Questionnaire in patients with aborted sudden cardiac death due to coronary spasm in Japan
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ORIGINAL ARTICLE
Questionnaire in patients with aborted sudden cardiac death due to coronary spasm in Japan Shozo Sueda1 · Tetsuji Shinohara2 · Naohiko Takahashi2 · Junya Shite3 · Toshihiro Shoji4 · Masaharu Akao5 · Yoshiyuki Kijima6 · Tohru Masuyama6 · Tsuyoshi Miyaji7 · Katsuhito Yamamoto7 · Yoshihiro Iwasaki8 · Ritsu Yoshida8 · Shigeru Nakamura8 · Yutaka Ogino9 · Kazuo Kimura9 · Masahiro Sasai10 · Hiroshi Suzuki10 · Tetsuzo Wakatsuki11 · Hiroshi Asajima12 · Hiroki Teragawa13 · Tetsunori Ishikawa14 · Kazuo Kitamura14 · Tsuyoshi Oda15 · Takashi Nakayama16 · Yoshio Kobayashi16 · Daisuke Sunada17 · Masaru Yamaki17 · Fumie Nishizaki18 · Yasushi Tomita18 · Kazuo Usuda19 · Hiroyuki Fujinaga20 · Shoichi Kuramitsu21 · Kenji Andou21 · Takahiko Kiyooka22 · Kazushige Kadota23 · Yoshinao Ishii24 · Hayato Ohtani25 · Yuichirou Maekawa25 · Eiji Taguchi26 · Kouichi Nakao26 · Nobuaki Kobayashi27 · Yoshihiko Seino27 · Hitoshi Nakagawa28 · Yoshihiko Saito28 · Issei Komuro29 · Yasuhiro Sasaki30 · Shuntarou Ikeda30 · Osamu Yamaguchi30 · Akiyoshi Kakutani31 · Takahiro Imanaka32 · Masaharu Ishihara32 · Masanobu Ishii33 · Koichi Kaikita34 · Kenichi Tsujita34 Received: 27 February 2020 / Accepted: 5 June 2020 © Springer Japan KK, part of Springer Nature 2020
Abstract Objectives We investigated the medical or mechanical therapy, and the present knowledge of Japanese cardiologists about aborted sudden cardiac death (ASCD) due to coronary spasm. Methods A questionnaire was developed regarding the number of cases of ASCD, implantable cardioverter–defibrillator (ICD), and medical therapy in ASCD patients due to coronary spasm. The questionnaire was sent to the Japanese general institutions at random in 204 cardiology hospitals. Results The completed surveys were returned from 34 hospitals, giving a response rate of 16.7%. All SCD during the 5 years was observed in 5726 patients. SCD possibly due to coronary spasm was found in 808 patients (14.0%) and ASCD due to coronary spasm was observed in 169 patients (20.9%). In 169 patients with ASCD due to coronary spasm, one or two coronary vasodilators was administered in two-thirds of patients [113 patients (66.9%)], while more than 3 coronary vasodilators were found in 56 patients (33.1%). ICD was implanted in 117 patients with ASCD due to coronary spasm among these periods including 35 cases with subcutaneous ICD. Majority of cause of ASCD was ventricular fibrillation, whereas pulseless electrical activity was observed in 18 patients and complete atrioventricular block was recognized in 7 patients. Mean coronary vasodilator number in ASCD patients with ICD was significantly lower than that in those without ICD (2.1 ± 0.9 vs. 2.6 ± 1.0, p
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