Hello and thank you for using HCM.I carefully read your question and I understand your concern.You shoud not worry. This skipped beat has to with a rhythm issue. There are some electrical impulses that generates from different parts of the heart different from normal sinus rhythm.They cause a premature heart contaction that its not a normal one followed by a pause and than a normal heart contraction.This are what we call extra sistolic beats. There are different causes of extrasistoles to simple emotional stress, coffee and alcohol consumption. Also pathologys like anemia , hyperthyroidism,hormonal changes or ischemic heart disease might be other causes. Extra sistolic beats give you such symptoms like palpitation, anxiety, difficulties in breathing deeply. If you are passing through a streesed period these extrasistoles are quite normal.Soon they will pass so you have nothing to worry about. Only if they begin to interfere your normal life I would recomend some examination like an electrocardiogram , a cardiac echo to evaluate heart function, a full blood analyze, your thyroid hormones and a holter rhythm monitoring to see the frequency of extra beats. Hope I was helpful.Wish you good health. Best regards