Incidence and Characteristics of Ventricular Fibrillation in Bystander-witnessed Out-of-hospital Cardiac Arrest with Cardiac Etiology in the City of Sendai, Japan

Jun Watanabe; Masaharu Kanazawa; Tetsuo Yagi; Hironori Odakura; Motonobu Kameyama; Katsuhiko Sakurai; Tetsuya Hiramoto; Hiroshi Uenohara; Tomoyuki Endo; Yoshito Koseki; Tsuyoshi Shinozaki; Nobuyuki Shiba; Akihiko Karibe; Masahito Sakuma; Koji Fukuda; Yutaka Kagaya; Katsunori Numakura; Masayuki Yamaki; Yotaro Shinozawa; Kunio Shirato

doi:10.4020/jhrs.21.450

Original Article

Incidence and Characteristics of Ventricular Fibrillation in Bystander-witnessed Out-of-hospital Cardiac Arrest with Cardiac Etiology in the City of Sendai, Japan

Jun Watanabe ^†, Masaharu Kanazawa ^†, Tetsuo Yagi ^†, Hironori Odakura ^†, Motonobu Kameyama ^†, Katsuhiko Sakurai ^†, Tetsuya Hiramoto ^†, Hiroshi Uenohara ^†, Tomoyuki Endo ^†, Yoshito Koseki ^†, Tsuyoshi Shinozaki ^†, Nobuyuki Shiba ^†, Akihiko Karibe ^†, Masahito Sakuma ^†, Koji Fukuda ^†, Yutaka Kagaya ^†, Katsunori Numakura ^†, Masayuki Yamaki ^†, Yotaro Shinozawa ^†, Kunio Shirato ^†

Author information

Jun Watanabe ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Masaharu Kanazawa ^†
Sendai City Medical Center
Tetsuo Yagi ^†
Sendai City Hospital
Hironori Odakura ^†
Sendai City Hospital
Motonobu Kameyama ^†
Sendai City Hospital
Katsuhiko Sakurai ^†
Sendai Medical Center
Tetsuya Hiramoto ^†
Sendai Medical Center
Hiroshi Uenohara ^†
Sendai Medical Center
Tomoyuki Endo ^†
Department of Emergency Medicine, Tohoku University Hospital
Yoshito Koseki ^†
Medical Information Center, Tohoku University Hospital
Tsuyoshi Shinozaki ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Nobuyuki Shiba ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Akihiko Karibe ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Masahito Sakuma ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Koji Fukuda ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Yutaka Kagaya ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Katsunori Numakura ^†
Sendai City Fire Bureau
Masayuki Yamaki ^†
Sendai City Fire Bureau
Yotaro Shinozawa ^†
Department of Emergency Medicine, Tohoku University Hospital
Kunio Shirato ^†
Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
Author contributions

†These authors contributed equally: Jun Watanabe, Masaharu Kanazawa, Tetsuo Yagi, Hironori Odakura, Motonobu Kameyama, Katsuhiko Sakurai, Tetsuya Hiramoto, Hiroshi Uenohara, Tomoyuki Endo, Yoshito Koseki, Tsuyoshi Shinozaki, Nobuyuki Shiba, Akihiko Karibe, Masahito Sakuma, Koji Fukuda, Yutaka Kagaya, Katsunori Numakura, Masayuki Yamaki, Yotaro Shinozawa, Kunio Shirato

Keywords: Utstein style, Resuscitation, Defibrillation, Brugada syndrome

JOURNAL FREE ACCESS

2005 Volume 21 Issue 4 Pages 450-456

DOI https://doi.org/10.4020/jhrs.21.450

Details

Abstract

Ventricular fibrillation (VF) in out-of-hospital cardiac arrest (OHCA) is a main target for resuscitation.
Methods and results: We analyzed Utstein-style data in Sendai City (population 1,020,000), Japan from January 2002 to March 2004. The incidence of OHCA overall was 62.3/100,000/year. The incidence of the bystander-witnessed VF was 2.5/100,000/year. In younger patients (20–65 years of age), the percentage of VF was 52% when cardiac origin was presumed by bystander witness, and ECG was recorded within 10 minutes from the collapse. In older patients (over 65 years of age), however, the percentage of VF was 21% when they were bystander-witnessed, and ECG was recorded within 10 minutes from the collapse. No VF was reported when the ECG was recorded more than 15 minutes after the collapse. The thirty-day survival rate was 21% in the bystander-witnessed VF cases with cardiac etiology, but 0% in the non-VF cases. The bystander CPR was significantly associated with improved 30-day survival rate. Conclusion: Younger age, male gender, and shorter collapse-to-ECG time are significantly associated with the appearance of VF in bystander-witnessed OHCA with cardiac etiology. Bystander CPR was significantly associated with the improvement in prognosis of those VF patients.

Corresponding author

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