Good question. With no simple answer. There are many triggers like caffeine, nicotine, alcohol, excess thyroid hormone, anxiety, stress, decongestants eg pseudoephedrine, direct stimulants eg cocaine, etc. But you also have to have potential electrical connections in your heart that you're born with or acquire eg from rheumatic fever.
See List. Stmulants Cocaine amphetamines meth caffeine idiopathic aberrant electrical track called WPW syndrome.
Yes. In susceptible people, yes - but not in everyone.
Caffeine. Overdose of caffeine can cause svt or atrial fibrillation.
Yes. Some people are sensitive to caffeine and can get svt/ atrial fibrillation from larger doses. Binge drinking of alcohol can precipitate atrial fibrillation in some people ("holiday heart").
Svt. Svt can cause the symptoms you describe.
Dr. Says I have supraventricular tachycardia, after ekg, and has ordered a 14 day event monitor and echo. Pulse irregular. Could anxiety cause this?
Anxiety. Anxiety can release certain chemicals that can cause tachy-arrhythmias, but other important issues need to be evaluated to assess your condition. Good luck with the 14 day monitoring process.
Yes. Yes, I see patients with it every day.
SVT. Supraventricular tachycardia will occur in about 1 out of every 250-300 people.