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The normal resting heart rate is 60–90 bpm in an average adult. [2] Normal heart rates vary with age and level of fitness, from infants having faster heart rates (110-150 bpm) and the elderly having slower heart rates. [3] Sinus tachycardia is a normal response to physical exercise or other stress, when the heart rate increases to meet the ...
The precise history of rectal thermometry is largely unknown, but medical thermometers have long been made in a tube shape that fits into the anus. Medical literature shows the practice dating back to at least the 18th century, and it is probable that rectal thermometry was thought to be a safer alternative to oral temperature-taking, due to the use of mercury and other toxic chemicals in ...
The dolphins' heart rates increased during ascent. The heart rates during a dive of these actively swimming dolphins were similar to heart rates of a sedentary dolphin at 2 m depth, showing that the heart rate response in diving dolphins is dominated by the diving response and not by an exercise response.
The heart adapts to the increased cardiac demand that occurs during pregnancy in many ways. Cardiac output (Lit./Min.): 6.26; Stroke Volume (Ml.): 75; Heart Rate (Per min.): 85; Blood Pressure: Unaffected; Cardiac output increases throughout early pregnancy, and peaks in the third trimester, usually to 30-50% above baseline. [6]
The average height of 19-year-old Dutch orphans in 1865 was 160 cm (5 ft 3 in). [73] From 1830 to 1857, the average height of a Dutch person decreased, even while Dutch real GNP per capita was growing at an average rate of more than 0.5% per year. The worst decline was in urban areas that in 1847, the urban height penalty was 2.5 cm (1.0 in).
Previously, average oral temperature for healthy adults had been considered 37.0 °C (98.6 °F), while normal ranges are 36.1 to 37.8 °C (97.0 to 100.0 °F). In Poland and Russia, the temperature had been measured axillarily (under the arm). 36.6 °C (97.9 °F) was considered "ideal" temperature in these countries, while normal ranges are 36.0 ...
Modalities applied to measurement of ejection fraction is an emerging field of medical mathematics and subsequent computational applications. The first common measurement method is echocardiography, [7] [8] although cardiac magnetic resonance imaging (MRI), [8] [9] cardiac computed tomography, [8] [9] ventriculography and nuclear medicine (gated SPECT and radionuclide angiography) [8] [10 ...
In most cases, vagal tone is not measured directly. Instead the processes affected by the vagus nerve – specifically heart rate and heart rate variability – are measured and used as a surrogate for vagal tone. Increased vagal tone (and thus vagal action) is generally associated with a lower heart rate and increased heart rate variability.