What are ectopic beats? A concise explanation from leading London Cardiologist, Dr Boon Lim 

Thank you for this breakdown of the signals. I am familiar with the feeling of short little ectopics lasting maybe one of two beats. I’ve had them on and off for many years. Recently though I had two episodes, two months apart, of extended fluttering lasting about 4 or 5 seconds which caused me to lose blood to the brain, my vision went a bit dark, I got dizzy and went down to my knees but the recovered very quickly with a bit of heart racing for a couple of minutes afterward. I called 111 and they sent me to A&E but could not find anything on the ECG or blood work or basic exam. I have never fainted before so it was quite scary. What are your thoughts on potential causes of the extended ectopics. I do not drink or smoke or drink caffeinated beverages and I eat whole foods and am normal to bordering on underweight. Any thoughts would help me try to understand what happened and what I can do to prevent fainting. Thank you.

AMAZING THANK YOU DR BOON LIM. YOUR A LEGEND

Thank you for teaching me how to recognise Ectopic Beats - Different from baseline P-waves i.e ?more peaky: and then subsequent protracted QRS complex. Along with "skinny sequence" re: shortened depolarisations.

These PVCs have played havoc in my life had 4 ablations 2 of them by the good doctor here. Still getting them I’m very sorry to say.

Interesting explanation. However, it does not mention ways of preventing ectopic beats or how many ectopic beats are considered normal....

Why the QRS is inverted in ventricular ectopic beat