DiveReflexh08 - Updated 12-22-03 BSL PRO Lesson H08: ECG...

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Updated 12-22-03 BSL PRO Lesson H08: ECG Dive Reflex Active Learning This lesson is based on a presentation given by Dr. Jennifer Lundmark and Ms. Andrea Salmi at the HAPS Conference, Maui, HI, June 2-7, 2001 Overview Active Learning Active Learning Lessons convert traditional physiology laboratories into inquiry-based exercises. Students perform a lab exercise designed to encourage them to make observations and develop and test multiple hypotheses during a single lab period using the BIOPAC data acquisition system. These inquiry-based exercises are designed to give students experience with the scientific method, group discussion, design of simple experimental protocols, and the responsibility of making their own decisions. This Active Learning lesson allows students to participant in, rather than merely receive, their own education. This lesson assumes that students are familiar with the concepts of apnea, brachycardia, ECG, and heart rate variation, and provides only the basic setup and recording steps students need to create their own experiment. Students will follow an experiment to record and measure change in heart rate (ECG) from a human, and then design and test an experiment to identify the exact cause of the change. To learn more about the benefits of Inquiry-based, Active Learning Labs, read these results from an NSF-CCLI Grant- Supported Project on Inquiry-based labs using the Biopac Student Lab System. * For explanation of these terms and further experimental guidance, review the Appendix . ECG Dive Reflex The application of cold water to the face during breath holding (apnea) initiates the diving reflex . The diving reflex results in a decrease in heart rate ( bradycardia ). This lesson investigates the temperature-dependent nature of bradycardia. Subjects voluntarily hold their breath and immerse their face into cold water ranging from 37°C (room temperature) to 3°C (ice water) while their heart rate is monitored. Changes in heart rate are averaged over two trials. The following Web links offer further information about the dive reflex: Immersion Effect II - SCUBA Diving & Physiology web page Unraveling the mammalian diving reflex - Erik Seedhouse Supraventricular Tachycardias - American Heart Association Drowning overview > Mammalian dive reflex - EMedicine EKG Bibliography 2003 www.biopac.com Page 1 of 5
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BSL PRO Lesson H08 BIOPAC Systems, Inc. Ob
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This note was uploaded on 11/14/2011 for the course ECE 3820 taught by Professor Wang during the Fall '11 term at GWU.

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DiveReflexh08 - Updated 12-22-03 BSL PRO Lesson H08: ECG...

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