…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…

…rather than rigid ECG thresholds. Several machine learning models for ECG interpretation have been developed to differentiate between OMI and NOMI, reflecting the growing clinical…

…indicate turbulent flow; the ultrasound machine is programmed to depict such flows with green color to indicate that the flow is turbulent. Figure 1 displays…

…the transducer, the billions of erythrocytes in the blood will collectively generate enough reflections to be detected and analyzed by the ultrasound machine. Figure 2…

…that the automatic (machine) calculation of the corrected QT interval be used. Such QTc intervals are derived by all modern ECG machines and the formulas…

…Note that the image becomes more grainy as the zoom is increased. Gain: signal amplification The ultrasound machine amplifies all incoming (reflected) ultrasound waves. However…

…which means that the machine emits ultrasound waves with a certain frequency and subsequently records reflected sound waves at double the frequency of the emitted…

…in the valve orifice. The ultrasound machine displays the recorded flows as the spectral curve (Pulsed wave Doppler or Continuous wave Doppler). The area within…

…the skin it is possible to detect these electrical currents. The electrocardiograph (ECG machine) compares, amplifies and filters the electrical potential differences recorded by the…

…factors. The elapsed time for all ultrasound waves to be emitted, reflected and processed in the machine determines the frame rate. As mentioned above, using…

…incorporated in modern ECG machines) are to be preferred. QTc duration is calculated automatically in all modern ECG machines. Most machines present the longest QTc…

…metabolic disorders, hypoxemia, antiarrhythmic drugs, or electromagnetic disturbance caused by other machines/devices. Below follows ECG tracings demonstrating each type of failure. Figure 1. Failure…

…more complicated, indexes that are utilized in modern ECG machines but the sensitivity and specificity are only negligibly better than the old indexes. Figure 2…

…This recommendation, 1 was issued 16 years ago and fortunately all modern ECG machines can switch to the Cabrera format (including –aVR). We encourage the…