The Effects of Heartworm Infection and Beta Blockade on Submaximal, Graded Exercise in Dogs." (1986)
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Louisiana State University LSU Digital Commons LSU Historical Dissertations and Theses Graduate School 1986 The ffecE ts of Heartworm Infection and Beta Blockade on Submaximal, Graded Exercise in Dogs. Patricia Louise hopkins Price Louisiana State University and Agricultural & Mechanical College Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_disstheses Recommended Citation Price, Patricia Louise hopkins, "The Effects of Heartworm Infection and Beta Blockade on Submaximal, Graded Exercise in Dogs." (1986). LSU Historical Dissertations and Theses. 4258. https://digitalcommons.lsu.edu/gradschool_disstheses/4258 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Historical Dissertations and Theses by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. 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Zeeb Road, Ann Arbor, Ml 48106 PLEASE NOTE: In all cases this material has been filmed In the best possible way from the available copy. Problems encountered with this document have been identified here with a check mark -/ . 1. Glossy photographs or pages_____ 2. Colored illustrations, paper or print______ 3. Photographs with dark background_____ 4. Illustrations are poor copy______ 5. Pages with black marks, not original copy______ 6. Print shows through as there is text on both sides of page_______ 7. Indistinct, broken or small print on several pages 8. Print exceeds margin requirements______ 9. Tightly bound copy with print lost in spine_______ 10. Computer printout pages with indistinct print_______ 11. Page(s)___________ _ lacking when material received, and not available from school or author. 12. Page(s)_____________seem to be missing in numbering only as text follows. 13. Two pages numbered . Text follows. 14. Curling and wrinkled pages______ 15. Dissertation contains pages with print at a slant, filmed as received____ 16. Other_________________________________________________________________________ University Microfilms International THE EFFECTS OF HEARTWORM INFECTION AND BETA BLOCKADE ON SUBMAXIMAL, GRADED EXERCISE IN DOGS A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The School of Health, Physical Education, Recreation and Dance by Patricia Louise Hopkins Price B.A., H. Sophie Newcomb College, 1971 B.A., Tulane University, 1978 M.S., Louisiana State University, 1980 May, 1986 Dedicated to David for his love, patience, and understanding ii ACKNOWLEDGEMENTS The author would like to thank each member of her committee: Dr. Bonald Byrd, Dr. M. Pat Crawford, Dr. Evelyn Hall, Dr. Mike Mangum, and Dr. C. S. Venugopalan, for their guidance, cooperation and expertise. The author particularly appreciates their examples of professionalism and academic excellence. The author extends special thanks to her major professor, Dr. Byrd, for his continued support and friendship during her graduate studies and for his help in the research. She also expresses appreciation to Dr. Crawford for giving so much of his time during the research project and for his support during her graduate work. The author is indebted to Dr. Nancy O'Malley for her help with surgery, data collection, veterinary supervision of the beagles, and her friendship. Further, the author thanks Dr. Venugopalan for his encouragement and his special attention to the review of the text of this manuscript. The author would also like to thank Dr. Hall and Dr. Mangua for their contribution to the completion of this work. The author extends gratitude to Gabie Church for her statistical advice, and to Russell Strada, Dixie Thompson, and Jay Williams for their technical assistance during the data collection. The author would like to thank the Louisiana Association for Health, Physical Education, Recreation and Dance for their financial grant support of this study. Finally( the author is deeply grateful to her husband for his patience* and for his technical assistance with the equipment and the computer. In addition, she thanks her husband, family and friends who gave her love, encouragement and additional support through prayer. iv TABLE OF CONTENTS Dedication.................................... ........... ii Acknowledgements.............................................. iii List of Tables............................................... viii List of Figures ............... ........................... ix Abstract............... xi Chapter Page I. INTRODUCTION...................................... 1 Statement of the Problem........................... 3 Review of Literature .............................. 4 Cor Pulmonale................................ 4 Heartworm Disease ............................ 6 Transmission ............................ 7 Pathophysiology......................... 8 D i a g n o s i s .............................. 11 E x e r c i s e .................................... 13 The Dog's Response to Exercise........... 14 Exercise Responses After Endurance Training......... 17 Energy Release During Exercise ........... 19 Anaerobic Threshold ..................... 20 Lactate Metabolism ....................... 21 Alternate Causes of Increased Blood L a c t a t e ......................... 23 v TABLE OF CONTENTS (CONTINUED) Chapter Page II. Experiment I: Bxercise and Heartworm Disease......... 25 Methods..................................... 28 Statistical Analysis . ............. 35 Results..................................... 36 D i s c u s s i o n .................................. 58 Summary..................................... 73 III. Experiment 2: Beta Blockade in the Exercising Heartworm Infected D o g ............. 75 Methods..................................... 80 Sham Infusion Exercise ................... 80 Statistical Analysis . ................... 81 Results..................................... 82 Sham Infusion Exercise................... 82 Beta Blocked Exercise ................... 83 Discus s i o n.................................... 117 Sham Infusion Exercise ................... 117 Beta Blocked Exercise ................... 118 Summary........................................129 IV. Conclusions........................................ 131 REFERENCES ............................................. 134 APPENDIX A. Results of Diagnostic Tests ............... 153 APPENDIX B. Means and Standard Deviations of Variables . 156 vi TABLE OF CONTENTS (CONTINUED) Chapter Page APPENDIX C. ANOVAS, Student Newman Keuls, and Paired T-Tests Tables for Normal Exercise .......... 187 APPENDIX D. ANOVAS and Student Newman Keuls Tables for Sham Infusion Exercise . ............... 211 APPENDIX E. MANOVA, ANOVA and Wilks’-Lambda Criterion Tests, Student Newman Keuls, and Paired T-Test Tables for Beta Blocked vs Normal Exercise................. 233 VITA ................................................. 263 vii LIST OF TABLES Table Page 1. Biometric Data: Means and Standard Deviations of Age and Weight......................................... 29 2. Treadmill P r o t o c o l ................................... 34 3. Summary of Significant Effects and Interactions During Normal E x e r c i s e ................................... 37 4. Summary of Significant Paired t-Tests During Normal Exercise........................................... 38 5. Exercise Lactate Values ............................... 63 6. Oxygen Consumption Values in a Submaximal Exercise Test . 64 7. Mean Arterial Blood