I'm a 34 year old male and have been feeling this sensation over the past year and a half. It's random and lasts for a second or 2. I has an EKG and an Electrocardiogram done of my heart. Everything came back normal. I take Avapro. I'm 6 1 and weigh 184 lbs. I run about 10-12 miles per week. Is there anything to be concerned about?