ELECTROCARDIOGRAPHIC CHANGES AT HIGH ALTITUDE

Electrocardiographic changes at high attitude.

SUBJECTS AND METHODS Fifteen subjects had cardiograms recorded. Of these, four were Sherpas, on whom only single records were taken at the winter station. For reasons of clarity, the quantitative results reported are from six subjects on whom most work was done. Their age and weight are shown in Table I; they all acclimatized well by normal climbing criteria. The cardiograms of the other subjec...

Respiratory Changes at High Altitude.

Electrocardiographic changes during exercise in acute hypoxia and susceptibility to severe high-altitude illnesses.

BACKGROUND The goals of this study were to compare ECG at moderate exercise in normoxia and hypoxia at the same heart rate, to provide evidence of independent predictors of hypoxia-induced ECG changes, and to evaluate ECG risk factors of severe high-altitude illness. METHODS AND RESULTS A total of 456 subjects performed a 20-minute hypoxia exercise test with continuous recording of ECG and ph...

Cerebral Venous Sinus Thrombosis Masquerading as High Altitude Cerebral Edema at Extreme Altitude

Introduction: Extreme altitude travel has gained popularity globally for adventurous, scientific, and military endeavors. Cerebral venous sinus thrombosis (CVST) at extreme altitude is a rare, covert, and emergent condition requiring immediate intervention. Case Presentation: A case of CVST masqueraded as high altitude cerebral edema (HACE) at 6700 m/22000 ft i...

Electrocardiographic Changes in Persons with Acute High Altitude Hypoxia (studies in a Low Pressure Chamber)

Chest auscultation, and serial maximum ventilatory function tests were carried out on twelve healthy non-smokers, eight healthy cigarette smokers, and five asthmatics, before, during and after moderately heavy treadmill exercise. During the exercise, asthmatics, as well as non-asthmatics, showed increased maximum flow rates. Significant post-exercise bronchoconstriction was exhibited by the hea...