Re: So many questions, so little relief

 I'll start with today; after reading about Taurine and L-Arginine, I've just taken my first tablets. There is some research data that suggests this can help palpitations. We'll see. I can only hope. Having had a very active, physical, perfect heart health experience for 55 years, the past 3 months have been hell. Palps all day, then they go away at night, and return in the morning.
Have done acupuncture, various herbs, supplements. It's likely I have a Mitral Valve Prolapse, and have had it for my entire life, but why, all of a sudden, I have become symptomatic, is not known. I must find the solution to this affliction.
I will also say that I can ride 20 miles on my mountain bike and not get one palp, but sit at work, and I get them all day, every few minutes.
Very unnerving...

Arginine is not a very good choice. Relatively high levels are needed to have real effect, and arginine activates herpes viruses. This is why lysine is used to treat cold sores and other herpes outbreaks, it is an arginine antagonist.

The most common reason for arrhythmias is cardiac irritability from decreased oxygen levels to the heart. The heart rhythm is regulated by nodes, which discharge electrical signals that cause contractions of the atria and ventricles. In a simplified explanation the sinoatrial (SA) node fires causing the atria to contract. This is the first thump we hear in a heart beat. Then the atrioventricular (AV) node fires causing the ventricles to contract. This is the second thump of a heart beat. Thus the thump (SA), thump (AV)........thump (SA), thump (AV)........ These nodes are sometimes referred to as pacemakers. Every cell in the heart can fire independently though, acting as pacemakers. If all fire randomly the heart actually goes in to a dangerous spasm (fibrillation). When isolated areas of the heart have cells trying to act as pacemakers the rhythm can be thrown off generally leading to nothing more than some discomfort. The problem starts with cardiac irritability from lack of oxygen to areas of the heart. This can be from blockage, constriction, or low pressure. The cardiac irritability leads to the formation of what are known as ectopic pacemakers (EP). This means cells of the heart trying to act as nodes. This leads to additional stimulation of the heart muscle, but the ectopic pacemaker causes the heart to fire out of sequence. Instead of the normal thump (SA), thump (AV)........thump (SA), thump (AV)........  we get something like thump (SA), thump (EP), thump (AV)........thump (SA), thump (EP), thump (AV)........ 

A few factors that can contribute are stimulants, stress, very low blood pressure, heart disease, and hormonal issues.

Based on your age and the fact that it has been sudden and consistent I would have to assume you are female? If so it could very likely be a hormonal issue. Estrogens can affect epinephrine, norepinephrine and serotonin levels, all which affect blood vessels.

Certain supplements can also trigger arrhythmias in some women. Evening primrose oil for example. Have you started on any new supplements or medications around the time these started?