…well as far field currents (i.e currents generated by tissues that the electrode is not connected to). Also, external signals from electronics (cell phones…

…action potentials originating in the sinus node, but also by external electrical stimuli that drive the cells to threshold. Any stimulus driving the membrane potential…

…devices. Electrode position (anterior posterior vs. antero lateral) does not affect success, but active compression of the pads lowers defibrillation thresholds and improves success, and…

…Rostock filter or an equivalent amplifier unit between the electrode and the ECG machine. Lidocaine spray for the pharynx and lidocaine gel for the electrode…

…specialist investigations. Both fail more often for practical than for medical reasons: the cuff is in the wrong place, the electrodes come off, the patient…

…adult recommendations. Electrode pads should be positioned as standard, and defibrillation energy levels should remain consistent with those used for non pregnant adults. The fetus…

…body, act as electrical conductors. By placing electrodes on the skin it is possible to detect these electrical currents. The electrocardiograph (ECG machine) compares, amplifies…

…directed towards the back, where there is no exploring electrode (in the 12 lead ECG) that can present the ST segment elevations ( Figure 1 ). Thus…

…ECG criteria for pathological Q waves (Q wave infarction) Lead Definition of pathological Q wave Normal variants V2–V3 ≥0,02 s or QS complex…

…The explanation for this is simple: transmural ischemia is due to a complete and proximal artery occlusion and such occlusions must be managed with immediate…

…digitalis effect, marked LVH with ST T changes — is an argument for imaging rather than a conventional exercise test. Preparation and equipment Cycle ergometer with…

…connect additional electrodes in order to detect right ventricular infarction (leads V3R, V4R, V5R, V6R) and posterolateral infarction (leads V7, V8, V9). Criteria for ischemia…

…in children and adult patients. Recommendations for ECG recording in children Pediatric patients frequently have difficulties being still during clinical examinations. The youngest children often…

…the electrodes (chest leads) which therefore observe stronger electrical potentials. However, severe dilatation (late stages) is usually associated with poor ventricular function and lower QRS…

…the myocardium are transmitted through the body to the skin, where they can be detected using electrodes. The electrocardiograph (ECG machine) records and processes these…

…of piezoelectric crystals are attached to the front of the transducer (Figure 2). The crystals are connected to the ultrasound machine via electrodes. Figure 2…

…concentration to regions with lower concentration, for reasons other than perfusion differences, making image interpretation more ambiguous. Table 1. Radiotracers used for SPECT imaging Thallium…

…is angled alongside the P wave vector, and the exploring electrode is located in front of the P wave vector ( Figure 2, right hand side)…

…the ventricular impulse manages to propagate to the atria where the atrial electrode records the impulse (and assumes that it represents an atrial activation) and…

…after discharge of the impulse in the sinoatrial node. Lower tracing shows first degree sinoatrial block, in which the time interval from impulse discharge to…

…Lateral ventricular infarction. Pre excitation. Switched arm electrodes (negative P and QRS T in lead I). Situs inversus. Left posterior fascicular block is diagnosed when…

…Lateral ventricular infarction. Pre excitation. Switched arm electrodes (negative P and QRS T in lead I). Situs inversus. Left posterior fascicular block is diagnosed when…