{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,28]],"date-time":"2025-11-28T00:02:09Z","timestamp":1764288129065,"version":"3.46.0"},"reference-count":38,"publisher":"Walter de Gruyter GmbH","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,12,18]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec id=\"j_ijamh-2017-0071_s_999_w2aab3b7b3b1b6b1aab1c16b1Aa\">\n                    <jats:title id=\"d497823e11247_w2aab3b7b3b1b6b1aab1c16b1aAa\">Background<\/jats:title>\n                    <jats:p>Physical Education and Sport (PES) is compulsory in Cameroonian education system. Cardiac accidents and sudden cardiac deaths (SCD) have been reported during PES examinations. This study aimed to contribute in the prevention of these cardiac accidents by studying pre- and post-exercise electrocardiogram (ECG) pattern modifications in apparently healthy school adolescents.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"j_ijamh-2017-0071_s_998_w2aab3b7b3b1b6b1aab1c16b2Aa\">\n                    <jats:title id=\"d497823e11256_w2aab3b7b3b1b6b1aab1c16b2aAa\">Methods<\/jats:title>\n                    <jats:p>One hundred school adolescents without apparent heart disease [aged 18\u2009\u00b1\u20092 years; body mass index (BMI): 21.9\u2009\u00b1\u20092.3] were included. Participants performed two intermittent sprint-endurance tests. The test consisted in walking 2000 m as warm-up, followed by sprint and endurance races. A 12-leads ECG was performed before and in 5 min after the tests. ECG patterns changes were studied with particular attention to abnormalities that could be associated with risk of SCD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"j_ijamh-2017-0071_s_997_w2aab3b7b3b1b6b1aab1c16b3Aa\">\n                    <jats:title id=\"d497823e11265_w2aab3b7b3b1b6b1aab1c16b3aAa\">Results<\/jats:title>\n                    <jats:p>At rest, ECG patterns variants consisted of bradycardia (30%), sinus arrhythmia (9%), posterior hemi post-block (2%), and early repolarization (3%). which disappeared after exercise in all participants. QTc (ms) and heart rate (HR) increased after exercise (p\u2009&lt;\u20090.001); and RR (ms) decreased post-exercise (p\u2009&lt;\u20090.001). Other changes includes the appearance of the T-waves reversed in precordial leads (V2\u2013V4) (p\u2009&lt;\u20090.001), ventricular (6%), atrial and other supraventricular premature beats (2%) in the post-exercise ECG. Left ventricular hypertrophy (2%), right auricular enlargement (2%), short PR (2%) appeared at the end of the tests.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"j_ijamh-2017-0071_s_996_w2aab3b7b3b1b6b1aab1c16b4Aa\">\n                    <jats:title id=\"d497823e11274_w2aab3b7b3b1b6b1aab1c16b4aAa\">Conclusion<\/jats:title>\n                    <jats:p>This study suggests that an intermittent exercise can induce cardiac abnormalities able to provoke cardiac accidents and SCD in apparently healthy school adolescents.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1515\/ijamh-2017-0071","type":"journal-article","created":{"date-parts":[[2017,8,5]],"date-time":"2017-08-05T06:01:20Z","timestamp":1501912880000},"source":"Crossref","is-referenced-by-count":1,"title":["Pre- and post-exercise electrocardiogram pattern modifications in apparently healthy school adolescents in Cameroon"],"prefix":"10.1515","volume":"31","author":[{"given":"Jerson","family":"Mekoulou Ndongo","sequence":"first","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peguy Brice","family":"Assomo Ndemba","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdou","family":"Temfemo","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"},{"name":"Faculty of Medicine and Pharmaceutical Sciences , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anasthase","family":"Dzudie Tamdja","sequence":"additional","affiliation":[{"name":"Department of Non-Communicable Diseases , Clinical Research Education, Networking and Consultancy (CRENC) , Douala , Cameroon"},{"name":"Department of Internal Medicine , Douala General Hospital , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin Hongieh","family":"Abanda","sequence":"additional","affiliation":[{"name":"Department of Non-Communicable Diseases , Clinical Research Education, Networking and Consultancy (CRENC) , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elys\u00e9e Claude","family":"Bika Lele","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ernest","family":"Tchoudjin","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wiliam Richard","family":"Guessogo","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"},{"name":"National Institute for Youth and Sports Yaound\u00e9 , Yaounde , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Louis-Georges","family":"Gassina","sequence":"additional","affiliation":[{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , Douala , Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samuel Honor\u00e9","family":"Mandengue","sequence":"additional","affiliation":[{"name":"Faculty of Medicine and Pharmaceutical Sciences , University of Douala , Douala , Cameroon"},{"name":"Exercise and Sport Physiology and Medicine Unit, Faculty of Science , University of Douala , P.O. 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