Why do I have sudden fast and pounding heartbeats?

I have really intense heartbeats. Sometimes I can hear and feel them in my neck and ears and at times, I can SEE them in my chest: I'll have a book resting on my chest and all of a sudden it'll start to jump slightly. I can see my chest beating a lot...

Ok, this is a very confusing issue for me. Lately I have been getting these very short pounding headaches that last for about 5 seconds or so. The pounding feels almost like the pulse of blood in the front of my head if that makes sense. It is usually...

I have been having a pounding headache off and on for a month or so now. It is especially bad right now, out of nowhere. I only drink caffeine soda, and I quit drinking coffee a while back. I can hear the blood pumping sometimes in my ears, or feel it...

Every couple of days at random times i feel 2 rapid heartbeats that make me cough right after. It doesnt happen very often maybe once every week. Ive gone to the doctor for this and they made me wear a machine that monitors my heartbeats for a day and...

I have been working on a project for a physiology class for a while now. It has to do with heart disease. I am testing men between 18 and 60. The tests involve taking vitals, an ekg and extensive auscultation of the heart for murmurs, splits, gallops...

This only for Girls, Do any Girls out there Have an Interest in heartbeats and like listening to heartbeats and feel heartbeats and asking people how fast is your heartbeating, hope to hear from you soon. this is only for girls. :)

I never had any kind of problems with headaches or pounding in my ears until about 1 yr ago. At this time i noticed black and brown mold growing on my walls in my bedroom and bathroom, which i believe to be lack of ventalation. Ive been to the family...

So I had a weird dream the other night lol. And my heart was pounding when I woke up. My heart was pounding so bad that it caused me to wake up. My chest was in moderate pain when I woke up because my heart was pounding so bad. As my heart rate slowed...

The slow pounding heart isn't just all. I'm nearly 16 and I'm pretty average sized, maybe smaller. I'm not really fit seeing as I do not exercise at all. I just have a really good metabolism. I've been having a random pains in my left rib under my breast...