Country cardiograms case 49.

Country cardiograms case 54: Answer.

Country cardiograms case 57.

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...

Large-scale ensemble averaging of ambulatory impedance cardiograms.

Impedance cardiography has been used increasingly to measure human physiological responses to emotional and mentally engaging stimuli. The validity of large-scale ensemble averaging of ambulatory impedance cardiograms was evaluated for preejection period (PEP), interbeat interval, and dZ/dt(min) amplitude. We tested whether the average of "classical" 60-sec ensemble averages across periods with...

Extract from Bridging Research and Policy on HIV/AIDS in Developing Countries – Country Study: Botswana

Background Botswana provides a surprisingly unfortunate case in looking at research-policy linkages on HIV/AIDS. The country has long been viewed as an African economic success story and remains economically strong. Yet, it has failed dismally regarding HIV prevention: the country now has one of the highest prevalence rates of HIV/AIDS in the world. It is estimated that 39% of adults between th...