Two young males who had no @entity299 died unexpectedly during the night. In one @entity1 , the monitor ECG showed a @entity9765 and the electrophysiologic study revealed a sinoatrial conduction time at the upper limit of normal and a prolonged PA interval. The surface ECG showed @entity2270 . @entity1540 were confined to the night when he died from @entity5069 . The ECG of the other @entity1 was normal except for the change in QRS configuration found when the preceding RR interval was prolonged, suggesting a phase 4 block in intraventricular conduction. He was completely free from @entity943 except for the @entity1540 which developed around 9:00 p.m. and the @entity5069 following an R-on-T type @entity1540 which resulted in death during the night. The autopsy showed no @entity299 . ST elevation suggestive of acute @entity63 was not found and the QT intervals were normal in both cases. No electrolyte imbalances were found. These 2 cases can be diagnosed as pokkuri disease which is well known in Japan. The victims are exclusively young males who have no apparent diseases to which death can be attributed.

Sudden nocturnal death in young males from XXXX .

@entity1 :: ('9606', 'Species') :: ['patient'] @entity63 :: ('MESH:D007511', 'Disease') :: ['ischemia'] @entity9765 :: ('MESH:D012848', 'Disease') :: ['sinoatrial block'] @entity1540 :: ('MESH:D018879', 'Disease') :: ['Ventricular ectopic beats', 'ventricular ectopic beat', 'ventricular ectopic beats'] @entity299 :: ('MESH:D006331', 'Disease') :: ['organic heart disease'] @entity2270 :: ('MESH:C566610', 'Disease') :: ['left axis deviation'] @entity943 :: ('MESH:D001145', 'Disease') :: ['arrhythmia'] @entity5069 :: ('MESH:D054141', 'Disease') :: ['ventricular flutter']
@entity5069 :: (MESH:D054141,Disease) :: ['ventricular flutter']
