What does it mean when your heart starts beating really fast(over 160bpm), short of breath like someone is pushing on my chest, and dizzy?  This was while I was at home, not doing any activities just walking around the house, bent down to pet the dog and it started when I stood up.
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, we should first rule out arrhythmia (rhythm disturbances in heart) like atrial fibrillation (AF), atrial flutter, supra ventricular tachycardia (SVT) etc. All these can cause rapid heart rate, dizziness, chest tightness and discomfort. So get done ECG, 2d echo and Holder monitoring (24 hour continuous monitoring of ECG) to rule out arrhythmia. On the basis of reports, you may need anti arrhythmia Chat Doctor.  Don't worry, you will be alright. First diagnose yourself and then start appropriate treatment. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.