I'm 25. My Heart stopped unexpectedly last year. They where unable to figure out why. They installed and (ICD) exactly a year and a day later (yesterday) it went off because my heart was racing. I have no idea if it was ventricular tachycardia or not. I was put on IC Metoprolol Tarta. I was wondering if there were any side effect besides dizziness. I was also wondering if these slight sensations with my heart and chest are due to the shock yesterday or the medicine, or both. Also the (ICD) went of more specifically because the top two chambers of my heart were beating faster them the lower two.

Summarized question: What are the symptoms of ventricular tachycardia?