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What causes heart palpitations and are they fatal

Health related question in topics Palpitations .We found some answers as below for this question “What causes heart palpitations and are they fatal”,you can compare them.

A:Palpitations result from abnormal heart rhythms called arrhythmias, heartbeats that are too slow, too rapid, irregular, or early. [ Source: http://www.chacha.com/question/what-causes-heart-palpitations-and-are-they-fatal ]
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What causes heart palpitations and are they fatal
Palpitations result from abnormal heart rhythms called arrhythmias, heartbeats that are too slow, too rapid, irregular, or early.

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Heart problems..?
Q: I’m 22 and started having this about 2 years ago. My heart suddenly feels like it’s pausing for 1 second, then starts again with a strong thud. Right at that moment it feels like 2 strong beats that are occuring simultaneously. It’s brief but uncomfortable. It makes me think I have heart problems. I alos get frequent palpitations, despite the fact that i don’t use coffee. I had a scary PSVT attack when i was 18, they don’t know what caused it, they said i was ok. When i have EKG it never shows anything. I’ve even done the Holter monitor for 24 hours, nothing unusual. What other tests can I have? Anyone else with a similar problem? It worries me because I hear of seemingly healthy young people suddenly collapsing and turning out to have fatal heart conditions..
A: I wouldn’t worry about falling over dead. An EKG will show abnormalities such as Hypertrophic Obstructive Cardiomyopathy (HOCM) and would also show any arrhythmias that were present at the time. I’m not sure what your cardiologist told you, but you may have had short bouts of atrial fibrilation (A Fib), or thrown a few random premature ventricular contractions (PVCs.) I am an echo tech myself (meaning that I conduct cardiac ultrasounds) and I can tell you from experience that if your doctor felt there was any need for an echo, he would not hesitate to order one. I’m sure he saw something minor that was causing your symptoms, and felt no need to bring it up because he did not intend to treat it. Also, respiratory variation (changes in breathing) influences your heart rhythms and blood flow profiles. (Look up valsalva maneuver.) If your symptoms persist, I would ask your doctor for an echo simply for peace of mind. It would confirm or deny the presence of any valvular stenosis (blockage) or regurgitation (leaking), any VSD/ASD (hole in the walls between the lower or upper chambers of the heart), valvular prolapse/redundancy (long valve leaflets that snap open and shut), presence of tumors or clots, evidence of infarction, doppler velocities and volume measurements of bloodflow, and would rule out other visible physical defects. I also would tell your doctor that you may feel acute anxiety over this and he may prescribe some sort of anti-anxiety medication like alprazolam, or something. Good luck.
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