Athlete's Heart: Is the Morganroth Hypothesis Obsolete?

Heart, Lung & Circulation
Mark J HaykowskyAndre LA Gerche

Abstract

In 1975, Morganroth and colleagues reported that the increased left ventricular (LV) mass in highly trained endurance athletes versus nonathletes was primarily due to increased end-diastolic volume while the increased LV mass in resistance trained athletes was solely due to an increased LV wall thickness. Based on the divergent remodelling patterns observed, Morganroth and colleagues hypothesised that the increased "volume" load during endurance exercise may be similar to that which occurs in patients with mitral or aortic regurgitation while the "pressure" load associated with performing a Valsalva manoeuvre (VM) during resistance exercise may mimic the stress imposed on the heart by systemic hypertension or aortic stenosis. Despite widespread acceptance of the four-decade old Morganroth hypothesis in sports cardiology, some investigators have questioned whether such a divergent "athlete's heart" phenotype exists. Given this uncertainty, the purpose of this brief review is to re-evaluate the Morganroth hypothesis regarding: i) the acute effects of resistance exercise performed with a brief VM on LV wall stress, and the patterns of LV remodelling in resistance-trained athletes; ii) the acute effects of endurance exercise on biv...Continue Reading

Citations

Nov 18, 2018·European Heart Journal·Alessandro ZorziDomenico Corrado
May 31, 2019·Heart·Eric J StöhrJohn R Cockcroft
Aug 11, 2020·American Journal of Physiology. Heart and Circulatory Physiology·Tony G DawkinsRob E Shave
Sep 27, 2018·Sports Medicine·Carlo De InnocentiisSabina Gallina
Apr 15, 2020·BMC Pediatrics·Diogo V MartinhoRobert M Malina
Jun 28, 2021·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Krzysztof KusyGrzegorz Grześk
Dec 4, 2020·The Journal of Sports Medicine and Physical Fitness·Daniel A HackettChris McLellan

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