A Study of Medical Check for Predicting Cardiopulmonary Risk in Swimming, focusing on Diving Reflex Test
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.17 Vol.17】
1. The diving reflex test with ice bag on supine position is the effective manner as the face immersion method in provocating bradyarrythmias.
2. Bradyarrythmias were provocated in high risk cases, but were also observed in healthy persons having a swimming practice without any symptoms.
3. In diving reflex test, the decrease in left ventricular filling and left ventricular systolic function were observed by the echocardiography. These changes were decreased by adding grasping exercise during the test.
4. In healthy university students, AV-nodal rhythm was observed in 58.5%. Supraventricular premature beats and ventricular premature beats were observed too. The longest pouse in normals is considered within two second.
5. The bradycardia was suppressed by atropine, suggestig a vagal reflex. But this effect showed an individual difference and circadian change.
6. A reproductibility of arrythmias were good, but the same arrythmias were not always provocated.
7. In the body immersion without face immersion, resting heart rate was significantly bradycardic but blood pressure was unchanged. The relationship between heart rate and exercise intensity was unchanged by a hydraulic pressure.
8. A diving reflex test is available in predicting arrythmias and other cardio-pulmonary risk, but the final decision should be made by further examination such as a telemeter ECG or cardiac performance during actual swimming.
DESCENTE SPORTS SCIENCE Vol.17/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
2. Bradyarrythmias were provocated in high risk cases, but were also observed in healthy persons having a swimming practice without any symptoms.
3. In diving reflex test, the decrease in left ventricular filling and left ventricular systolic function were observed by the echocardiography. These changes were decreased by adding grasping exercise during the test.
4. In healthy university students, AV-nodal rhythm was observed in 58.5%. Supraventricular premature beats and ventricular premature beats were observed too. The longest pouse in normals is considered within two second.
5. The bradycardia was suppressed by atropine, suggestig a vagal reflex. But this effect showed an individual difference and circadian change.
6. A reproductibility of arrythmias were good, but the same arrythmias were not always provocated.
7. In the body immersion without face immersion, resting heart rate was significantly bradycardic but blood pressure was unchanged. The relationship between heart rate and exercise intensity was unchanged by a hydraulic pressure.
8. A diving reflex test is available in predicting arrythmias and other cardio-pulmonary risk, but the final decision should be made by further examination such as a telemeter ECG or cardiac performance during actual swimming.
DESCENTE SPORTS SCIENCE Vol.17/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Masahisa Usam*1, Tadashi Kurihara*1, Shizuo Sakamoto*2, Ryosuke Okano*3,Shigeo Fujimoto*4 |
|---|---|
| University or institution | *1 Dept. of Internal Medicine, Sumitomo Hospital, *2 Dept. of Healty Sports Med., Urayasu Hospital, Juntendo University, *3 Hokuriku Institute of Wellness and Sports Science, *4 *1 Institure of Health Science and Physical Education, Osaka City University |
Keywords
diving reflex test, bradyarrythmias, swimming practice, grasping exercise, atropine, vagal reflex, arrythmias, cardio-pulmonary risk