The impact of repeated short episodes of circulatory arrest on cerebral function. Reassuring electroencephalographic (EEG) findings during defibrillation threshold testing at defibrillator implantation

2015 HRS/EHRA/APHRS/SOLAECE expert consensus statement on optimal implantable cardioverter-defibrillator programming and testing

“…III (Harm) C-LD AAD ¼antiarrhythmic drug; ARVC ¼arrhythmogenic right ventricular cardiomyopathy; CAD¼ cpronary heart disease; HOCM¼ hypertrophic obstructive cardiomyopathy; ICU ¼intensive care unit; OAC ¼ oral anticoagulant slightly longer time to the return of middle cerebral blood flow [197][198][199]. However, the clinical relevance of this transient finding is unclear because DT does not appear to cause cognitive dysfunction 24-48 hours following ICD implantation [200,201].…”

2015 HRS/EHRA/APHRS/SOLAECE expert consensus statement on optimal implantable cardioverter‐defibrillator programming and testing

“…Transient central nervous system hypoperfusion and cerebral ischemic changes can be demonstrated during intraoperative electroencephalographic (EEG) monitoring at the time of DT. However, EEG recovery occurs within less than 30 seconds, with a slightly longer time to the return of middle cerebral blood flow [197] , [198] , [199] . However, the clinical relevance of this transient finding is unclear because DT does not appear to cause cognitive dysfunction 24–48 hours following ICD implantation [200] , [201] .…”

Changes in the heartbeat-evoked potential under ventricular fibrillation: a near-death case report

“…The predominance of slow waves in EEG is associated with an ongoing ischemia, i.e., reduced oxygenation in the brain [7][8][9] . The slowing in EEG oscillations has been reported in intermittent circulatory arrest 10 , and in patients surviving a cardiac arrest 11 . The brain-heart interactions under ventricular tachycardia, and developing ventricular fibrillation, have not been described before in humans.…”