Dear patient, Palpitations ( abnormal perception of one s own heart beat) are a dangerous sign and needs to be investigated. First and foremost, one needs to check if they are 1. Intermittent or persistent 2. Regular or irregular 3. Aggravated by physical exertion or relieved by rest. 4. you also need to narrow down to heart only after ruling out thyroid disorders or severe anemia The symptoms of light headedness occur because when your heart beats rapidly it is not able to supply adequate blood to your brain and this is percieved as giddiness or can even cause transient loss of consciousness. I would strongly recommend you for an urgent ECG and a 2 D Echo followed by a physician consult. Remember, in medicine there are certain subtle signs which if picked up at the right moment can prevent a major catastrophic illness. Feel free to ask any queries or further plan after your investigations Thanks