Longer duration of electrocardiographic monitoring after cryptogenic stroke is associated with a greater detection of AF .
BACKGROUND Atrial fibrillation ( AF ) is a major cause of stroke .
Although st and ard investigations after an event include electrocardiographic monitoring , the optimal duration to detect AF is unclear .
We performed a systematic review and meta- analysis to determine whether the duration of electrocardiographic monitoring after an ischemic event is related to the detection of AF .
Age-dependent yield of screening for undetected atrial fibrillation in stroke patients: the Find-AF study
Diagnosis of paroxysmal atrial fibrillation ( AF ) in stroke patients is challenging , but highly clinical ly relevant . The percentage of stroke patients with permanent AF  increases with age , but limited data are available for the age-dependent yield of paroxysmal AF by Holter monitoring . Patients with acute cerebral ischemia were included into the prospect i ve observational Find-AF study . Patients free from AF at presentation received 7 day Holter monitoring .  We calculated the percentage of otherwise undetected paroxysmal AF and the number needed to screen for age groups under 60 years , and in 5 year clusters from the age of 60 up to 85 and older . 272 patients were included , 43 ( 15.8 % ) had AF at admission , 33 patients with paroxysmal AF were identified by 7 day Holter ( n = 29 ) or medical history ( n = 4).The yield of 7 day Holter ECG  clearly increased with older age ( p = 0.004 ) : < 60 years : 5 % , 60–64 years : 5 % , 65–69 years : 7 % , 70–74 years : 11 % , 75–79 years : 13 % , 80–84 years : 25 % , ≥85 years : 39 % . The number needed to screen ( NNS ) to find one patient with paroxysmal AF decreased with age : ≤60 years : 18 , 60–64 years : 20 , 65–69 years : 14 , 70–74 years : 9 , 75–79 years : 8 , 80–84 years : 4 , ≥85 years : 3 , respectively . In patients < 65 years , all AF cases were detected by Holter ECG . The percentage of paroxysmal AF in stroke patients increases with age . The  7 day Holter ECG  is most efficient in elderly patients
Longer duration of electrocardiographic monitoring after cryptogenic stroke is associated with a greater detection of AF .
BACKGROUND Atrial fibrillation ( AF ) is a major cause of stroke .
Although st and ard investigations after an event include electrocardiographic monitoring , the optimal duration to detect AF is unclear .
We performed a systematic review and meta- analysis to determine whether the duration of electrocardiographic monitoring after an ischemic event is related to the detection of AF .