Dear friend, welcome to HCM. skipping heart beats and associated dizziness and sickness is definitely alarming and suggests a cardiogenic presyncope. Do you actually fall down or unconscious during the period transiently? This passing out with missed beats should be urgently evaluated by a physician for a possible arrhythmia - a heart rhythm abnormality. some of them can be fatal ! So, take care and get evaluated by physical exam and an EKG. If an arrhythmia is not caught on the EKG, may do an EKG when you sense that it is coming on. may need blood tests as well as per findings. A holter device does continuous evaluation of EKG for intermittent arrhythmia. wish you have none ! Still, concerned and will await your follow up. pl. keep me posted . Also please rate this answer if you feel you are helped out well. Thanks and Good Luck!