Measurement of Hemodynamics During Mountaineering by Multi-Sensor Ambulatory Blood Pressure Monitoring Device

Abstract

The purpose of this study was to clarify the blood pressure （BP） and physiological response during mountain climbing and stay in high altitude. Six healthy adults climbed Mt. Fuji with measuring blood pressure by multi-sensor ambulatory blood pressure monitoring device. Pulse oximetry was performed during sleep in the research station at the summit of Mt. Fuji. BP during mountain climbing was higher than BP in daily life （24-hour systolic BP: 117.8±5.4 mmHg vs 111.4±5.8 mmHg, p=0.04. awake systolic BP: 123.4±6.9 mmHg vs 115.2±7.2 mmHg, p=0.03）．Awake systolic BP during mountain climbing was correlated with physical activity （R=0.87, p<0.05）．In addition, one subject with acute mountain sickness （AMS） showed abnormal circadian BP rhythm. The present study showed that BP during mountain climbing was associated with physical activity, and abnormal circadian BP rhythm may occur in AMS. We should pay attention with BP elevation and abnormal circadian BP rhythm during mountain climbing in high altitude.