{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T16:54:41Z","timestamp":1791392081104,"version":"4.3.3"},"reference-count":31,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,7,28]],"date-time":"2025-07-28T00:00:00Z","timestamp":1753660800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Arrhythmia"],"published-print":{"date-parts":[[2025,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Frequency analysis of the electrocardiographic QRS complex (QRS) was performed to evaluate the abnormal ventricular excitation in hypertrophic cardiomyopathy (HCM), from which we validated a risk stratification for lethal ventricular arrhythmias (L\u2010VAs).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We selected 32 patients with HCM and 60 control subjects from a population of 520 consecutive patients with syncopal seizures in a university hospital. We measured bipolar X, Y, and Z leads and calculated the frequency power using continuous wavelet transform (CWT). We compared frequency powers, ranging from 15 to 250\u2009Hz, between patients with HCM with and without L\u2010VAs. ROC curve analysis was applied to evaluate the differences between groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The frequency powers of the QRS were increased in HCM in the wide frequency ranges, except for 49\u201362\u2009Hz. The sum of the frequency power from 150 to 250\u2009Hz was significantly higher in HCM with versus without L\u2010VAs. The area under the ROC curve was 0.83. The occurrence of L\u2010VAs could be predicted with a sensitivity of 0.92 and a specificity of 0.56.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The high\u2010frequency power hidden in the QRS may be a valuable predictor of L\u2010VAs in patients with HCM.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/joa3.70130","type":"journal-article","created":{"date-parts":[[2025,7,28]],"date-time":"2025-07-28T07:30:10Z","timestamp":1753687810000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["High\u2010frequency content within the\n                    <scp>QRS<\/scp>\n                    complex can predict ventricular tachyarrhythmias in hypertrophic cardiomyopathy"],"prefix":"10.1002","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3213-3663","authenticated-orcid":false,"given":"Takeshi","family":"Tsutsumi","sequence":"first","affiliation":[{"name":"Division of Cardiology Eda Memorial Hospital  Yokohama Kanagawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Yokomachi","sequence":"additional","affiliation":[{"name":"Division of Cardiology Yuai Memorial Hospital  Furukawa Ibaragi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takafumi","family":"Nakajima","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine Dokkyo Medical University  Mibu Tochigi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kentaro","family":"Minami","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine Dokkyo Medical University  Mibu Tochigi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nami","family":"Takano","sequence":"additional","affiliation":[{"name":"Department of the Internal Medicine Hospital of the Imperial Household  Chiyoda\u2010Ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kuniaki","family":"Iwasawa","sequence":"additional","affiliation":[{"name":"Division of Health Service Promotion University of Tokyo  Bunkyou\u2010Ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gaku","family":"Oguri","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine University of Tokyo Hospital  Bunkyou\u2010Ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigeru","family":"Toyoda","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine Dokkyo Medical University  Mibu Tochigi 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