…because the vibrations in the piezoelectric crystals, and thus the electric current they send back to the machine, vary with the amplitude of the reflected…

…is referred to as left axis deviation. The axis is calculated (to the nearest degree) by the ECG machine. The axis can also be approximated…

…is referred to as left axis deviation. The axis is calculated (to the nearest degree) by the ECG machine. The axis can also be approximated…

…can be detected using electrodes. The electrocardiograph (ECG machine) records and processes these electrical currents and presents them as the electrocardiogram (ECG). As mentioned earlier…

…the investigator performs simple measurements and Doppler recordings, which the ultrasound machine uses to calculate various hemodynamic parameters. The Doppler effect The central principle to…

…pulsed wave Doppler sends and analyses sound waves sequentially. The ultrasound machine is programmed to ignore all signals, except those reflected from a certain depth…

…reflected back to the transducer. By analyzing the reflected sound waves, the ultrasound machine creates an image of the tissues. Thus, the principle of ultrasound…

…shift. To analyze reflections from the myocardium, the ultrasound machine filters out all other reflected sound waves, such that only those representing myocardium are recorded…

…the length in the set against the chosen side. An ultrasound machine with a high frequency linear probe, a sterile probe cover and sterile gel…

…oral route may then be considered. Preparation and equipment A 12 lead ECG machine able to print at 100 mm/s . A sterile oesophageal electrode…