I'm a 73 yr old WM with an excellent heart history and heritage, a perfectly normal recent EKG, non-smoker, no asthma, quite fit, normal weight. About 10 wks ago,I started having tachycardia episodes between 4AM and 6AM. The episodes range from zero to six per night. I've had slightly elevated blood pressure (in the 145/85 range) for the last year and have been taking Metoprolol for the last six wks with some benefit blood-pressure-wise (now 137/70). Episodes in last five nights have been increasing in frequency to average five. They wake me up but only seem to last 8 to 35 seconds (mostly, I'd guess, around 12 seconds).I'm guessing my pulse rate goes up to around 140 bpm. Daytimes, I feel and act just fine. I've been under a little stress lately, but nothing really abnormal. My GP doesn't seem concerned beyond tracking my blood pressure and prescribing the Metoprolol. Should I try to see a specialist?