My heart has been frequently what I call skipping beats . There will be a regular rhythm, then a pause, then a noticeably hard beat followed by a pounding regular beat. Sometimes this will happen every second, third or fourth beat. I particularly feel it while lying in bed before going to sleep and upon waking. I can do cardio exercise without pain or sob, and seldom notice this skipped beat phenomenon during exercise. I have been having episodes of light headedness or mild dizziness, but doesn t seem to be coincident with the skipped beat episodes. Would appreciate your opinion regarding these symptoms. Thank you.