title: Preoperative Prevalence of J-Wave Syndrome Electrocardiographic Patterns and Their Association With Perioperative Cardiac Events.
abstract: OBJECTIVE
  To evaluate the preoperative prevalence of each type of J-wave syndrome electrocardiographic pattern and its association with perioperative cardiac events.
  
  
  METHODS
  Retrospective study.
  
  
  METHODS
  Single hospital university study.
  
  
  METHODS
  The study evaluated 930 patients who underwent gynecologic, abdominal, neurosurgical, orthopedic, and urologic surgeries.
  
  
  METHODS
  Preoperative standard 12-lead electrocardiogram (ECG) monitoring was performed, and each type of J-wave syndrome ECG pattern-types 1, 2, and 3 and Brugada syndrome-type-was evaluated. Incidence of perioperative cardiac events was investigated up to 1 year postoperatively using an electronic medical record system.
  
  
  RESULTS
  Data from 789 patients were included in the final study. Of these, 16 patients (2.0%) had J-wave syndrome: 7 patients (0.9%) had type-1 patterns; 5 patients (0.6%) had type-2 patterns; 2 patients (0.3%) had type-3 patterns; and 2 patients (0.3%) had Brugada syndrome-type ECG patterns. A J-point elevation≥0.2 mV, which is considered to be more dangerous, was found in only 2 patients with Brugada syndrome-type ECG patterns, both of whom suffered perioperative lethal arrhythmias.
  
  
  CONCLUSIONS
  Patients with J-wave syndrome ECG patterns, even dangerous patterns, are not necessarily associated with a higher risk of perioperative cardiac events. However, Brugada syndrome type ECG patterns should be carefully monitored.
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Fuyuta
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan. Electronic address: nakaos@med.kindai.ac.jp.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Nakao
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Kitaura
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Tatsushige
authors.initials: T
authors.lastname: Iwamoto
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Hamasaki
authors.affiliation: Department of Anesthesiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Shouhei
authors.initials: S
authors.lastname: Iwasaki
authors.affiliation: Division of Cardiology, Department of Internal Medicine, Kinki University Faculty of Medicine, Osaka, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kurita
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology*; D004562:Electrocardiography / Q000379:methods / Q000639:trends*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019990:Perioperative Care / Q000379:methods / Q000639:trends*; D015995:Prevalence; D012189:Retrospective Studies
keywords: Brugada syndrome; J wave; J-wave syndrome; early repolarization; early repolarization syndrome; electrocardiography