Physiological Adaptation to Left Ventricular Enlargement

• Mahfoudh Falih Hasan

  Professor PhD., in physiology, College of Nursing, University of Basra- Iraq

• Fias Hadi Khalaf

  Assistant lecturer, in physiology, College of Nursing, University of Basra- Iraq

  https://orcid.org/0009-0005-7417-2440

• Mohammed Kadhim Mutashar

  A. Lecturer, Department of basic science, College of Nursing, University of Basrah, Basrah, Iraq

  https://orcid.org/0009-0000-3111-8210

• Weam Saleh Mahdi

  Biology Department, Ministry of Education

• Maher Abdulameer Atiyah

  Lecturer, Fundamentals of Nursing Department, College of Nursing, University of Basrah, Basrah, Iraq

  https://orcid.org/0009-0002-7197-4307

Background: Physiological adaptations, especially in sports exercise, usually occur through stress on the body. The changes that occur in the functions of the body's systems are what cause development in the responses of its organs and muscles, which leads to improved athletic performance. Adaptations in response to training include: decreased the heart rate, increased the stroke volume, increased the oxygen uptake, increased the blood hemoglobin levels, and the muscle hypertrophy. Objective of the study: To evaluate the rates of the left ventricular enlargement after years of aerobic training. The research sample: includes (24) athletes and all them practice aerobic activities at the present time, as follows: Six they have (1-2) years of training. Six they have (2-4) years of training. Six they have (4-6) years of training. Six they have (6-8) years of training. The left ventricular mass was examined and diagnosed using the Echocardiogram. Data analyses: The data was analyzed using the SPSS program V. 26. Conclusions: 1-Left ventricular hypertrophy increases with the increase in the years of the aerobic training. 2-During the four years of training, left ventricular enlargement remains within the normal range. 3-after four years, Left ventricular hypertrophy begins to rise above the normal range. 3- The left ventricular hypertrophy in an aerobic athlete is not considered a pathological condition.

 Highlights:

1. Adaptation: Aerobic training increases left ventricular hypertrophy over time.
2. Timeline: Enlargement stays normal for 4 years, increases beyond normal after.
3. Conclusion: Hypertrophy in athletes is non-pathological and a physiological adaptation.

Keywords: Physiological Adaptation; Ventricular Enlargement, Athletic Heart Syndrome.

D. Liberman, Exercised, Vintage Books, 2020.

"7 Great Reasons Why Exercise Matters," Mayo Clinic, [Online]. Available: https://www.mayoclinic.org. [Accessed: Nov. 2, 2018].

"Physical Activity Guidelines for Adults Aged 19 to 64," NHS, Jan. 25, 2022. [Online]. Available: https://www.nhs.uk. [Accessed: Aug. 21, 2023].

"How Much Physical Activity Do Adults Need?," Centers for Disease Control and Prevention, Jun. 22, 2023. [Online]. Available: https://www.cdc.gov. [Accessed: Aug. 21, 2023].

"Physical Activity," WHO, [Online]. Available: https://www.who.int. [Accessed: Aug. 21, 2023].

J. Brugada and B. Benito, "Electrocardiographic Findings in Athletes," European Society of Cardiology, [Online]. Available: https://www.escardio.org. [Accessed: Jul. 5, 2022].

J. A. Drezner, P. Fischbach, V. Froelicher, J. Marek, A. Pelliccia, J. M. Prutkin, et al., "Electrocardiographic Findings in Athletes," Journal of the American Medical Association, Feb. 2013.

N. S. Dhalla and B. Ostadal, "Differences in Concentric Cardiac Hypertrophy and Eccentric Hypertrophy," in Cardiac Adaptations: Molecular Mechanisms, Oct. 12, 2012.

R. E. Klabunde, "CV Physiology | Ventricular and Atrial Hypertrophy and Dilation," [Online]. Available: https://www.cvphysiology.com. [Accessed: Dec. 31, 2020].

R. C. P. Kerckhoffs, J. H. Omens, and A. D. McCulloch, "A Single Strain-Based Growth Law Predicts Concentric and Eccentric Cardiac Growth During Pressure and Volume Overload," Mechanics Research Communications, vol. 42, pp. 40-50, Jun. 2012.

E. J. Rowin, B. J. Maron, E. Appelbaum, M. S. Link, C. M. Gibson, J. R. Lesser, et al., "Significance of False Negative Electrocardiograms in the Preparticipation Screening of Athletes for Hypertrophic Cardiomyopathy," American Journal of Cardiology, vol. 110, no. 7, pp. 1027-1032, Oct. 2012.

K. M. Mohammed, F. H. Mahfoudh, and A. A. Maher, "Morphology of Medical Pathological Terms with the Prefix (Cardio)," International Journal of Language Learning and Applied Linguistics, vol. 3, no. 3, pp. 21-24, 2024.

W. D. Ali, S. S. Hamid, and M. Sabah, "Critical Knowledge Gaps in Iraqi Nurses' Understanding of Antihypertensive Drug Risks," Academia Open, vol. 9, no. 1, Jun. 2024.

W. D. Ali, D. R. Hashoosh, H. S. Mishet, S. H. Sabri, and M. A. Atiyah, "Assessing Nurses' Knowledge on Medication to Reduce Errors in Iraq," Academia Open, vol. 9, no. 2, Sep. 2024.

M. A. Atiyah, "Nurses’ Knowledge Regarding Management of Hypovolemic Shock: A Cross-Sectional Study," Academia Open, vol. 9, no. 2, May 2024.

M. F. Hasan and M. A. Atiyah, "Assessment of Pharmacy Staff Knowledge Towards Prevention of Osteoporosis in Adolescent Girls," Age, vol. 20, no. 6, pp. 30-39, 2024.

S. S. Hamid, W. D. Ali, and M. A. Atiyah, "Assessing Nursing Students' Knowledge of Sleeve Gastrectomy Effects," Academia Open, vol. 9, no. 2, Jun. 2024.

M. K. Mutashar, K. J. Awad, and M. A. Atiyah, "Hyperactivity Disorders: An Assessment of Kindergarten Teachers' Knowledge," Indonesian Journal on Health Science and Medicine, vol. 1, no. 2, Nov. 2024.

F. H. Mahfoudh, "Study of Body Growth Indicators of Physical Education Students Based on WHO International Standards," Modern Sport, vol. 9, no. 13, 2010.

M. F. Al-Kinani, "Identifying the Effective Ratios of Some Body and Physical Changes in the Breathing Reserve of Young Boxers," Journal of Studies and Researches of Sport Education, no. 26, 2010.

A. A. Al-Mussawi, K. J. Awad, A. F. Kareem, Z. A. Hasan, N. S. Kadhim, I. H. Yaseen, L. A. Lazim, and M. A. Atia, "Assess Knowledge of Nurses Who Provide Prenatal Care Concerning Toxoplasmosis in Basra City," International Journal of Nursing Didactics, vol. 6, no. 4, Apr. 2016.

A. A. Maher, "Knowledge of Nursing College Students on Preventive Measures for Irritable Bowel Syndrome: Pre-Experimental Study," International Journal of Integrative and Modern Medicine, vol. 2, no. 3, pp. 16-24, 2024.

M. K. Mutashar, "Navigating Ethics in AI-Driven Translation for a Human-Centric Future," Academia Open, vol. 9, no. 2, Aug. 2024.

H. H. Abdul-Ra’aoof, A. M. Tiryag, and M. A. Atiyah, "Knowledge, Attitudes, and Practice of Nursing Students About Insulin Therapy: A Cross-Sectional Study," Academia Open, vol. 9, no. 1, Jun. 2024.