Hi, I'm 17 years old and have recently had the feeling of my heart stopping for 3-4 seconds at night. This sensation comes with dizziness, a feeling of impending doom, and a feeling like I'm falling. I get a surge of adrenaline that feels like it restarts my heart. Although I get the surge of adrenaline followed by extreme nervousness and what feels like I'm dying, my heart does not start beating fast, but feels as if it slowly restarts and stays slow. I was hospitalized and diagnosed with autonomic dysfuntion when I was 14 when my heart started beating extremely fast for no apparent reason, but this feeling is nothing like what I've dealt with before (tachycardia). I was wondering if anyone has felt this way before or has any information on it.