Perhaps due to extra adrenaline brought on by constant daily cardio training, or even caffeine. So far, no trouble other than the feeling of a skipped beat, followed by a harder contraction inside the chest. No major discomfort.