My father had a heart attack about 2 and a
half years ago but recovered reasonably quickly. However, in the months afterwards he had several brief blackouts which we later discovered were occurrences of his heart stopping briefly for a few seconds or less. Initially the hospital had no idea that his heart was actually stopping because even though he blacked out, by the time he arrived at the hospital all of his medical results showed as fine - his blood pressure, his ECG, etc..