title: False tendons may be associated with the genesis of J-waves: prospective study in young healthy male.
abstract: BACKGROUND
  Recent studies showed that J-waves are associated with vulnerability to ventricular fibrillation. Recently we reported the association between false tendons (FTs) and J-waves in a retrospective study.
  
  
  RESULTS
  We prospectively studied 50 young healthy men (mean age 24.6±2.7 years). FTs were detected echocardiographically and classified based on their points of attachment as type 1 (longitudinal type), type 2 (diagonal type), and type 3 (transverse type). J-waves were defined as terminal QRS notching or slurring with ≥0.1 mV. The filtered QRS duration (fQRSd), RMS40, and LAS40 were measured on signal-averaged ECGs. FTs were detected in 37 of the 50 subjects (74%). The incidence of J-waves was significantly higher in subjects with type 1 or type 2 FTs than those with no- or type 3 FTs (61% vs. 26%, p<0.05). The leads with J-waves were closely associated with the location of the FT. While no late potential was recorded in any study subjects, fQRSd and LAS40 were significantly longer in subjects with type 1 or type 2 FTs (p<0.05). Univariate and multivariate logistic regression analysis revealed that only the existence of FTs (type 1 or 2) was an independent predictor of the presence of J-waves.
  
  
  CONCLUSIONS
  Our results suggest that FTs were related to the genesis of J-waves with conduction delay.
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan. Electronic address: mikinak@oita-u.ac.jp.
authors: Mikiko
authors: M
authors: Nakagawa
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Kaori
authors: K
authors: Ezaki
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Hiroko
authors: H
authors: Miyazaki
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Yuki
authors: Y
authors: Ebata
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Tetsuji
authors: T
authors: Shinohara
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Yasushi
authors: Y
authors: Teshima
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Kunio
authors: K
authors: Yufu
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Naohiko
authors: N
authors: Takahashi
authors: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita 879-5593, Japan.
authors: Tetsunori
authors: T
authors: Saikawa
mesh_terms: D001145:Arrhythmias, Cardiac / Q000209:etiology / Q000503:physiopathology*; D004452:Echocardiography; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000002:abnormalities*; D006801:Humans; D008297:Male; D011446:Prospective Studies; D055815:Young Adult
keywords: Echocardiogram; Electrocardiogram; False tendon; J-wave