…is in. The three phases following a sudden cardiac arrest were described by Weisfeldt and Becker (2002). Drawing on physiology, observational and experimental studies, they…

…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…

…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…

…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…

…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…

…by a repolarization (recovery). The action potential occurs in all cardiac cells but its appearance varies depending on cell type. During de and repolarization ions…

…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…

…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…