{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T20:48:50Z","timestamp":1790282930202,"version":"4.1.0"},"reference-count":44,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2024,11,28]],"date-time":"2024-11-28T00:00:00Z","timestamp":1732752000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background: Myocardial infarction (MI) is a common emergency with high rates of morbidity and mortality. Current risk stratification scores for non-ST-elevation MI (NSTEMI) use subjective or delayed information. Heart rate variability was shown to correlate with prognosis following MI. This study aimed to evaluate ultra-short heart rate variability (usHRV) as a prognostic factor in NSTEMI patients. Methods: A retrospective analysis was performed on 183 NSTEMI patients admitted to Rambam Health Care Campus in 2014. usHRV measures, including the standard deviation of normal-to-normal intervals (SDNN) and root mean square of successive differences (RMSSD), were calculated. Logistic regression assessed whether clinical, laboratory, or usHRV parameters predicted severe in-hospital complications like heart failure (HF), atrial flutter\/fibrillation (AFL\/AF), ventricular tachycardia\/fibrillation (VT\/VF), and atrioventricular block (AVB). Both Cox and logistic regression were used for survival analysis. Results: Of 183 patients (71.6% male, mean age 67.1), 35 (19%) died within 2 years. In-hospital complications included 39 cases (21.3%) of HF, 3 cases (1.6%) of VT\/VF, and 9 cases (4.9%) of AVB. Lower usHRV was significantly associated with higher mortality at 2 years and showed marginal significance at 90 days and 1 year. Increased usHRV was linked to a higher risk of in-hospital ventricular arrhythmia (VT\/VF). Conclusions: Overall, this study is in agreement with previous research, showing a correlation between low usHRV and a higher mortality risk. However, the association between usHRV and the risk of VT\/VF demands further investigation. More expansive prospective studies are needed to strengthen the observed associations.<\/jats:p>","DOI":"10.3390\/jcm13237255","type":"journal-article","created":{"date-parts":[[2024,11,29]],"date-time":"2024-11-29T08:24:14Z","timestamp":1732868654000},"page":"7255","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Prognostic Value of Ultra-Short Heart Rate Variability Measures Obtained from Electrocardiogram Recordings of Hospitalized Patients Diagnosed with Non-ST-Elevation Myocardial Infarction"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-4829-1675","authenticated-orcid":false,"given":"Maya","family":"Reshef","sequence":"first","affiliation":[{"name":"Internal Medicine \u201cA\u201d Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7280-4062","authenticated-orcid":false,"given":"Shay","family":"Perek","sequence":"additional","affiliation":[{"name":"Internal Medicine \u201cA\u201d Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"Emergency Medicine Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525422, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tamer","family":"Odeh","sequence":"additional","affiliation":[{"name":"Internal Medicine \u201cA\u201d Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"Emergency Medicine Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525422, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Khalil","family":"Hamati","sequence":"additional","affiliation":[{"name":"Internal Medicine \u201cA\u201d Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayelet","family":"Raz-Pasteur","sequence":"additional","affiliation":[{"name":"Internal Medicine \u201cA\u201d Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"Emergency Medicine Department, Rambam Medical Health Care Campus, Haifa 3109601, Israel"},{"name":"The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525422, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/S0140-6736(16)30677-8","article-title":"Acute myocardial infarction","volume":"389","author":"Reed","year":"2017","journal-title":"Lancet"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1347","DOI":"10.1016\/S0140-6736(21)02391-6","article-title":"Acute coronary syndromes","volume":"399","author":"Bergmark","year":"2022","journal-title":"Lancet"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2155","DOI":"10.1056\/NEJMoa0908610","article-title":"Population trends in the incidence and outcomes of acute myocardial infarction","volume":"362","author":"Yeh","year":"2010","journal-title":"N. 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