Does anyone have nighttime palpitations during sleep or sudden onset of rapid heart beats? The symptoms are driving me crazy and any advice is greatly appreciated.
I'm 28 years old female. Since young, I have elevated heart rate (normally above 100 bpm, but not too high, during daytime no matter what I'm doing and my heart rate would go up easily with slight exercise, but it would gradually go down as night approaches and completely normal during my sleep). Although I have this issue, it never really bothered me and I didn't feel any symptoms or discomfort.
My doctor was concerned about my elevated heart rate and recommended me to consult a cardiologist. So about two years ago, I started to visit cardiologists, went through various heart checks including blood tests, electrocardiograms, echocardiogram, 24-hr Hotler, treadmill test, and one month Holter. Everything showed normal, just showing I have elevated heart rates at random times. So my cardiologist diagnosed me as Inappropriate Sinus Tachycardia (IST) and I started taking low dosage beta blockers to control my heart rate.
In the first year after I start taking beta blocker, I felt great. My heart rate did went down and I felt more comfortable than before. However, after the first year, I started to have sudden onset of tachycardia that happens at random times, with a lot of them happen during nighttime when I'm sleeping. For example, I would suddenly wake up from my sleep finding my heart pounding, mostly around 120 bpm - 130 bpm, but sometimes would go up to 140 bpm to 160 bpm (the highest is 175 bpm). It also accompanies with icy and wet hands and feet, sometimes dizziness, numb hands, weakness, nausea, and spasms. It normally lasts about 3-5 minutes and my heart rate then gradually goes down (occasionally I would have 2nd onset after about 10-20 minutes of returning to normal heart rates). The Holter captured it few times and showing as sinus rhyme (so I guess it's not dangerous).
When it happens during my sleep, it really disrupts my sleep as I find myself hard to fall back to sleep again. Sometimes it happens multiple times per night and my sleep is basically trashed and I'll find myself as a zombie the next day. Actually I find myself as a zombie 30% of the time since I have the symptoms about 10 days per month every month. I've talked to my cardiologist about this and I experimented different beta blockers but none works well. My cardiologist has no clue how to fix my problem and can only guarantee me that it's not a dangerous condition and I won't die from it.
But I do feel like dying every time I woke up from my sleep with crazy heart beats and other symptoms. I'm increasingly depressed because I'm not getting good sleep. I'm getting enough of enjoying my good time then the symptoms suddenly attack and ruins my good day.
I don't know how I went through all of these in the past year and I'm getting enough of it. Does anyone have similar issues, know a way to fix it, or know how to cope with it? Any advice is deeply appreciated!!