Once every couple of weeks my heart starts beating rapidly & I feel dizzy for a couple of minutes, then it goes away. I am a female, 40 years old. I was pregnant with twins at age 37 & experienced the same symptoms, but more often & the episodes would last about 15-20 minutes. My OBGYN told me that this was normal. Approx 2 weeks after I gave birth, it happened again, but for about 3 hours until I went to the e/r. The e/r Dr. told me that I had water in my lungs & I believe ventricular tachycardia (I think), but told me probably due to my high risk pregnancy. I followed up with a cardiologist who also agreed with the e/r dr.