Recipient Atrial Fibrillation Manifesting as an Irregular Monomorphic Atrial Tachycardia in the Donor Heart.

A 63-year-old man presented with a 1-year history of atrial tachycardia (AT) 6 years after orthotopic heart transplantation with bicaval anastomosis. Twelve-lead electrocardiogram showed monomorphic AT with isoelectric intervals across all leads and strikingly irregular PP intervals. At electrophysiology study, the native left atrium's rhythm was atrial fibrillation (AF) while the donor atria exhibited centrifugal activation of irregular cycle length originating from a site along the left atrial anastomosis.

Detection of paroxysmal atrial fibrillation by prolonged electrocardiographic recording after ischaemic stroke in patients aged<60years: a study with 21-day recording using the SpiderFlash(®) monitor.

Background: Many studies have suggested that longer duration of cardiac monitoring is suitable for the detection of occult paroxysmal atrial fibrillation (AF) after stroke; however, most studies involved patients aged≥65years - a population with a high stroke rate.

Aims: To assess the incidence of paroxysmal AF in unselected young patients presenting with stroke.

Methods: We included consecutive patients aged<60years with a stroke diagnosis on magnetic resonance imaging.